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| CMX208 ISDN Dual Telephony Protocol Engine D/208/1 October 1999 Advance Information Features * * * * * Applications * * * * * Supports Incoming and Outgoing Calls Independent Port Configuration Flexible B-channel Mapping Supports CTR3 Approval Full API Available Feature Phones Pay-Phones PABX Telephones DECT Cordless Phones Reference Designs Available 1.1 Brief Description The CMX208 is an ISDN telephony protocol engine which implements the lower level ISDN interface and communicates with the CMX605 and other standard devices to form a fully integrated ISDN chipset for voice communications. The CMX208 puts all the main data processing elements in a single device. No ISDN software has to be written and simple `Plug and Play' design results. This reduces development time and provides a highly cost-effective hardware solution. By using proven circuit designs, the designer can move quickly from initial concept through design in to manufacture. The CMX208 supports two voice ports over the ISDN line, which can be used to provide ISDN telephony services or POTS line interfaces, and has independent keypad-configuration of these services for each port. The CMX208's feature set and architecture allow most analogue systems to be converted to an ISDN equivalent with enhanced features. The CMX208 is designed to work with the AMD 79C30 S/T bus interface, the Motorola MC145480 PCM codec and the CML CMX605 POTS interface circuit, and also comes complete with embedded applications software. To support the CMX208, CML can also provide licensed reference designs on user request. A flexible Applications Program Interface (API) allows users to customise the features and operation of their own design. The CMX208 comes in a compact 80-pin surface mount package. (c) 1999 Consumer Microcircuits Limited (c) 1999 Chiron Technology Limited ISDN Dual Telephony Protocol Engine CMX208 CONTENTS Section Page 1.0 Features and Applications .........................................................................1 1.1 Brief Description.........................................................................................1 1.2 Block Diagram ............................................................................................3 1.3 Signal List ...................................................................................................4 1.4 External Components.................................................................................8 1.5 General Description....................................................................................9 1.5.1 Glossary ....................................................................................10 1.5.2 Initialisation...............................................................................11 1.5.3 ISDN Interface............................................................................11 1.5.3.1 Activation.....................................................................11 1.5.3.2 De-activation or Line Disconnection .............................11 1.5.3.3 Line Failure Detection ..................................................11 1.5.3.4 Incoming Calls .............................................................11 1.5.3.5 Multiple Subscriber Numbering.....................................12 1.5.3.6 Channel Mapping.........................................................12 1.5.4 POTS Configuration..................................................................13 1.5.4.1 Configuration and Control via DTMF Keypad................13 1.5.5 POTS Operation ........................................................................15 1.5.5.1 Keypad Operation ........................................................15 1.5.5.2 Incoming POTS Calls...................................................15 1.5.5.3 Outgoing POTS Calls...................................................15 1.5.5.4 Connected Calls...........................................................16 1.5.5.5 Call Clearing ................................................................16 1.5.6 Application Programmer's Interface ........................................17 1.5.7 Hardware Description ...............................................................17 1.5.7.1 LED Status Indicators (LED1 to LED9, and ILFI)..........17 1.6 Application Notes .....................................................................................18 1.6.1 General ......................................................................................18 1.6.2 Approvals ..................................................................................18 1.7 Performance Specification.......................................................................19 1.7.1 Electrical Performance..............................................................19 1.7.1.1 Absolute Maximum Ratings..........................................19 1.7.1.2 Operating Limits...........................................................19 1.7.1.3 Operating Characteristics.............................................20 1.7.2 Packaging..................................................................................25 Note: This product is in development: Changes and additions will be made to this specification. Items marked TBD or left blank will be included in later issues. Information in this data sheet should not be relied upon for final product design. (c) 1999 Consumer Microcircuits Limited (c) 1999 Chiron Technology Limited 2 D/208/1 ISDN Dual Telephony Protocol Engine CMX208 1.2 Block Diagram Figure 1 Block Diagram (c) 1999 Consumer Microcircuits Limited (c) 1999 Chiron Technology Limited 3 D/208/1 ISDN Dual Telephony Protocol Engine CMX208 1.3 Signal List S1 Package 80QFP 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 27 28 Signal Description Name SCL SDA ISDNRST N/C N/C N/C RSTN DVDD1 XTALN XTAL DVSS1 LED1 LED2 N/C LED4 N/C N/C N/C LED8 STN LED9 WRN RDN A19 A18 A17 A16 A15 Type O/P BI O/P O/P O/P O/P I/P Power O/P I/P Power O/P O/P O/P O/P O/P O/P O/P O/P O/P O/P O/P O/P O/P O/P O/P O/P O/P EEPROM - Serial Clock EEPROM - Serial Data ISDN S-interface Chip Reset Do not make any connection to this pin Do not make any connection to this pin Do not make any connection to this pin CMX208 Chip Reset (active low) The digital positive supply rail. Levels and voltages are dependent upon this supply. This pin should be decoupled to DVSS by a capacitor The output of the on-chip Xtal oscillator inverter The input to the oscillator inverter from the Xtal circuit The digital negative supply rail (ground) POTS Port 1 Off-Hook Indicator (HK1) POTS Port 2 Off-Hook Indicator (HK2) Do not make any connection to this pin POTS Port 2 Call Connected Indicator (CN2) Do not make any connection to this pin Do not make any connection to this pin Do not make any connection to this pin ISDN Line Activated Indicator (AR) Watchdog Timer Stimulus POTS Port 1 Call Connected Indicator (CN1) Memory Write Access Strobe Memory Read Access Strobe Memory and Peripheral Address Bus Memory and Peripheral Address Bus Memory and Peripheral Address Bus Memory and Peripheral Address Bus Memory and Peripheral Address Bus (c) 1999 Consumer Microcircuits Limited (c) 1999 Chiron Technology Limited 4 D/208/1 ISDN Dual Telephony Protocol Engine CMX208 S1 Package 80QFP Pin No. 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 Signal Description Name A14 A13 A12 A11 A10 A9 A8 A/D7 A/D6 A/D5 A/D4 A/D3 A/D2 A/D1 A/D0 ASTB DVSS0 ~ N/C RINGP2 RINGN2 API-RXD API-TXD CLIP2 B1/B2N ILFI DVDD0 Type O/P O/P O/P O/P O/P O/P O/P BI BI BI BI BI BI BI BI O/P Power I/P O/P O/P O/P I/P O/P O/P O/P O/P Power Memory and Peripheral Address Bus Memory and Peripheral Address Bus Memory and Peripheral Address Bus Memory and Peripheral Address Bus Memory and Peripheral Address Bus Memory and Peripheral Address Bus Memory and Peripheral Address Bus Memory and Peripheral Address and Data Bus Memory and Peripheral Address and Data Bus Memory and Peripheral Address and Data Bus Memory and Peripheral Address and Data Bus Memory and Peripheral Address and Data Bus Memory and Peripheral Address and Data Bus Memory and Peripheral Address and Data Bus Memory and Peripheral Address and Data Bus Address/Data Bus Strobe (data bus selected if low) The digital negative supply rail (ground) For manufacturer's use only. Connect to DVSS directly Do not make any connection to this pin POTS Port 2 Ringing Generator (low when not ringing) POTS Port 2 Ringing Generator (high when not ringing) API/RS232 Port Rx Data (inactive = high) API/RS232 Port Tx Data (high when inactive) POTS Port 2 Line Voltage Adjustment (low if sending FSK to a Caller Display unit, as it is intended to make the SLIC present a high impedance to the POTS line) B-channel Select (high selects channel B1). ISDN Line Failure Indicator The digital positive supply rail. Levels and voltages are dependent upon this supply. This pin should be decoupled to DVSS by a capacitor (c) 1999 Consumer Microcircuits Limited (c) 1999 Chiron Technology Limited 5 D/208/1 ISDN Dual Telephony Protocol Engine CMX208 S1 Package 80QFP Pin No. 56 57 58 Signal Description Name RINGP1 RINGN1 CLIP1 Type O/P O/P O/P POTS Port 1 Ringing Generator (low when not ringing) POTS Port 1 Ringing Generator (high when not ringing) POTS Port 1 Line Voltage Adjustment (low if sending FSK to a Caller Display unit, as it is intended to make the SLIC present a high impedance to the POTS line) POTS Port 1 Hook Switch Status Detector (on-hook = low) POTS Port 2 Hook Switch Status Detector (on-hook = low) CMX605 C-BUS Interface - Reply Data CMX605 C-BUS Interface - Command Data CMX605 C-BUS Interface - Serial Clock The positive analogue supply rail. Levels and voltages are dependent upon this supply. This pin should be decoupled to AVSS by a capacitor A/D Reference Voltage. Connect to AVDD directly The negative analogue supply rail (ground) CMX605 C-BUS Interface (chip select POTS Port 1) CMX605 C-BUS Interface (chip select POTS Port 2) D/A Reference Voltage. Connect to AVDD directly D/A Reference Voltage. Connect to AVSS directly For manufacturer's use only. Connect to DVSS directly API Interrupt (inactive = high) CMX605 C-BUS Interface - Interrupt (inactive = high) For manufacturer's use only. Connect to DVSS directly For manufacturer's use only. Connect to DVSS directly For manufacturer's use only. Connect to DVSS directly ISDN S-interface Chip Interrupt 59 60 61 62 63 64 ILINE1 ILINE2 REPLY CMDDATA SER-CLK AVDD AVREF1 AVSS CSN1 CSN2 AVREF2 AVREF3 NMI API-INT IRQN ~ I/P I/P I/P O/P O/P Power 65 66 67 68 69 70 71 72 73 74 75 76 77 Power Power O/P O/P Power Power I/P I/P I/P I/P I/P I/P I/P ISDNINT (c) 1999 Consumer Microcircuits Limited (c) 1999 Chiron Technology Limited 6 D/208/1 ISDN Dual Telephony Protocol Engine CMX208 S1 Package 80QFP Pin No. 78 79 80 Signal Description Name Type I/P I/P O/P For manufacturer's use only. Connect to DVSS directly For manufacturer's use only. Connect to DVSS directly Do not make any connection to this pin N/C Notes: I/P = O/P = BI = Input Output Bidirectional (c) 1999 Consumer Microcircuits Limited (c) 1999 Chiron Technology Limited 7 D/208/1 ISDN Dual Telephony Protocol Engine CMX208 1.4 External Components Note: This product is to be used as part of a chip-set. Please refer to the Applications Section (section 1.6) for details of the recommended chip-set. Figure 2 CMX208 Pinout (c) 1999 Consumer Microcircuits Limited (c) 1999 Chiron Technology Limited 8 D/208/1 ISDN Dual Telephony Protocol Engine CMX208 1.5 General Description The CMX208 is a single-chip data processor which has been mask programmed with firmware to implement an ISDN protocol stack. This enables the CMX208 to provide two analogue (POTS) ports with an ISDN S-bus network connection. Key variables are stored in an external EEPROM and the user can provide additional features by adding external ROM and RAM. Access to the firmware Application Programmer's Interface (API) facilitates the seamless integration of the user's additional features with the pre-programmed ISDN to POTS interfaces. The CMX208 is intended for use as part of an ISDN chipset and all descriptions in this data sheet refer to this implementation, which is shown diagrammatically in Figure 3. The use of alternative chipsets is not supported. The firmware supports connection to an ISDN S-bus network interface via the AMD AM79C30 ST controller with integral PCM codec for a single POTS port. An auxiliary Motorola MC145480 PCM codec will need to be added for the second POTS port. The CMX208 interfaces with up to two CMX605 Tone Generator and DTMF Receiver chips, which decode incoming DTMF tones and generate call progress signals (eg busy tone) normally originating from an analogue telephone exchange. The firmware translates the CMX605 data into ISDN Dchannel commands and vice versa to support both incoming and outgoing calls. For the ISDN interface, D-channel commands sufficient for standard telephony applications are implemented. With the aid of a small amount of discrete circuitry, exchange battery voltage, ringing current, line reversal and off-hook detection are also supported, to complete the POTS interface. The CMX208 has dedicated outputs for visible indicators (LEDs) which can be used to provide information on the call status. Support for Multiple Subscriber Numbering is also included in the firmware. The CMX208 can be configured by means of keypad programming via either POTS port. Configuration parameters allow the user to change (for example) the format and cadence of the ringing signal, so as to facilitate use of the CMX208 in different countries. Each POTS interface is able to configure the variables relevant to its own use. An Application Programmer's Interface (API) is available and is described separately in section 1.5.6. Further details are available on completion of a Non-Disclosure Agreement. Please contact CML Sales directly for further details. The firmware and finite state machine embedded in the CMX208 have been used in products which have gained ETSI CTR3 approval. (c) 1999 Consumer Microcircuits Limited (c) 1999 Chiron Technology Limited 9 D/208/1 ISDN Dual Telephony Protocol Engine CMX208 1.5.1 Glossary ACCM API CIDCW CLI CRC CTS DCD DDI DTE DTMF DTR HDLC IA5 IE ILFI ISDN LAPB LAPD LCGN LED LLI MFO MSN NU NUA NUI PAD PC PCM POTS PPP PVC RI RNR RR RTS SABM SABME SLIC SPM SVC TEI Asynchronous Control Character Map Application Programmer's Interface Caller Identification During Call Waiting Calling Line Identification Cyclic Redundancy Check Clear to Send Data Carrier Detect Direct Dialling Inwards Data Terminal Equipment Dual Tone Multiple Frequency Data Terminal Ready High Level Data Link Control International Alphabet No 5 Information Element ISDN Line Failure Indicator Integrated Services Digital Network Link Access Procedure - Balanced Link Access Procedure on the D-Channel Logical Channel Group Number Light Emitting Diode Logical Link Identifier Multiple Frame Operation Multiple Subscriber Numbering Number Unobtainable Network User Address Network User Identification Packet Assembler/Disassembler Personal Computer Pulse Code Modulation Plain Old (Analogue) Telephone Service Point to Point Protocol Permanent Virtual Circuit Ring Indication Receiver Not Ready Receiver Ready Ready to Send Set Asynchronous Balanced Mode Set Asynchronous Balanced Mode Extended Subscriber Line Interface Circuit Subscriber Pulse Metering Switched Virtual Circuit Terminal Endpoint Identifier (c) 1999 Consumer Microcircuits Limited (c) 1999 Chiron Technology Limited 10 D/208/1 ISDN Dual Telephony Protocol Engine CMX208 1.5.2 Initialisation On power-up, the CMX208 assumes its default values, which are factory programmed into the firmware. It then performs a self-test, during which all of the LED pins and the ILFI pin are held high for 3s. If the test is unsuccessful, the CMX208 remains in this condition. If the test is successful, the CMX208 reads its preset values from the attached EEPROM and examines the state of the ISDN link (ie Layer 1) before commencing normal operation. On power-up, the ISDN link is de-activated, the POTS ports are assumed to be on-hook and ringing is disabled. 1.5.3 ISDN Interface Two simultaneous voice calls are possible. Incoming calls are firstly checked for other calls present, then the MSN is checked for validity, then the channel mapping, so that responses will be handled accordingly. When channel mapping is enabled, outgoing calls will request the channel enabled. When not enabled, a request for any channel is made. If no free channels are available for outgoing calls, a locally generated busy tone is returned to the analogue port. 1.5.3.1 Activation Activation occurs in the following circumstances: * * The ISDN network activates. The device connected to the analogue port goes off hook. The Terminal Endpoint Identifier (TEI) is negotiated. Line powering of the CMX208 is not supported. The 'AR' indicator (LED8) toggles between high and low states when the CMX208 is powered up, and remains constantly low once the CMX208 identifies an activated ISDN line. ISDN line power detection is not implemented and the CMX208 will negotiate a new TEI on any new network activation. 1.5.3.2 De-activation or Line Disconnection De-activation or line disconnection causes the TEI to be removed. Upon re-connection the CMX208 will only be re-activated and request a new TEI when one of the conditions in the above section is met. 1.5.3.3 Line Failure Detection If the line failure detection parameter is enabled (via either POTS port) the CMX208 will check that Layer 2 communications are active every sample period of 30 seconds. If Layer 2 communications are not active, the CMX208 will attempt to activate them. If they remain inactive for 2 sample periods, the line is deemed to have failed, so then the ILFI pin is set high and both RINGP1 and RINGN1 pins (port 1 only) are set low. The CMX208 continues to attempt to activate the line and if it becomes active and stays active for 2 sample periods, then the ILFI pin is set low and both RINGP1 and RINGN1 pins (port 1 only) are restored to their default settings. 1.5.3.4 Incoming Calls Incoming voice calls and calls from analogue lines are directed to the analogue ports and all other incoming calls are rejected with a Cause Information Element set to 'Incompatible Destination'. (c) 1999 Consumer Microcircuits Limited (c) 1999 Chiron Technology Limited 11 D/208/1 ISDN Dual Telephony Protocol Engine CMX208 1.5.3.5 Multiple Subscriber Numbering Multiple Subscriber Numbering (MSN) enables each POTS port of the CMX208 to have its own telephone number. Up to 23 digits can be saved as the MSN for each port. All incoming SETUP messages will be checked for the presence of a Called Party Number Information Element (IE). If one is present it is compared with the saved MSN number (if present), starting with the last digit of both numbers. Comparison continues until there are no more numbers in the MSN saved number or the incoming Called Party Number or there is a difference between the numbers. The MSN is said to match if the saved MSN and the incoming calls' Called Party Number are the same for the duration of the shorter number (ie if the digit `1' is saved and the received Called Party Number is 654321, then the MSN matches). If there is no saved MSN, the Called Party Number is ignored and call processing continues. When there is a saved MSN and the Calling Party Number transmit is enabled, all outgoing call SETUP messages will contain a Calling Party Number Information Element. Note 1: When a CMX208 with MSN saved and Calling Party Number transmit enabled is connected to some exchanges, no dial tone is heard when going off-hook. Note 2: Disabling the Calling Party Number transmit will mean that the called party may not receive the Calling Line Identification (CLI), or if they do receive a CLI it will probably be the base number and not the number specific to the calling telephone. 1.5.3.6 Channel Mapping It is possible to configure the CMX208 so that the analogue ports will only originate calls to and respond to calls from a specific ISDN B-channel. This is a useful feature if, for example, you wish to have a hunt group on your ISDN line (ie to select the next available channel) and only want one voice port to ring on an incoming call. (c) 1999 Consumer Microcircuits Limited (c) 1999 Chiron Technology Limited 12 D/208/1 ISDN Dual Telephony Protocol Engine CMX208 1.5.4 POTS Configuration 1.5.4.1 Configuration and Control via DTMF Keypad Configuration can be carried out at any time by causing the POTS port to go off-hook and then immediately entering a configuration sequence of DTMF tones. The sequence signalled to the CMX208 will determine the configuration to be performed, as shown in the following table. Configuration Sequence S02S# # Name Test watchdog Description Puts the CMX208 into a permanent loop, not updating the external watchdog counter, so after 2s it should reset. Inhibits CLI delivery on the analogue POTS port Configures modem standard to be used for CLI delivery. n = alert mode 0 = FSK follows ring burst as per ETS 300 659-1 para. 6.1.1 1 = FSK follows dual tone alert as per ETS300 659-1 para. 6.1.2.a 2 = FSK follows ringing pulse alert as per ETSI 300 659-1 para. 6.1.2.b 3 = FSK follows line reversal and tone alert as per ETSI 300 659-1 para. 6.1.2.c and BT SIN227. Configures modem standard to be used for CLI delivery. FSK follows ring burst as per Bellcore GR-30-CORE and SR-TSV-002476 Clears any saved digits n = MSN (up to 23 digits) Country code is set to UK by default n = country code 0 = UK 1 = Belgium 2 = Rest of Europe Incoming calls on any channel are accepted (provided other parameters are valid eg MSN). Where n = 1 or 2 for the appropriate channel. Disabled Default n/a S81S# # S81S1n# # Disable CLI delivery on port Use V23 FSK for CLI delivery n/a S81S2# # Use Bell 202 FSK for CLI delivery Disabled n/a Clear n/a UK S90S# # S90Sn# # S93S# # S93Sn# # Clear MSN Save Multiple Subscriber Number (MSN) Clear country code Change country code S94S# # Clear channel mapping n/a No channel map S94Sn# # Enable channel mapping (c) 1999 Consumer Microcircuits Limited (c) 1999 Chiron Technology Limited 13 D/208/1 ISDN Dual Telephony Protocol Engine CMX208 Configuration Sequence S95S# # S95S1# # Name Disable Calling Party No. transmit Enable Calling Party No. transmit Description Outgoing call SETUP messages do not contain any Calling Party Number Information Elements. Outgoing call SETUP messages contain Calling Party Number Information Element with number set to saved MSN (if a number is present). Prevents digits being transmitted to the POTS port upon call connection. Upon connection of a call on POTS port 1 only, if there was a Called Party Number Information Element present in the incoming call setup message, the digits are sent as DTMF tones to the POTS port. Once the CMX208 is de-activated it stays de-activated until the network reactivates it or an outgoing call needs to be made. The CMX208 checks to see if the ISDN line is activated and Layer 2 communications can be made. It then sets the ILFI pin accordingly. Resets all of the configuration variables back to their default values. Default n/a Enabled S96S# # S96S1# # Disable DDI transmit Enable DDI transmit n/a Disabled S97S# # Disable line failure detection n/a S97S1# # Enable line failure detection Disabled S9SS1234567890# # Initialise all configurations. n/a Of the above configurations, MSN and Channel Mapping are saved on a per port basis. The rest are saved on a system-wide basis, the last details entered at either port being the configuration saved. The extent to which full CLI information is delivered to the POTS port will depend upon the CLI facilities which have been implemented on the ISDN network. Once the `S' has been recognised, each digit pressed is then checked for validity as a configuration sequence. If any digit pressed is not a valid configuration digit, all digits pressed so far will be # transmitted to the network in INFORMATION messages as Keypad Information Elements, until a `#' is # entered (with the exception of `S#' being entered, see Keypad Operation below). If the first four digits received are a valid configuration sequence then the configuration mode is entered. When a valid configuration has been completed the CMX208 will send a single DTMF tone to the POTS port. If a valid configuration sequence is received but subsequent digits are invalid, then subsequent digits entered will be ignored and two DTMF tones will be sent to the POTS port. If the port goes on-hook part way through configuration, it will cause any digits received so far to be ignored. Configurations can be performed consecutively with the exception of the test function (where the attached handset must be replaced immediately after the configuration has been audibly signalled to the POTS port). All configurations entered will be retained after a power-down as they are stored in the external EEPROM. (c) 1999 Consumer Microcircuits Limited (c) 1999 Chiron Technology Limited 14 D/208/1 ISDN Dual Telephony Protocol Engine CMX208 1.5.5 POTS Operation 1.5.5.1 Keypad Operation The CMX208 supports ISDN keypad messages for control of Network Supplementary services either before or during call establishment. When dialling a number (ie off-hook and dial tone audible on POTS port), or if a call has been disconnected by the network but the POTS port has not yet gone onhook, any keypad string entered will be sent to the network as `Keypad Information Elements' within INFORMATION messages. Keypad strings are defined as the following sequences of digits, with the exception of the configuration strings defined in the previous section: S...# # S#...# ## #...# # When a call is connected, pressing the recall key results in all subsequent key presses being sent to the network as `Keypad Information Elements' within INFORMATION messages, until the handset is replaced. The tones generated by the key presses are also passed down the B-channel, so the remote user will be able to hear them. 1.5.5.2 Incoming POTS Calls An incoming POTS call is identified by the Bearer Capability Information Element of the SETUP message being set to `Speech' or `3.1 kHz Audio'. The call will be routed to either (or both) of the POTS ports which satisfy the following three conditions: * The port is on-hook. * The MSN saved for the port matches the Called Number in the incoming SETUP message, or no MSN is specified for the port, or there is no Called Number in the SETUP message. See section 1.5.3.5 for details of POTS port MSN selection. * The ISDN B-channel on which the call is placed (as indicated in the SETUP message) is compatible with the channel mapping configuration for the port. See section 1.5.3.6 for details of POTS port channel mapping selection. When the call is routed to a port, the ringing signal for that port will be applied by means of the RINGP1 and RINGN1 (or RINGP2 and RINGN2) pins. The call is answered when either of the ports with ringing signal goes off-hook. The ringing signal is then stopped and the ISDN call is connected to that port. 1.5.5.3 Outgoing POTS Calls Outgoing calls are initiated when a POTS port goes off-hook. An ISDN SETUP message is sent to the network with the Bearer Capability Information Element set to 'Speech'. The dial tone presented by the network on that ISDN B-channel which was selected by channel mapping (see section 1.5.3.6), will be routed to the POTS port initiating the call. When DTMF tones are received from the POTS port, they are sent to the network either as Called Party Number or Keypad Information Elements. Keypad Information Elements are discussed in section 1.5.5.1. Receipt of a valid DTMF tone will prompt its conversion to IA5 coded digits, as shown in the following table (IA5 hex digits are in brackets). If the first valid digit to be received is a `S' then the configuration mode is entered and subsequent digits will be monitored and saved as indicated in section 1.5.4.1. If # the first tone received is not a `S' or `#' (see section 1.5.5.1) that digit and all subsequent digits will be passed to the network in an INFORMATION message as a Called Party Number Information Element. (c) 1999 Consumer Microcircuits Limited (c) 1999 Chiron Technology Limited 15 D/208/1 ISDN Dual Telephony Protocol Engine CMX208 Digits received before the network has returned the SETUP ACK message are saved. Upon receipt of the SETUP ACK any saved digits will be transmitted. The DTMF tone mapping is as shown below: Low Group (Hz) 697 770 852 941 1209 1 (31) 4 (34) 7 (37) S (2A) High Group (Hz) 1336 2 (32) 5 (35) 8 (38) 0 (30) 1477 3 (33) 6 (36) 9 (39) # (23) 1633 A (not used) B (not used) C (not used) D (not used) Once the network has indicated that the full number has been received, no further digits will be sent to the network. All tones and announcements from the network (eg ringing, NU, busy etc) and audio (if the call is connected) will be routed to the POTS port initiating the call, until that port goes on-hook. 1.5.5.4 Connected Calls Once a call is connected to an analogue port, whether it was incoming or outgoing, a port-specific LED indicator pin is set high to indicate that the call is connected. See section 1.5.9.1 for details of the LED indicator pins. Once the call is disconnected, either by receipt of a DISCONNECT message from the network or an on-hook indication, the ports' LED indicator pin is set low. During a call, if a Recall (ie a line break of appropriate length) is received from a POTS port, the CMX208 will start to look for DTMF tones received on that POTS port. Any tones received will then be sent to the network in ISDN INFORMATION messages, as Keypad Information Elements. 1.5.5.5 Call Clearing The call is cleared either by the port going on-hook or by the ISDN network. Note that the ISDN Bchannel which was being used is not released until the POTS port which was in use has gone onhook. (c) 1999 Consumer Microcircuits Limited (c) 1999 Chiron Technology Limited 16 D/208/1 ISDN Dual Telephony Protocol Engine CMX208 1.5.6 Application Programmer's Interface Details of this will be supplied to customers under a Non-Disclosure Agreement. The following Memory Map indicates the main code areas used on the CMX208: Function Code Space External RAM API area AMD79C30 ISDN Interface Chip PSB21525 HDLC Driver Chip Reserved Start Hex Address 000 000 020 000 0C0 000 0F0 000 0F0 100 0F0 200 End Hex Address 01F FFF 03F FFF 0EF FFF 0F0 0FF 0F0 1FF 0FF FFF 1.5.7 Hardware Description 1.5.7.1 LED Status Indicators (LED1 to LED9, and ILFI) LED1 (HK1) is low when analogue port 1 is off-hook, high when on-hook. LED2 (HK2) is low when analogue port 2 is off-hook, high when on-hook. LED4 (CN2) is high when analogue port 2 is connected to the ISDN network, low when not connected. LED8 (AR) is pulsed high and low until the ISDN line is activated, when it remains low constantly. LED9 (CN1) is high when analogue port 1 is connected to the ISDN network, low when not connected. ILFI is high when an ISDN Link Failure is Indicated, low when the link is operational. The functions of the LED and ILFI indicators are set out in the table below: Pin No. 12 13 15 19 21 54 Designation LED1 LED2 LED4 LED8 LED9 ILFI POTS port 1 Off-Hook ~ ~ ISDN Line Activated Call Connected ISDN Line Failure Indicator POTS port 2 ~ Off-Hook Call Connected ISDN Line Activated ~ ISDN Line Failure Indicator (c) 1999 Consumer Microcircuits Limited (c) 1999 Chiron Technology Limited 17 D/208/1 ISDN Dual Telephony Protocol Engine CMX208 1.6 1.6.1 Application Notes General The CMX208 is intended for use as part of an ISDN chipset. The CML recommended hardware implementation contains the following elements (refer to Figure 3): `S' bus interface via RJ45 socket. RJ11 analogue telephone sockets and analogue circuitry. ISDN line transformer. AMD79C30 S-interface controller. Auxiliary Motorola MC145480 PCM codec. 64K bytes external RAM. 16K Non-volatile memory. Six processor controlled LED indicator signals. Figure 3 Application Block Diagram 1.6.2 Approvals The firmware and finite state machine embedded in the CMX208 have been used in products which have gained ETSI CTR3 approval. (c) 1999 Consumer Microcircuits Limited (c) 1999 Chiron Technology Limited 18 D/208/1 ISDN Dual Telephony Protocol Engine CMX208 1.7 1.7.1 Performance Specification Electrical Performance 1.7.1.1 Absolute Maximum Ratings Exceeding these maximum ratings can result in damage to the device. Min. -0.3 -0.3 -30 -20 Max. 7.0 VDD + 0.3 +100 +10 Units V V mA mA Supply (AVDD - AVSS), (DVDD0 - DVSS0), (DVDD1 - DVSS1) Voltage on any pin to AVSS, DVSS0 or DVSS1 Current into or out of any VDD or VSS pin Current into or out of any other pin S1 Package (QFP) Total Allowable Power Dissipation at Tamb = 25C ... Derating Storage Temperature Operating Temperature Min. -55 -40 Max. 1300 17 +125 +85 Units mW mW/C C C 1.7.1.2 Operating Limits Correct operation of the device outside these limits is not implied. Notes Supply: (AVDD - AVSS), (DVDD0 - DVSS0), and (DVDD1 - DVSS1) Operating Temperature 32 MHz Xtal Frequency Tolerance Min. 2.7 -40 -100 Max. 5.5 +85 +100 Units V C ppm (c) 1999 Consumer Microcircuits Limited (c) 1999 Chiron Technology Limited 19 D/208/1 ISDN Dual Telephony Protocol Engine CMX208 1.7.1.3 Operating Characteristics Details in this section represent design target values and are not currently guaranteed. For the following conditions unless otherwise specified: Xtal Frequency = 32MHz 100ppm, AVDD = DVDD0 = DVDD1 = 3.0V to 5.0V, Tamb = - 40C to +85C. Notes DC Parameters IDD (total, operational) IDD (total in HALT mode) IDD (total in IDLE mode) Digital Interface Input logic "1" level Input logic "0" level Input leakage current (Vin = 0 to DVDD) Output logic "1" level (lOH = -2mA) Output logic "0" level (lOL = 2mA) Input or Output leakage current (Vout = VDD) Xtal/Clock Input 'High' pulse width (tWXH) 'Low' pulse width (tWXL) Risetime (tXR) Falltime (tXF) Period (tCYK) 1 1 1 Min. - - - Typ. 25.0 13.0 - - - - - - - - - - - - Max. 45.0 26.0 12.0 - 30% +10.0 - 400 10 Units mA mA mA 70% - -10.0 VDD -1.0 - - VDD VDD A V mV A 2 2 2 2 2, 3 10 10 - - 31.2468 125 125 10 10 31.2531 ns ns ns ns ns Notes: 1. Not including any current drawn by external circuitry. 2. Timing for an external input to the XTAL pin. 3. A fundamental cut crystal is recommended. (c) 1999 Consumer Microcircuits Limited (c) 1999 Chiron Technology Limited 20 D/208/1 ISDN Dual Telephony Protocol Engine CMX208 1.7.1.3 Operating Characteristics (continued) Timing Diagrams Figure 4 External Memory Access Timing (c) 1999 Consumer Microcircuits Limited (c) 1999 Chiron Technology Limited 21 D/208/1 ISDN Dual Telephony Protocol Engine CMX208 Timing Diagrams (continued) Figure 5 Bus Hold Timing Figure 6 Miscellaneous Timing (c) 1999 Consumer Microcircuits Limited (c) 1999 Chiron Technology Limited 22 D/208/1 ISDN Dual Telephony Protocol Engine CMX208 AC Timing Parameters (continued) For the following conditions unless otherwise specified: Xtal Frequency = 32MHz, AVDD = DVDD0 = DVDD1 = 3.0V to 5.0V, Tamb = - 40C to +85C. Read/Write operation (1/2) Parameter Address setup time ASTB high-level width Address hold time to (ASTB) Address hold time (to RD ) Delay from address to RD Address float time (to RD) Delay from address to data input Delay from ASTB to data input Delay from RD to data input Delay from ASTB to RD Data hold time (to RD) Delay from RDto address active Symbol tSAST tWSTH tHSTLA tHRA tDAR tFRA tDAID tDSTID tDRID tDSTR tHRID tDRA Conditions VDD = +5.0V 10% VDD = +5.0 V 10% VDD - +5.0 V 10% Min. (0.5 + a) T - 15 (0.5 + a) T - 31 (0.5 + a) T - 17 (0.5 + a) T - 40 0.5T - 24 0.5T - 34 0.5T - 14 (1 + a) T - 9 (1 + a) T - 15 - - - - - - - 0.5T - 9 0 0.5T - 8 0.5T - 12 1.5T - 8 1.5T - 12 0.5T - 17 (1.5 + n) T - 30 (1.5 + n) T - 40 0.5T - 14 (1 + a) T - 5 (1 + a) T - 15 - - - 0.5T - 9 Max. - - - - - - - - - 0 (2.5 + a + n) T - 37 (2.5 + a + n) T - 52 (2 + n) T - 40 (2 + n) T - 60 (1.5 + n) T - 50 (1.5 + n) T - 70 - - - - - - - - - - - - 0.5T + 19 0.5T + 35 0.5T - 11 - Units ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns VDD = +5.0V 10% VDD = +5.0V 10% VDD = +5.0V 10% VDD = +5.0 V 10% VDD = +5.0 V 10% After program is read After program is read VDD = +5.0 V 10% After data is read After data is read Delay from RD to ASTB RD low-level width Address hold time (to WR) Delay from address to WR Delay from ASTB to data output Delay from WR to data output Delay from ASTB to WR tDRST tWRL tHWA tDAW tDSTOD tDWOD tDSTW VDD = 5.0 V 10% VDD = +5.0V 10% VDD = +5.0V 10% Where: T = tCYK (system clock cycle time) a = 1 (during address wait), otherwise, 0 n = Number of wait states (n = 2) (c) 1999 Consumer Microcircuits Limited (c) 1999 Chiron Technology Limited 23 D/208/1 ISDN Dual Telephony Protocol Engine CMX208 Read/Write operation (2/2) Parameter Data setup time (to WR) Data hold time (to WR)Note 1 Delay from WR to ASTB WR low-level width Symbol tSODW tHWOD tDWST tWWL Conditions VDD = +5.0 V 10% VDD = +5.0V 10% Min. (1.5 + n) T - 30 (1.5 + n) T - 40 0.5T - 5 0.5T - 25 0.5T - 12 (1.5 + n) T - 30 (1.5 + n) T - 40 Max. - - - - - - - Units ns ns ns ns ns ns ns VDD = +5.0V 10% Note 1: Hold time includes the time during which VOH1 and VOL1 are held under the load conditions of CL = 50 pF and RL = 4.7 k. Bus Hold timing Parameter Delay from WAITN to float Delay from WAITN to STN Delay from float to STN Delay from WAITN to STN Delay from STN to active Symbol tFHQC Conditions Min. - - - - - - 1T - 20 1T - 30 Max. (6 + a + n) T + 50 (7 + a + n) T + 30 (7 + a + n) T + 40 1T + 30 2T + 40 2T + 60 - - Units ns ns ns ns ns ns ns ns tDHQHHAH VDD = +5.0 V 10% tDCFHA tDHQLHAL tDHAC VDD = +5.0 V 10% VDD = +5.0 V 10% Miscellaneous timing Parameter ASTB cycle time ASTB low-level width ASTB high-level width ASTB rise time ASTB fall time Symbol tCYCL tCLL tCLH tCLR tCLF Conditions VDD = +5.0 V 10% VDD = +5.0 V 10% VDD = +5.0 V 10% VDD = +5.0 V 10% Min. nT 0.5 tCYCL- 10 0.5 tCYCL- 20 0.5 tCYCL- 10 0.5 tCYCL- 20 - - - - 10 10 10 10 Max. - - - - - 10 20 10 20 - - - - Units ns ns ns ns ns ns s s s s NMI low-level width NMI high-level width RSTN low-level width RSTN high-level width Where: tWNIL tWNIH tWRSL tWRSH T = tCYK (system clock cycle time) a = 1 (during address wait), otherwise, 0. n = Number of wait states (n = 2). (c) 1999 Consumer Microcircuits Limited (c) 1999 Chiron Technology Limited 24 D/208/1 ISDN Dual Telephony Protocol Engine CMX208 1.7.2 Packaging Figure 7 QFP Mechanical Outline: Order as part no. CMX208S1 Handling precautions: This product includes input protection, however, precautions should be taken to prevent device damage from electro-static discharge. 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 this product specification. CML has a policy of testing every product shipped using calibrated test equipment to ensure compliance with this product specification. Specific testing of all circuit parameters is not necessarily performed. Oval Park - LANGFORD MALDON - ESSEX CM9 6WG - ENGLAND Telephone: +44 (0)1621 875500 Telefax: +44 (0)1621 875600 e-mail: sales@cmlmicro.co.uk http://www.cmlmicro.co.uk |
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