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| EV8500 CML Microcircuits COMMUNICATION SEMICONDUCTORS UM8500/4 January 2004 Evaluation Kit User Manual Provisional Issue Features * CMX850 (contains 80C51) Product Evaluation * Fully Isolated 2-Wire Line Interface with FCC68 or CTR21 DAA * Modem Calling/Answering and CLI Firmware * Full Access to Unused 80C51 Ports * `AT' Command Compatible Firmware * Control via PC Terminal Emulator * Opto-Isolated Ring Detect Circuitry and OptoMOS Hook Relay * Keyboard Encoder (16 x 8 matrix) * 8kB Internal RAM, 4Mb External FLASH and 64kB External RAM * On-Board FLASH Reprogramming * Dual Analogue-to-Digital Inputs * Dual Low-Power PWM Outputs * User's Prototyping Area * Space for Optional Telco-Specific Components 1 Brief Description The EV8500 Evaluation Kit comprises a single board containing a CMX850 Communications Controller (80C51 core and V.22 bis Modem IC), line interface components and a serial communications port for interfacing to a PC. Firmware is provided to implement a standard `AT' commands interface which is used to control the evaluation board via a standard terminal emulator. PC software is provided to support serial downloading of firmware updates to the evaluation kit. The board is powered from a single 3 - 3.6V dc power supply. Removal of jumpers allows the user to measure device current. Important signals can be monitored via test points and header pins. The evaluation board has a 2-wire line interface to provide line matching and dc isolation. This 2-wire interface is connected to the line using an OptoMOS relay. Where components are telco-specific (line impedance, line protection, etc.) space is provided for the user to add appropriate components. (c) 2004 CML Microsystems Plc CMX850 Evaluation Kit EV8500 CONTENTS Section 1 2. Page Brief Description.................................................................................. 1 Preliminary Information ...................................................................... 4 2.1 Laboratory Equipment............................................................ 4 2.2 Handling Precautions ............................................................. 4 2.3 Static Protection ..................................................................... 4 2.4 Contents - Unpacking ............................................................ 4 2.5 Approvals ................................................................................ 4 Quick Start ........................................................................................... 5 3.1 Setting-Up................................................................................ 5 3.2 Adjustments ............................................................................ 5 3.3 Operation................................................................................. 5 Signal Lists .......................................................................................... 7 Block Diagram, Circuit Schematics and Board Layout ................... 13 Detailed Description .......................................................................... 15 6.1 Hardware Description ........................................................... 15 6.2 Adjustments and Controls.................................................... 16 6.3 Firmware Description............................................................ 16 6.4 Terminal Emulator ................................................................ 27 6.5 Compiling new firmware with the Keil compiler ................. 27 6.6 Reprogramming the FLASH ROM ........................................ 27 6.7 Negotiation and Data Transfer ............................................. 28 6.8 Troubleshooting ................................................................... 29 Performance Specification................................................................ 30 7.1 Electrical Performance.......................................................... 30 3. 4. 5. 6. 7. (c) 2004 CML Microsystems Plc 2 UM8500/4 CMX850 Evaluation Kit EV8500 Power Supply J6 J5 RS232 Cable IBM-PC EV8500 J3 PSTN Simulator Reference Modem Figure 1 System Block Diagram (c) 2004 CML Microsystems Plc 3 UM8500/4 CMX850 Evaluation Kit EV8500 2. 2.1 Preliminary Information Laboratory Equipment The following laboratory equipment is needed to use this evaluation kit: 2.1.1 2.1.2 3 - 3.6V dc Power Supply An IBM compatible PC; 66MHz `486 or better with a serial communications port, running Microsoft Windows operating systems. 2.2 Handling Precautions Like most CML evaluation kits, this product is designed for use in office and laboratory environments. The following practices will help ensure its proper operation. 2.3 Static Protection This product uses low power CMOS circuits which can be damaged by electrostatic discharge. Partially damaged circuits can function erroneously, leading to misleading results. Observe ESD precautions at all times when handling this product. 2.4 Contents - Unpacking Please ensure that you have received all of the items on the separate information sheet (EK8500) and notify CML or your supplier within 7 working days if the delivery is incomplete. 2.5 Approvals This product is designed to meet CTR21/FCC68 telecom approval requirements. Users are advised to observe all local statutory requirements which may apply to this product before direct or indirect connection to any public telecommunication system. (c) 2004 CML Microsystems Plc 4 UM8500/4 CMX850 Evaluation Kit EV8500 3. Quick Start This section provides instructions for users who wish to experiment immediately with the evaluation kit. A fuller description of the kit and its use appears later in this document. 3.1 Setting-Up The board is powered from a single 3 - 3.6V bench power supply and is pre configured as an FCC68 modem with a pre-programmed FLASH memory. An RJ11 (US style) phone jack, J3, is provided for 2-wire line connection. Power is connected via the two-way socket, J6. Attach the 9-way RS232 cable between connector J5 and the serial port of the PC. Connect an external modem/line simulator to the evaluation kit using a suitable RJ11 telephone cable (not supplied). 3.2 Adjustments The line matching components fitted are suitable for an FCC68 application. The line matching components can be adjusted, as required (refer to CMX850 data sheet and Midcom transformer recommendations). Telco-specific components may be added, as required. 3.3 Operation The EV8500 evaluation board allows the user to perform calling, answering and simple data transfer with a suitable PSTN simulator and third party modem (these are external to the board and not supplied). The board also allows the user to attach laboratory test equipment to perform simple CMX850 device evaluation tests i.e. current measurement, tone generation and detection. The board is controlled by the AT command set described in Section 6.3, by running a terminal emulator program on the host PC. A suitable emulator is the `Hyper Terminal' program which operates under Windows operating systems. The EV8500 AT command set consists of Basic, Extended and CML Specific commands. The board has two modes of operation: AT Command Mode In this mode the command processor firmware is constantly checking to see if the user has typed a valid AT command. When a valid command is received the firmware will execute that command. While the firmware is operating in this mode, the user can instruct it to manually answer a call, originate a call, go on/off hook, read/write to S-registers, issue CML specific AT commands, and perform a number of other AT command functions. The board always starts in AT Command mode after power is applied and board initialisation is complete. The CML specific AT commands allow the user to directly control the CMX850 device for evaluation purposes. Note, customer modified CMX850 device registers will be overwritten when Dial and Answer AT commands are executed. See section 6.3 for full details and limitations of the CML specific AT command set. (c) 2004 CML Microsystems Plc 5 UM8500/4 CMX850 Evaluation Kit EV8500 The Dial and Answer commands will execute the relevant DTMF transmit, call progress tone detection and negotiation (handshaking) firmware routines before a connection to a remote modem can be established. Negotiation may be aborted by using the +++ AT escape sequence. Note, if the S0 register is modified to a non-zero value during this operating mode, the CMX850 status register will be polled every 20ms to check for ring detect status. If valid ringing is detected the EV8500 Evaluation board will automatically answer the call after the number of ring cycles specified by the contents of the S0 register. Data Transfer Mode After gaining a connection (i.e. a successful negotiation) with a remote modem the board will be operating in data transfer mode. In this mode the board will transmit all the data it receives from the RS232 computer terminal to the remote modem via the 2-wire line. Likewise any data received from the remote modem via the 2-wire line will be sent to RS232 computer terminal. Whilst operating in this mode the data stream from the RS232 computer terminal is monitored for the escape code sequence (defaulted to +++). If this sequence is encountered during data transfer the firmware will revert to on-line AT command mode. Whilst in on-line AT command mode, the board-to-remote modem connection may be aborted by typing ATH0 (instructs modem to go on-hook). Alternatively the user can enter relevant AT commands or return to data transfer mode by using the ATO command. The modem line speed is much lower than the speed of the RS232 interface (which is running at 19200bps) and the EV8500 firmware only provides a small amount of data buffering. Therefore to prevent the data buffer from overflowing the data flow between the RS232 and CMX850 should be controlled by the RTS/CTS (Request/Clear to Send) hardware handshake lines. The CMX850 settings used during negotiation and data transfer will be based on the contents of the S-registers when the call was originated or answered. The S-registers are described in Section 6.3. Certain S-register settings (relevant to the CMX850 modem configuration), modified during on-line AT command mode, will only take effect when a new call is originated or answered. For example, new CMX850 Tx gain settings (S25 register) modified in on-line AT command mode will be ignored until the next call. CLI Type I and II Detection The EV8500 firmware will automatically detect a type I CLI message between the first and second rings of an incoming connection. If a valid CLI type I message is detected during this period then the message "CLI I" is displayed. The EV8500 firmware can also detect a type II CLI message. As this applies to phone rather than modem systems a special `feature phone' mode has been added (S register 14, bit 0). The EV8500 firmware with `feature phone' enabled (AT command AT@F9) does not attempt a modem connection when going off-hook but instead waits to detect a type II CLI message. If a valid type II CLI message is detected then the message "CLI II" is displayed. The contents of the last received CLI message can be viewed using the AT command AT@F6. A simple CLI message when displayed might produce something similar to the following. AT@F6 DL Call Setup, Len 14 Iden: 01621 875500 OK (c) 2004 CML Microsystems Plc 6 UM8500/4 CMX850 Evaluation Kit EV8500 4. Signal Lists CONNECTOR PINOUT Connector Ref. J1 Connector Pin No. 1 2 3 4 5 6 7 8 9 10 Signal Name VIN A VIN B HD GND PHONETXP PHONETXN PHONERX PWM2 PWM1 GND --n/c n/c RING TIP n/c n/c DCD RXD TXD DTR GND DSR RTS CTS RI VDD GND Signal Type Input Input Input Power Output Output Input Output Output Power --n/c n/c BI BI n/c n/c Output Input Output Input Power Output Input Output Output Power Power Description CMX850 ADC input A CMX850 ADC input B Modem Hook detect input Analogue ground connection Non-inverted phone TX output Inverted phone TX output Buffered phone RX input CMX850 PWM output 2 CMX850 PWM output 1 Analogue ground connection Refer to jumpers section No connection No connection Bi-directional 2-wire line Bi-directional 2-wire line No connection No connection RS232 DataCarrierDetect output RS232 Receive data input RS232 Transmit data output RS232 DataTerminalReady output RS232 ground reference RS232 DataSetReady output RS232 RequestToSend input RS232 ClearToSend output RS232 RingIndicator output 3 - 3.6 volt supply connection Ground supply connection J2 J3 --1 2 3 4 5 6 J5 1 2 3 4 5 6 7 8 9 J6 1 2 (c) 2004 CML Microsystems Plc 7 UM8500/4 CMX850 Evaluation Kit EV8500 CONNECTOR PINOUT Connector Ref. J4 Connector Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 24 26 Signal Name VDD KBR0 KBR1 KBR2 KBR3 KBR4 KBR5 KBR6 KBR7 KBC0 KBC1 KBC2 KBC3 KBC4 KBC5 KBC6 KBC7 KBC8 KBC9 KBC10 KBC11 KBC12 KBC13 KBC14 KBC15 GND Signal Type Power Input Input Input Input Input Input Input Input Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Power Description Power supply connection Keyboard scanner row input Keyboard scanner row input Keyboard scanner row input Keyboard scanner row input Keyboard scanner row input Keyboard scanner row input Keyboard scanner row input Keyboard scanner row input Keyboard scanner column output Keyboard scanner column output Keyboard scanner column output Keyboard scanner column output Keyboard scanner column output Keyboard scanner column output Keyboard scanner column output Keyboard scanner column output Keyboard scanner column output Keyboard scanner column output Keyboard scanner column output Keyboard scanner column output Keyboard scanner column output Keyboard scanner column output Keyboard scanner column output Keyboard scanner column output Power supply connection (c) 2004 CML Microsystems Plc 8 UM8500/4 CMX850 Evaluation Kit EV8500 CONNECTOR PINOUT Connector Ref. J7 Connector Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Signal Name GND n/c n/c A0 WEN E D0 D1 D2 D3 D4 D5 D6 D7 n/c n/c PWM1 PWM2 BNK0 BNK1 BNK2 P0.0 P0.1 P0.2 INT9 ALE Signal Type Power n/c n/c Output Output Output BI BI BI BI BI BI BI BI n/c n/c Output Output Output Output Output BI BI BI Input Output Description Ground supply connection No connection No connection Address selection output Write enable output Enable output (inverted CSN3) Bi-directional data line Bi-directional data line Bi-directional data line Bi-directional data line Bi-directional data line Bi-directional data line Bi-directional data line Bi-directional data line No connection No connection CMX850 PWM output 1 CMX850 PWM output 2 Bank select signal 0 Bank select signal 1 Bank select signal 2 Unassigned control line Unassigned control line Unassigned control line Super interrupt input Address Latch Enable output (c) 2004 CML Microsystems Plc 9 UM8500/4 CMX850 Evaluation Kit EV8500 CONNECTOR PINOUT Connector Ref. J8 Connector Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Signal Name A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 GND GND CSN3 CSN2 CSN1 CSN0 WEN INT1 T0 VDD Signal Type Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Output Power Power Output Output Output Output Output Input Output Power Description Addressing line Addressing line Addressing line Addressing line Addressing line Addressing line Addressing line Addressing line Addressing line Addressing line Addressing line Addressing line Addressing line Addressing line Addressing line Addressing line Ground supply connection Ground supply connection Addressing selection output Addressing selection output Addressing selection output Addressing selection output Write enable output Interrupt 1 input Timer 0 output Supply connection (c) 2004 CML Microsystems Plc 10 UM8500/4 CMX850 Evaluation Kit EV8500 TEST POINTS Test Point Ref. TP1 TP2 TP3 TP4 TP5 TP6 TP7 TP8 TP9 TP10 TP11 TP12 TP13 TP14 TP15 TP16 TP17 TP18 TP19 TP20 TP21 TP22-23 TP24-27 Default Measurement Hi VDD/2 2.5V 0V 0V Description Line receive input signal Non-inverted line transmit signal Inverted line transmit signal Line receive feedback signal CMX850 ADC input A CMX850 VCAP signal CMX850 ADC input B Phone receive feedback signal CMX850 serial receive data input CMX850 data carrier detect output Ring detect, CMX850 RD signal Ring detect timeout, CMX850 RT signal Bias voltage Power supply positive voltage, VDD signal Address latch enable output Interrupt 9 input CMX850 request to send input CMX850 serial transmit data CMX850 reference voltage CMX850 PWM output 1 CMX850 PWM output 2 Analogue circuit ground reference Digital circuit ground reference (c) 2004 CML Microsystems Plc 11 UM8500/4 CMX850 Evaluation Kit EV8500 JUMPERS Link Ref. JP1 JP2 JP3 JP4 JP5 JP6-8 JP9 J2 Positions Open/Closed Open/Closed Open/Closed Open/Closed Open/Closed Open/Closed Open/Closed 1-2 3-4 5-6 7-8 9-10 11-12 13-14 15-16 17-18 19-20 Notes: BI n/c = = Default Position Open Closed Open Closed Open Closed Closed Open Closed Closed Closed Closed Closed Closed Closed Closed Open Bi-directional No connection Description Close to disable multiplexed address and data signals VDUT breakout for current measurements Close to hold CMX850 in reset state Close to enable RS232 interface Close to enable internal BootROM. Close to connect normal FLASH bank selection signals Close to connect FLASH chip enable signal (CSN1) No normal function (P5.0 grounded when closed) Connects Clear To Send signal to serial interface Connects Data Terminal Ready signal to serial interface Connects Data Set Ready signal to serial interface Connects Ring Indicator signal to serial interface Connects Receive data signal to serial interface Connects Transmit data signal to serial interface Connects Request To Send signal to serial interface Connects Data Carrier Detect signal to serial interface Not connected (c) 2004 CML Microsystems Plc 12 UM8500/4 CMX850 Evaluation Kit EV8500 5. Block Diagram, Circuit Schematics and Board Layout For clarity, the circuit schematics are available as separate, high-resolution files. J5 Power Conditioning Serial Interface Line Interface Ring Detect J6 CMX850 Crystal Circuits Phone Interface FLASH and Data RAM Figure 2 Block Diagram (c) 2004 CML Microsystems Plc Decoders 13 Hook Detect J1 UM8500/4 J3 CMX850 Evaluation Kit EV8500 Figure 3 Evaluation Board - Layout (c) 2004 CML Microsystems Plc 14 UM8500/4 CMX850 Evaluation Kit EV8500 6. 6.1 6.1.1 Detailed Description Hardware Description IDD Measurement The evaluation device IDD may be measured by removing jumper JP2 and replacing it with a multimeter. 6.1.2 On and Off Hook Caller ID (Type I and II) This function provides a high impedance, on-hook AC path for the routing of Caller ID signals to the CMX850, allowing the Type I Caller ID protocols to be implemented. 6.1.3 Line Protection Line protection is provided by the Sidactor component E1. Sidactor is the trade name for a type of Transient Voltage Suppressor (TVS) manufactured by Teccor Electronics. 6.1.4 Simplified European FCC68 Approvable DAA, as Shipped The values of R4, R6, R7, R8, R9, C8 and C24 are optimal values with respect to the Midcom 82111 transformer. Parts C10 and D4 are not required for this simplified design but are replaced with 0 links. 6.1.5 CTR21 Approvable DAA The following components may be fitted to provide a 60mA current limit as required by CTR21. Component Identifier R10 R11 C11 D4 D5 U4 U5 Component Type or Value 33k 11R5 10F, 50V 33v, 600W CBRHD-02 BC846ALT1 FZT605 An alternative transformer, the Midcom 82107, must be fitted and the components C8, C10, C24, and R6 changed. This is to match the characteristics of the Midcom 82107 transformer and the CTR21 reference impedance. The required component values are as specified below. FCC68 Midcom 82111 33nF 0R 39pF 100k CTR21 Midcom 82107 100nF 2.2F 180pF 91k T1 C8 C10 C24 R6 6.1.6 Isolated Ring detect Ring Detection is provided by an opto-isolated circuit whose response time is set by components R1 and C5 and whose detect threshold is approximately 20VRMS. (c) 2004 CML Microsystems Plc 15 UM8500/4 CMX850 Evaluation Kit EV8500 6.2 Adjustments and Controls Various line interface signals can be accessed via test points and breakout connectors. A user's prototyping area is also provided. 6.3 Firmware Description The 80C51 microcontroller core internal to the CMX850, which is fitted on the EV8500 evaluation kit, runs the latest firmware. This is programmed into the 4 Megabit FLASH (U13) by CML before shipment. Please check the CML web site for firmware status and updates. The latest source code and programming files (EF8500xx.Hnn, where xx represents the version number and nn the code bank number) can be downloaded from the CML web site. The serial communications firmware supplied in the CMX850 assumes the following serial configuration: 8 data bits, no parity, 1 stop bit and 19,200 baud with hardware flow control support. The firmware routine run at start-up and reset performs the following important tasks: Peripheral Interrupt Initialisation CMX850 ports and I/O direction initialisation Serial Communication Interface (SCI) initialisation Loads factory profile 0 Resets CMX850 peripherals The message EF8500 Vx.x, will be displayed in the terminal emulator window when these tasks have been completed, or an error message will be displayed The firmware only supports DTMF dialling. AT command echoing is an option available in the firmware and involves echoing the received characters sent by the PC. The firmware also provides the option of sending result codes to the PC. These responses can be in either an alpha or numeric form. The AT command set for the EV8500 Evaluation kit is tabulated below. These commands can be entered on a PC running Windows terminal emulator software, such as the `Hyper Terminal' program supplied with Windows operating systems. AT commands should be typed in uppercase only. The extended AT command set (AT!x) allows access to the internal features of the 80C51 core of the CMX850 and is provided in the monitor.c, monitor.h, sfr.asm and breakpoint.asm files for inclusion into customer projects. The `Hyper Terminal' Send Text File facility is useful for data transfer i.e. when the EV8500 has established a connection with a remote modem. This terminal emulator facility can also be used for sending long AT command scripts to the EV8500. These scripts should consist of a single line multiple AT command, for example. ATH1@RE224=4929@RE230?@RE225=4567 (c) 2004 CML Microsystems Plc 16 UM8500/4 CMX850 Evaluation Kit EV8500 Basic EV8500 AT Commands Command ATA Description Answer The EV8500 will go off-hook and attempt to establish a remote connection. Syntax: ATA A/ Repeat previous command line Repeat the previously entered command line. Note: This command string does not terminate with a carriage return. Syntax: A/ ATBn Select communication standard Select the communication standard specified by the parameter n Syntax: ATBn ATDn Dial command Commands the modem to go off-hook, dial according to the entered parameter and attempt to establish a connection. The maximum length of the dial string is 23 characters excluding the ATD prefix. Syntax: ATD9,01621875500 ATEn Echo command characters Syntax: ATEn (c) 2004 CML Microsystems Plc 17 UM8500/4 CMX850 Evaluation Kit EV8500 Command ATHn Description Hook switch control Set the current state of the modem hook switch. Syntax: ATHn ATIn Identification Instruct the modem to return product information Syntax: ATIn ATNn Modulation fallback options Syntax: ATNn ATO Return to online mode Returns the modem to online data transfer mode. Syntax: ATO ATQn Configure modem responses Syntax: ATQn ATSn S-Register read and write command Command to read and display the contents of an S register (first syntax) or write the value of an S register (second syntax). See S register table for register usage. Syntax: ATSn? (c) 2004 CML Microsystems Plc 18 UM8500/4 CMX850 Evaluation Kit EV8500 Command ATVn Result code format Syntax: ATVn Description Parameter usage: n=0 Display modem result codes as numbers (see table for meanings) n=1 Display modem result codes as text (default) ATXn Calling characteristics Select which set of calling characteristics are to be used. Syntax: ATXn Extended EV8500 AT Commands Command AT&Fn Description Recall Factory Defaults Load one of the provided factory profiles without resetting the CMX850 hardware. Syntax: AT&Fn AT&Gn Guard tone selection Select the guard tone to be transmitted in high band QAM or DPSK modes. Syntax: ATZn (c) 2004 CML Microsystems Plc 19 UM8500/4 CMX850 Evaluation Kit EV8500 CML Specific EV8500 AT Commands Command AT@AC Description Set RTC alarm value or clear the current alarm Set value of the RTC alarm time (first syntax) or clear the current alarm time if set (second syntax). When the alarm time is reached the message "RTC Alarm" will be displayed and the alarm cleared. Syntax: AT@Addddd,hh,mm,ss Number of days in the alarm time Number of hours in the alarm time Number of minutes in the alarm time Number of seconds in the alarm time AT@Bn BER test duration Set the duration of the next BER test originated. Syntax: AT@Bn AT@CS Control the Analogue to Digital Converter Set the value of the lower ADC threshold (first syntax), or the upper ADC threshold (second syntax). Start continuous readings from input A or B at the specified rate (third and fourth syntax). Stop continuous reading if started (fifth syntax) and display current ADC reading value (sixth syntax). Syntax: AT@CLnnn AT@E Equaliser settings Set the equaliser setting for the receive auto equaliser (first syntax) or the fixed receive and transmit path equaliser (second syntax) Syntax: AT@ERn (c) 2004 CML Microsystems Plc 20 UM8500/4 CMX850 Evaluation Kit EV8500 Command AT@Fn Test Functions Syntax: AT@Fn Description Parameter usage: n=0 Force modem on-hook and un-assert modems DCD line n=1 Force modem off-hook and assert modems DCD line n=2 Delay for 100 ms n=3 Delay for 1 second n=4 Initiate BER test as Rx (answering) modem n=5 Initiate BER test as Tx (originating) modem n=6 Display data from last received CLI packet n=7 Reads and displays the contents of the CMX850 modem status register when an interrupt occurs. This function times out after 30 seconds. n=8 Reserved function n=9 Switch to `feature phone' mode n=A Display 5 ADC readings/sec forever AT@Hn Modem response number base Syntax: AT@Hn CML Specific Extended EV8500 AT Commands (c) 2004 CML Microsystems Plc 21 UM8500/4 CMX850 Evaluation Kit EV8500 Note all arguments to and results from these commands are in hexadecimal format. Command AT!D Description Read and write internal data memory Inspect or set the contents of the internal memory area. Syntax: AT!Daa AT!P Read and write special function memory Inspect and set the contents of the special function memory area. Syntax: AT!Paa AT!X Read and write extended data memory Inspect and set the contents of the special function memory area. Syntax: AT!Paa AT!R Reset the CMX850 software Performs a warm boot operation Syntax: AT!R AT!S Displays the current remaining stack space The result is an estimate of the peak stack usage. Syntax: AT!S AT!T Display the current RTC time value Display the current time value in the form Ddddd:Hhh:Mmm:Sss (c) 2004 CML Microsystems Plc 22 UM8500/4 CMX850 Evaluation Kit EV8500 Command AT!B Description Setup or clear a breakpoint Breakpoints are a debugging facility which is provided for simple project debugging. It does not support operation with a banked project or compiler. To setup a breakpoint (first syntax) at the specified address (aaaa), this operation overwrites the contents of bank seven of the FLASH memory and copies the contents of bank 0 with a breakpoint jump into it. Execution then resumes from bank seven until the breakpoint is reached. The command has no effect if a breakpoint is currently active. Syntax: AT!Baaaa AT!C Continue from an active breakpoint Continue from an active breakpoint, this command has no effect if a breakpoint is not active. Syntax: AT!C S-Registers The following table gives a brief description of the available S-registers and their functions. Register range, units and factory profiles are also listed. Factory profile 0 is the default at system power up. S-Register Reg S0 Range 0-255 Units Rings Description Automatic answer - This register defines the number of rings before the modem automatically answers. If the register value is zero then automatic answer is disabled. Count incoming rings - This register is readonly and indicates the number of incoming rings detected by the modem Escape character - This register defines the ASCII value of the escape character. The default value is ASCII + giving an escape sequence of +++ and a value of 128 disables the escape sequence. Carriage return character - This register defines the ASCII character used to terminate AT commands and sent at the end of response lines. Line feed character - This register defines the ASCII character accepted by the modem and used when word responses are enabled. Backspace character - This register defines the ASCII character recognised as a backspace. Wait time for blind dialing - This register defines the delay between the EV8500 going off hook and dialing the first digit of the telephone number Factory Profiles `0' `1' 0 5 S1 0-255 Rings 0 0 S2 0-128 ASCII 43 43 S3 0-127 ASCII 13 13 S4 0-127 ASCII 10 10 S5 S6 0-127 2-255 ASCII Seconds 8 2 8 2 (c) 2004 CML Microsystems Plc 23 UM8500/4 CMX850 Evaluation Kit EV8500 S-Register Reg S7 Range 1-255 Units Seconds Description Wait time for carrier after dialing - This register defines the time the modem waits for a carrier before returning on-hook Pause time for comma dial character - This register defines the time to pause for each comma (,) character found in the telephone number. Reserved Lost carrier to hang-up delay time - This register defines the time between the loss of carrier and the modem returning on-hook. This allows the modem to ignore any momentary breaks in the connection. DTMF tone duration - This register defines the duration of DTMF dialing tones and the pause between each dialled tone. Escape code guard time - The register defines the time before an escape sequence can be entered and the time between each character of the escape sequence. Reserved General options (bit assignment) - The register defines the following functions. Bit 0 - Feature Phone Mode Select, 0 run the modem in its normal operating mode, 1 run with pseudo feature phone features. Bit 1 - Echo command character, 0 Disables echoing (ATE0), 1 Enables echoing (ATE1) Bit 2 - Results code display, 0 displays results (ATQ0), 1 suppress results (ATQ1) Bit 3 - Text or numeric responses, 0 number responses (ATV0), 1 text responses (ATV1) Bit 4 - Decimal of Hex responses, 0 decimal responses (AT@H0), 1 Hex responses (AT@H1) Bit 5 - Receive auto equaliser setting, 0 disable auto equaliser (AT@ER0), 1 enable auto equaliser (AT@ER1) - see note below Bit 6 - Fixed equaliser setting, 0 enable fixed equaliser (AT@EF1), 1 disable fixed equaliser (AT@EF0) - see note below Bit 7 - Answer or originate, 0 answer (ATA), 1 originate (ATD) NOTE: For V.22 the default settings are auto equaliser off, fixed equaliser on For V.22bis the default settings are auto equaliser on, fixed equaliser on Otherwise the default settings are auto equaliser off, fixed equaliser off Factory Profiles `0' `1' 50 50 S8 0-255 Seconds 2 2 S9 S10 0-255 1-255 n/a 100ms 0 7 0 7 S11 5-255 10ms 10 20 S12 0-255 50ms 20 20 S13 S14 0-255 0-255 n/a n/a 0 138 0x8A 0 128 0x80 (c) 2004 CML Microsystems Plc 24 UM8500/4 CMX850 Evaluation Kit EV8500 S-Register Reg S15 Range 0-7 Units n/a Description CLI Type II Window - This register defines the CLI CAS tone detection window where: 0 = 65-100ms 1 = 65-105ms 2 = 65-110ms 3 = 65-115ms 4 = 65-120ms 5 = 65-125ms 6 = 65-130ms 7 = 65-135ms Reserved Reserved Modem handshake timeout - This register defines the time before an answering modem aborts a handshaking action. Reserved Reserved Bit error rate test setup (bit assignment) - Bit 2,1,0 - Duration of test where the value selected gives 10En (1-10,000,000) bits (AT@Bn) Bit 7-3 - Start delay in seconds (0-31) Calling characteristics - This register defines the calling characteristics of the modem where 0=ATX0 and 1=ATX1 Guard tone setting - This register defines the guard tone setting where: 0 = None (AT&G0) 1 = 550Hz (AT&G1) 2 = 1800Hz (AT&G2) Crystal selection - This register defines the CMX850 main crystal frequency, 0 12.2880MHz (AT@X0), 1 11.0592MHz (AT@X1) Transmitter setup (bit assignment) - Bit 2,1,0 - Transmit attenuation setting where: 0 (000) = -10.5 dB 1 (001) = -9.0 dB 2 (010) = -7.5 dB 3 (011) = -6.0 dB 4 (100) = -4.5 dB 5 (101) = -3.0 dB 6 (110) = -1.5 dB 7 (111) = 0.0 dB Bit 3 Stop bit setting where: 0 is one stop bit and 1 is two stop bits Bit 5,4 - Data bits setting where: 0 (00) = 5 data bits 1 (01) = 6 data bits 2 (10) = 7 data bits 3 (11) = 8 data bits Factory Profiles `0' `1' 0 0 S16 S17 S18 0-255 0-255 0-255 n/a n/a Seconds 0 0 30 0 0 30 S19 S20 S21 0-255 0-255 0-255 n/a n/a n/a 0 0 5 0 0 5 S22 0-1 n/a 1 0 S23 0-2 n/a 0 0 S24 0-1 n/a 1 1 S25 0-255 n/a 183 0xB7 176 0xB0 (c) 2004 CML Microsystems Plc 25 UM8500/4 CMX850 Evaluation Kit EV8500 S-Register Reg Range Units Bit Description 7,6 - Start-stop mode where: 0 (00) = Odd parity 1 (01) = Even parity 2 (10) = No parity Receiver setup (bit assignment) - Bit 2,1,0 - Receive attenuation setting, as S25 Bit 3 Stop bit setting, as S25 Bit 5,4 - Data bits setting, as S25 Bit 7,6 - Overspeed setting where: 0 (00) = 2.3 % overspeed 1 (01) = 1.0% overspeed 2 (10) = No overspeed Communication standard - This register defines the modems communication standard where values 0 to 9 are selected by ATB0-9 Reserved Reserved Factory Profiles `0' `1' S26 0-255 n/a 183 0xB7 176 0xB0 S27 0-9 n/a 0 0 S28 S29 0-255 0-255 n/a n/a 0 0 0 0 Modem Result Codes Numeric Response (Decimal) 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 AT Command Summary 1) The maximum command length is 47 characters, excluding the AT prefix and carriage return. 2) A user defined escape sequence (defaulted to +++) is required to revert the modem from on-line (data transfer mode) to AT command mode, to allow the user to issue AT commands. 3) Every command except for A/ and the escape sequence must begin with the AT prefix and be completed with a carriage return. 4) Commands which are not fully implemented will return the result code `NYI' (Not Yet Implemented). 5) Do not send AT commands to the Evaluation Kit until the previous result code (if enabled) has been received. Alpha Response OK CONNECT RING NO CARRIER ERROR NO DIAL TONE BUSY CONNECT 2400 CONNECT 1200 CONNECT 600 CONNECT 300 CONNECT 1200/75 CONNECT 75/1200 CONNECT 1200/150 CONNECT 150/1200 NYI (c) 2004 CML Microsystems Plc 26 UM8500/4 CMX850 Evaluation Kit EV8500 6.4 Terminal Emulator Users will need to run a suitable terminal emulator on their PC in order to communicate with the CMX850 on the Evaluation Kit. `Hyper Terminal', which is supplied with the Windows operating systems, is suitable for this purpose. Hyper Terminal Setup Emulation: Character Set: ASCII Sending: ASCII Receiving: COM Port Settings: VT100 ASCII Echo typed characters locally. (Enable if modem not echoing) Wrap lines that exceed terminal width. Bits per second: Data bits: Parity: Stop bits: Flow Control: 19,200 8 None 1 Hardware (or None, see note) Note: The flow control can be set to none and still allow communication with the CMX850 evaluation board but buffer overrun problems may occur in data transfer mode. 6.5 Compiling new firmware with the Keil compiler The EV8500 evaluation kit comes complete with the full firmware source code. This code is produced and compiled using the Keil complier version 6.02 (not supplied as part of this kit). The Keil project files for the firmware are also included with the source code. The Keil target options (Project menu, Options for Target) are default except for the following: Target tab: Xtal frequency 11.0592MHz, Memory Model; Compact, Code ROM size; Large, Off chip code memory; 0-10000, Off chip XDATA memory; 0-10000. A51 tab: Macro processor; Standard and MPL checked. The EV8500 contains hardware to support code banking and the evaluation code is by default configured to support this. To enable code banking support in your project include the modified L51_bank.asm source file and set the following compiler options: Target tab: Code banking checked, Banks; 8, Bank area; 0-FFFF. A51 tab (for L51_bank.asm only): Macro processor; MPL unchecked. Note that the breakpoint AT commands AT!B and AT!C are provided with the standard firmware but cannot be used with the code banking scheme active. To use the breakpoint commands the standard firmware must be complied with banking removed (see settings above) and download to the EV8500. 6.6 Reprogramming the FLASH ROM The EV8500 board supports in-situ programming of the onboard FLASH memory using the serial interface and internal BootROM. To enter FLASH programming mode remove the power from the EV8500 board and close jumper JP5. Connect the serial interface (J5) to a PC able to run the FLASH programming application (ESFLASH_xx.EXE) and reconnect the power to the EV8500 board. The FLASH programming application is provided to allow the user to download new program data to the FLASH memory on the EV8500 board. To program the FLASH memory on an EV8500 board enter FLASH programming mode as described above. (c) 2004 CML Microsystems Plc 27 UM8500/4 CMX850 Evaluation Kit EV8500 Start the FLASH programming application and select a "Target type selection" of "EV8500 Evaluation board". Click "Load File" and select a "fat stub download" HEX file which matches the flash memory type fitted to the attached EV8500 evaluation board. (The board is normally fitted with AM29LV040B 70ns FLASH memory). Click "Load File" and select the required FLASH data download file or files. The Keil compiler suite produces multiple files for code banked projects with the file extension ".Hnn". Selecting a file with the extension .H00 automatically loads the other banked files with the same name. Each .Hnn file will be loaded into the code bank specified by the numeric value in the files extension e.g. .H03 would be loaded into code bank three. Select the PC communications resource which is connected to the EV8500 evaluation board. Press the "Program FLASH" button to start the download sequence to the EV8500 evaluation board. The dialog controls will be greyed and a progress counter will start. If the program prompts with the message "Automatically include `thin' stub code bank in 1 ?" then click the No button. The first pass of the progress counter is the download of the `fat' stub to control access to the FLASH memory. The second pass of the progress bar is the download of the FLASH program data. Once both passes of the progress bar are complete the EV8500 FLASH application will inform the user that the download is complete. 6.7 Negotiation and Data Transfer During modem negotiation (handshaking) and data transfer mode the user can revert to on-line AT command mode by typing the escape code sequence (+++). The escape code guard time (based on S12) must have expired to successfully access this mode. Whilst in on-line AT command mode the board to remote modem connection may be aborted by typing ATH0 (instructs modem to go on-hook). Alternatively the user can enter relevant AT commands or return to data transfer mode by using the ATO command. The firmware only supports asynchronous data transfer. Receiver USART overspeed settings specified in S-Register, S26, only apply to DPSK/QAM operating modes. Transmitter Guard Tone settings specified in S-Register, S23, only apply to DPSK/QAM answering modes. If the carrier is lost (during data transfer) or negotiation is aborted by the user, the firmware will send the General Reset Command to the CMX850 device modem section. This action will cause the EV8500 demonstration board to hang up. The data transfer firmware does not contain any retrain code. This process is sometimes performed by modems when signal distortion or line noise is detected which may threaten data integrity. The receive auto equalizer function can be enabled via the S24 register. This S24 register setting only applies to DPSK modes of operation. The EV8500 firmware for V.22 bis always enables the receive auto equalizer half way through the negotiation phase. (c) 2004 CML Microsystems Plc 28 UM8500/4 CMX850 Evaluation Kit EV8500 6.8 Troubleshooting Care must be taken to get the correct settings for address and data multiplexing using JP1 and JP5 to JP7. If JP1 is shorted then JP5 to JP7 must be open to allow correct non-multiplexed operation and the firmware modified to support this mode of operation. Some terminal emulators have been found not to support full hardware flow control when transferring text files. This could result in data loss when using this facility. If this problem is experienced users should try using a different terminal emulator To ensure successful negotiation and data transfer between the EV8500 and third party modems, users should ensure their third party modem is configured to the correct protocol (see third party AT command documentation). Note that any sudden loss of the 2-wire line during data transfer will result in loss of carrier and therefore the demonstration board will hang up and display the NO CARRIER message. However, due to the lost carrier to hang up delay (S10), a short burst of corrupt characters (noise generated) will be observed on the HyperTerminal window before the NO CARRIER message is displayed. These corrupt characters can sometimes match control characters and therefore modify HyperTerminal's behaviour. The user is advised to restart HyperTerminal if this happens. (c) 2004 CML Microsystems Plc 29 UM8500/4 CMX850 Evaluation Kit EV8500 7. 7.1 Performance Specification Electrical Performance 7.1.1 Absolute Maximum Ratings Exceeding these maximum ratings can result in damage to the Evaluation Kit. Min. -0.3 -0.3 0 -20 -10 +10 Max. 3.9 VDD + 0.3 +1.5 +20 +70 +35 Units V V A mA C C Supply (VDD - VSS) Voltage on any connector pin to VSS Current into or out of VIN and VSS pins Current into or out of any other connector pin Storage Temperature Operating Temperature 7.1.2 Operating Limits Correct operation of the Evaluation Kit outside these limits is not implied. Notes Supply (VDD - VSS) Operating Temperature 7.1.3 Operating Characteristics For the following conditions unless otherwise specified: Evaluation Device Xtal Frequency = 11.0592MHz or 12.288MHz 0.01% (100ppm) VDD = 3.3V, Tamb = +25C. Notes DC Parameters IDD ((evaluation board - idle)) Notes: 1. Hook relay off. 1 Min. Typ. 100 Max. Units mA Min. 3.0 +10 Max. 3.6 +35 Units V C (c) 2004 CML Microsystems Plc 30 UM8500/4 CMX850 Evaluation Kit EV8500 CML does not assume any responsibility for the use of any circuitry described. No IPR or circuit patent licences are implied. CML reserves the right at any time without notice to change the said circuitry and any part of this product specification. Evaluation kits and demonstration boards are supplied for the sole purpose of demonstrating the operation of CML products and are supplied without warranty. They are intended for use in a laboratory environment only and are not for re-sale, end-use or incorporation into other equipments. Operation of these kits and boards outside a laboratory environment is not permitted within the European Community. All software/firmware is supplied "as is" and is without warranty. It forms part of the product supplied and is licensed for use only with this product, for the purpose of demonstrating the operation of CML products. Whilst all reasonable efforts are made to ensure that software/firmware contained in this product is virus free, CML accepts no resonsibility whatsoever for any contamination which results from using this product and the onus for checking that the software/firmware is virus free is placed on the purchaser of this evaluation kit or development board. www.cmlmicro.com For FAQs see: www.cmlmicro.com/products/faqs/ For a full data sheet listing see: www.cmlmicro.com/products/datasheets/download.htm For detailed application notes: www.cmlmicro.com/products/applications/ CML Microcircuits (UK ) Ltd CML Microcircuits (USA) Inc. 4800 Bethania Station Road, Winston-Salem, NC 27105 - USA. CML Microcircuits (Singapore)Pte Ltd COMMUNICATION SEMICONDUCTORS Oval Park, Langford, Maldon, Essex, CM9 6WG - England. No 2 Kallang Pudding Road, #09 to 05/06 Mactech Industrial Building, Singapore 349307 No. 218, Tian Mu Road West, Tower 1, Unit 1008, Shanghai Kerry Everbright City, Zhabei, Shanghai 200070, China. Tel: +86 21 6317 4107 +86 21 6317 8916 Fax: +86 21 6317 0243 Sales: cn.sales@cmlmicro.com.cn Technical Support: sg.techsupport@cmlmicro.com Tel: +44 (0)1621 875500 Fax: +44 (0)1621 875600 Sales: sales@cmlmicro.com Technical Support: techsupport@cmlmicro.com Tel: +1 336 744 5050, 800 638 5577 Fax: +1 336 744 5054 Sales: us.sales@cmlmicro.com Technical Support: us.techsupport@cmlmicro.com Tel: +65 6745 0426 Fax: +65 6745 2917 Sales: sg.sales@cmlmicro.com Technical Support: sg.techsupport@cmlmicro.com |
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