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| DS3254DK Quad DS3/E3/STS-1 LIU Demo Kit www.maxim-ic.com GENERAL DESCRIPTION The DS3254DK is an easy-to-use evaluation kit for the DS3254 quad DS3/E3/STS-1 LIU. A surfacemounted DS3254 and careful layout of the analog signal traces provide maximum signal integrity to demonstrate the transmit and receive capabilities of the DS3254. On-board Dallas 8051-compatible microcontroller and included software give point-andclick access to configuration and status registers from a personal computer. LEDs on the board indicate interrupt, loss-of-signal, transmit driver monitor, and PRBS sync status for all four ports. The board provides BNC connectors for the line-side transmit and receive differential pairs and a 50-pin connector for framer interface signals. All LEDs and connectors are clearly labeled with silk screening to identify associated signals. FEATURES Soldered DS3254 for Best Signal Integrity BNC Connectors, Transformers, and Termination Passives for All Four LIUs Careful Layout for Analog Signal Paths Equipment-Side Connector for External Data Source/Sink or External Remote Loopback On-Board DS3 and E3 Crystal Oscillators DS3254 Configured for CPU Bus Operation for Complete Control Over the Device On-Board Dallas Microcontroller and Included Software Provide Point-and-Click Access to the DS3254 Register Set LEDs for Interrupt, Loss-of-Signal, Transmit Driver Monitor, and PRBS Sync Banana Jack Connectors for VDD and GND Support Use of Lab Power Supplies Separate DS3254 VDD to Enable IDD Measurements Easy-to-Read Silk Screen Labels Identify the Signals Associated with All Connectors, Jumpers and LEDs DEMO KIT CONTENTS DS3254DK Board CD-ROM ChipView Software DS3254.def Definition File DS3254DK Data Sheet DS3254 Data Sheet ORDERING INFORMATION PART DS3254DK DESCRIPTION DS3254 Demo Kit 1 of 13 REV: 050205 DS3254 Demo Kit COMPONENT LIST DESIGNATION U1 U2, U4, U5 U3, U8, U9 U6, U7 U10 U11 U12 C1, C2, C7, C8, C14, C24, C43, C44, C47-C60 C13, C15-C17, C20, C22, C23, C25, C26, C37, C38 C27-C36, C39-C42 C45, C46 C18, C19 C3-C6, C9-C12 D1 DS1-DS3, DS5, DS6, DS9, DS10, DS13, DS14, DS18 DS4, DS7, DS8, DS11, DS12, DS16, DS19, DS20 J1 J2-J9 J10 J11 J12, J14 J13 J15 JMP1-JMP10, JMP16 JMP11-JMR15 L1 R7-R12, R14, R31, R32, R34-R36, R38, R77, R78, R83-R90, R96-R98 R48-R52, R60-R76, R99-101 R17, R41, R42, R46, R55, R56, R92, R102-R104 R1-R6, R13, R15, R16, R18, R19, R22, R24-R30, R40, R43, R53, R54, R79-R82, R91, R95 R93 R94 R20, R21, R23, R33, R37, R39, R44, R45, R47, R57-R59 SW1-SW4 SW5, SW6 QTY 1 3 3 2 1 1 22 11 14 2 2 8 1 10 8 1 8 1 1 2 1 1 11 5 1 26 25 10 DESCRIPTION Quad DS3/E3/STS1 LIU, 144-pin BGA IC, hex inverter, SO Tiny logic, high-speed, 2-input OR gate, 5-pin SOT23 Oct buffer/driver, 3.3V SOP, 20-pin narrow SO, 8-pin, step-up DC-DC converter 0.5A limit Dual RS232 XMITR/RCVR, 16-pin SO (300-mil) High-speed microcontroller, 44-pin TQFP 0.1mF, 25V 10% ceramic capacitors (1206) 10mF, 10V, 20% ceramic capacitors (1206) 0.1mF, 16V 10% ceramic capacitors (0805) 22pF, 100V 10% ceramic capacitors (1206) 68mF, 16V 20% tantalum capacitors (D case) 47,000pF, 50V 10% ceramic capacitors (1206) 1A, 50V diode LED, red, SMD LED, green, SMD Connector, 10-pin, dual row, vertical Right angle BNC Connector, DB9 RA, long case Terminal strip, 50-pin, dual row vertical Socket, banana plug, horizontal, red Socket, banana plug, horizontal, black Connector, BNC, 50 ohm vertical 5 pin Do not place, open 3-pin TH jumper Do not place, shorted 2-pin TH jumper 22.0mH, 2-pin SMT 20% inductor 332W 1% 1/10W resistors (0805) 33.2W 1% 1/10W resistors (0805) 0W 5% 1/10W resistors (0805) MANUFACTURER PART Dallas Semiconductor DS3254 Toshiba TC74HC04AFN -- Texas Instruments Maxim Dallas Semiconductor Dallas Semiconductor Panasonic Panasonic Phycomp AVX Panasonic Panasonic Generic Panasonic Panasonic Digi-Key (Distributor) Amphenol Amp Samtec Mouser Mouser CAM N/A N/A Coiltronics Panasonic Panasonic Panasonic NC7SZ32M5 SN74ALVC244NSR MAX1675EUA DS232AS DS87C520-ECL ECJ-3VB1E104K ECJ-3YB1A106M 08052R104K7B20D 12061A220KAT2A ECS-T1CD686R ECU-V1H473KBW 1N4001 LN1251C LN1351C S2012-05-ND 31-5431 747459-1 TSW-125-07-T-D 164-6219 164-6218 CP-BNCPC-002 N/A N/A UP1B-220 ERJ-6ENF3320V ERJ-6ENF33R2V ERJ-6GEY0R00V 29 1 1 12 4 2 10kW 5%, 1/10W resistors (0805) 3.9W 5%, 1/10W resistors (0805) 51.1W 1%, 1/10W resistors Resistors (0805), do not populate Switch, SPDT slide, 3-pin TH Switch MOM 4-pin single pole Panasonic Panasonic Panasonic N/A Tyco Panasonic ERJ-6GEYJ103V ERJ-6GEYJ3R9V ERJ-6ENF51R1V N/A SSA12 EVQPAE04M 2 of 13 DS3254 Demo Kit DESIGNATION T1-T8 Y1 Y2 Y3 QTY 8 1 1 1 DESCRIPTION XFMR, XMIT/RCV, 1 to 2CT, SMT 6-pin Oscillator, crystal clock, 3.3V, 44.736MHz Oscillator, crystal clock, 3.3V, 34.368MHz 11.0592MHz low-profile crystal MANUFACTURER Pulse Engineering Saronix Saronix Pletronics PART PE-65968 NTH089AA3-44.736 NTH089AA3-34.368 LP49-33-11.0592M 3 of 13 DS3254 Demo Kit BOARD FLOORPLAN Figure 1 shows the floorplan of the DS3254DK. The DS3254 is near the center of the board, surrounded by 2:1 transformers. The line-side BNC connectors for the transmit (Tx) and receive (Rx) differential pairs are located at the bottom of the board. LEDs driven by DS3254 pins RLOSn, TDMn, and PRBSn are located next to the corresponding BNC connectors. An LED driven by the DS3254's INT pin is located to the far right. The system connector in the upper-left corner presents all of the DS3254's framer interface pins: RCLKn, RPOSn/RDATn, RNEG/RLCVn, TCLKn, TPOSn/TDATn, and TNEGn. In the upper-right corner are banana jacks for ground, board VDD, and a separate DS3254 VDD (useful for DS3254 IDD measurements). The board also contains DS3 and E3 oscillators and the necessary jumpers to configure the DS3254 transmitters for clocking from the oscillators, from the system connector, from the external clock BNC jack, or from the DS3254 receivers (external remote loopback). In the right-center of the board are a DS87C520 microcontroller and associated components, including four switches and four LEDs connected to the controller's general-purpose I/O pins. The microcontroller translates memory access requests from the RS-232 serial port (top-center of the board) into register accesses on the DS3254. Figure 1. Board Floorplan SYSTEM CONNECTOR EXTERNAL/INTERNAL CLOCK JUMPERS DS3254 VDD BOARD VDD TCLK1 EXT CLOCK INPUT CLOCK BUFFERS TCLK2 TCLK3 TCLK4 SERIAL PORT AND RS-232 TRANSCEIVER DS3 OSC STMCLK E3MCLK T3MCLK TCLK1 TCLK2 TCLK3 TCLK4 CLOCK BUFFERS mC OSC GENERAL PURPOSE SWITCHES AND LEDS mC RESET E3 OSC xfrmr xfrmr xfrmr xfrmr 87C520 mC DS3254 xfrmr xfrmr xfrmr LEDs LEDs LED INT JTAG xfrmr LEDs LEDs BNC RX4 BNC TX4 BNC RX2 BNC TX2 BNC RX3 BNC TX3 BNC RX1 LED PWR DS3/E3 CLOCK JUMPERS POWERSUPPLY COMPONENTS BNC TX1 4 of 13 GND 3254 RESET DS3254 Demo Kit TCLK JUMPERS Jumpers JMP7, JMP8, JMP9, and JMP10 (just below the system connector) select the clock source for the DS3254 transmitters. The center pin on each of these jumpers is connected directly to the associated TCLK pin on the DS3254. To drive a DS3254 TCLK pin from the system connector, connect the center pin and the EXT (external) pin of the associated jumper. To drive a DS3254 TCLK pin from one of the on-board oscillators, connect the center pin and the INT (internal) pin of the associated jumper. Jumpers JMP2, JMP3, JMP4, and JMP5 select between the DS3 oscillator and the E3 oscillator (Figure 2). Figure 2. TCLK Jumpers SYSTEM CONNECTOR EXT INT DS3 OSC TCLK1 TCLK2 TCLK3 TCLK4 JMP7 DS3254 TCLK1 EXT INT DS3 OSC JMP8 DS3254 TCLK2 EXT INT DS3 OSC JMP9 DS3254 TCLK3 EXT INT DS3 OSC JMP10 DS3254 TCLK4 JMP2 E3 OSC JMP3 E3 OSC JMP4 E3 OSC JMP5 E3 OSC LINE-SIDE CONNECTIONS The DS3254DK implements the transmit (Tx) and receive (Rx) line interface networks recommended in the DS3254 data sheet and shown in Figure 3. The BNC connectors for LIU1 are labeled TX1 and RX1. The BNC connectors for LIU2 are labeled TX2 and RX2. The BNC connectors for LIU3 are labeled TX3 and RX3. The BNC connectors for LIU4 are labeled TX4 and RX4. Figure 3. Line-Side Circuitry TRANSMIT EACH LIU TXP 330W (1%) 0.05mF (optional) TXN 1:2ct RECEIVE DS3254 RXP 330W (1%) 0.05mF (optional) RXN 1:2ct 5 of 13 DS3254 Demo Kit SYSTEM CONNECTOR The 50-pin system connector at the top of the board gives access to the following DS3254 signals: RCLKn, RPOSn/RDATn, RNEG/RLCVn, TCLKn, TPOSn/TDATn, and TNEGn. The system connector can be used to connect the DS3254 to an external DS3/E3 framer or other data source/sink. By using jumpers to connect TCLKn to RCLKn, TPOSn to RPOSn, and TNEGn to RNEGn, the system connector can also be used to implement an external remote loopback. In addition, it can be used to wire DS3254 input pins like TPOSn and TNEGn low. To wire a pin low, use a jumper to connect it to the neighboring GND pin on the upper row of the system connector. MICROCONTROLLER, SWITCHES, AND LEDS The DS87C520 microcontroller has factory-installed firmware in on-chip nonvolatile memory. This firmware translates memory access requests from the RS-232 serial port into register accesses on the DS3254. Switches SW1 through SW4 and LEDs DS7, DS11, DS19, and DS20 are connected to four general-purpose I/O pins on the microcontroller. When the microcontroller starts up it turns on DS20 and leaves DS7, DS11, and DS19 off to indicate that the controller is working correctly. Otherwise, these switches and LEDs are not used by the DS3254DK firmware. POWER-SUPPLY CONNECTORS Connect a 3.3V power supply across the red J12 (DK VDD) and black J13 (GND) banana jacks. Connect a separate supply to the red J14 (3154 VDD) and black J13 (GND). Jumpers (JMP11-JMP14) are provided to measure the device's current and can be used instead of J14. CONNECTING TO A COMPUTER Connect a standard DB-9 serial cable between the serial port on the DS3254DK and an available serial port on the (R) host computer. The host computer must be a Windows -based PC. Be sure the cable is a standard straightthrough cable rather than a null-modem cable. Null-modem cables prevent proper operation. INSTALLING AND RUNNING THE SOFTWARE ChipView is a general-purpose program that supports a number of Dallas Semiconductor demo kits. To install the ChipView software, run SETUP.EXE from the disk included in the DS3254DK box or from the zip file downloadable on our website at www.maxim-ic.com/DS3254DK. After installation, run the ChipView program with the DS3254DK board powered up and connected to the PC. If the default installation options were used, one easy way to run ChipView is to click the Start button on the Windows toolbar and select Programs(R)ChipView(R)ChipView. In the opening screen, click the Register View button. (The Demo and Terminal buttons are not supported for the DS3254DK.) Select the correct serial port in the Port Selection dialog box, then click OK. Next, the Definition File Assignment window appears. This window has subwindows to select definition files for up to four separate boards on other Dallas evaluation platforms. Because ChipView is communicating with the DS3254DK, only one subwindow is active. In the active subwindow, select the DS3254.DEF definition file from the list shown, or browse to find it in another directory. Press the Continue button. After selecting the definition file, the main part of the ChipView window displays the DS3254's register map. The registers in LIU1 are displayed in the left column followed by registers for the other LIUs in subsequent columns. The clock adapter control register, CACR, appears below the LIU1 registers. To select a register, click on it in the register map. When a register is selected, the full name of the register and its bit map are displayed at the bottom of the ChipView window. Bits that are logic 0 are displayed in white, while bits that are logic 1 are displayed in green. Windows is a registered trademark of Microsoft Corp. 6 of 13 DS3254 Demo Kit The ChipView software supports the following actions: * Toggle a bit. Select the register in the register map and then click the bit in the bit map. * Write a register. Select the register, click the Write button, and enter the value to be written. * Write all registers. Click the Write All button and enter the value to be written. * Read a register. Select the register in the register map and click the Read button. * Read all registers. Click the Read All button. BASIC DS3254DK CONFIGURATION These example configurations provide a quick start to using the DS3254DK. The DS3254 and the DS3254DK can be configured in many other ways. To set up other configurations, refer to the DS3254 data sheet and other sections of this data sheet. DS3 Configuration 1) On the system connector, jumper all four TPOS pins and all four TNEG pins to ground. 2) On jumpers JMP7 through JMP10, connect the center post to the INT post. This connects the DS3254's TCLK1 through TCLK4 pins to an on-board oscillator. 3) Place jumpers JMP2 through JMP5 to connect the DS3254's TCLK1 through TCLK4 pins to the on-board DS3 oscillator. Make sure JMP1 has T3MCLK connected to the DS3 oscillator. 4) Press and release the DS3254 reset button on the DK board -OR- set and then clear the RST bit in each GCR register. The reset default mode is DS3. 5) Clear the TTS bit in each TCR register and clear the RTS bit in each RCR register. 15 6) Set the TDSA and TDSB bits in each GCR register to transmit a 2 - 1 PRBS pattern. 7) For each LIU port, connect the transmitter to the receiver using 75W coax to configure an external local loopback -OR- set the LLB bit in each GCR register to configure an internal local loopback. 8) Press the Read All button twice to update the display. At this point the transmitter is generating a 2 - 1 PRBS pattern that is being looped back to the receiver. On the DS3254DK board, the PRBS LEDs should be lit, indicating PRBS sync. The TDM and RLOS LEDs should not be lit. In the register map, the SR and SRL registers should contain all zeros. 15 E3 Configuration 1) On the system connector, jumper all four TPOS pins and all four TNEG pins to ground. 2) On jumpers JMP7 through JMP10, connect the center post to the INT post. This connects the DS3254's TCLK1 through TCLK4 pins to an on-board oscillator. 3) Place jumpers JMP2 through JMP5 to connect the DS3254's TCLK1 through TCLK4 pins to the on-board E3 oscillator. Make sure JMP6 has E3MCLK connected to the E3 oscillator. 4) Press and release the DS3254 reset button on the DK board -OR- set and then clear the RST bit in each GCR register. 5) Set the E3 bit in each GCR register. 6) Clear the TTS bit in each TCR register and clear the RTS bit in each RCR register. 23 7) Set the TDSA and TDSB bits in each GCR register to transmit a 2 - 1 PRBS pattern. 8) For each LIU port, connect the transmitter to the receiver using 75W coax to configure an external local loopback -OR- set the LLB bit in each GCR register to configure an internal local loopback. 9) Press the Read All button twice to update the display. At this point the transmitter is generating a 2 - 1 PRBS pattern that is being looped back to the receiver. On the DS3254DK board, the PRBS LEDs should be lit, indicating PRBS sync. The TDM and RLOS LEDs should not be lit. In the register map, the SR and SRL registers should contain all zeros. 23 7 of 13 DS3254 Demo Kit STS-1 Configuration 1) On the system connector, jumper all four TPOS pins and all four TNEG pins to ground. 2) On jumpers JMP7 through JMP10, connect the center post to the EXT post. This connects the DS3254's TCLK1 through TCLK4 pins to the respective pins on the system connector. (The position of jumpers JMP1 through JMP6 does not matter.) 3) Apply an STS-1 clock source (51.84MHz) to the TCLK1, TCLK2, TCLK3, and TCLK4 pins on the system connector and to the external clock input on connector J15. 4) Press and release the DS3254 reset button on the DK board -OR- set and then clear the RST bit in each GCR register. 5) Set the E3 and STS bits in each GCR register to configure each LIU for STS-1 operation. 6) Clear the TTS bit in each TCR register and clear the RTS bit in each RCR register. 15 7) Set the TDSA and TDSB bits in each GCR register to transmit a 2 - 1 PRBS pattern. 8) For each LIU port, connect the transmitter to the receiver using 75W coax to configure an external local loopback -OR- set the LLB bit in each GCR register to configure an internal local loopback. 9) Press the Read All button twice to update the display. At this point the transmitter is generating a 2 - 1 PRBS pattern that is being looped back to the receiver. On the DS3254DK board, the PRBS LEDs should be lit, indicating PRBS sync. The TDM and RLOS LEDs should not be lit. In the register map, the SR and SRL registers should contain all zeros. 15 DS3254 INFORMATION The DS3254 Quick View page on our website has the latest DS3254 data sheet, application notes, and downloads. Go to www.maxim-ic.com/DS3254. DS3254DK INFORMATION The DS3254DK Quick View page on our website has the latest DS3254DK data sheet, ChipView software updates, and downloads. Go to www.maxim-ic.com/DS3254DK. TECHNICAL SUPPORT For additional technical support, email your questions to telecom.support@dalsemi.com. SCHEMATICS The DS3254DK schematics are featured in the following 5 pages. 8 of 13 Maxim/Dallas Semiconductor cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim/Dallas Semiconductor product. No circuit patent licenses are implied. Maxim/Dallas Semiconductor reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2005 Maxim Integrated Products * Printed USA The Maxim logo is a registered trademark of Maxim Integrated Products, Inc. The Dallas logo is a registered trademark of Dallas Semiconductor Corporation. |
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