DS3112RD DS3/E3 Multiplexer Reference Design www.maxim-ic.com GENERAL DESCRIPTION FEATURES The DS3112RD is a reference design for the DS3112 DS3/E3 framer/mux and the DS3150 DS3/E3 LIU. Both devices are surface mounted to minimize board size and to provide signal integrity. The DK101/DK2000 motherboard and included software give point-and-click access to configuration and ® status registers from a Windows -based PC. LEDs on the board indicate loss-of-signal, transmit driver monitor, and PRBS sync status of the LIU. The board provides BNC connectors for an external clock, the line-side transmit and receive differential pairs, and a connector for data path interface. A PLD provides registered access to the LIU control pins along with control of clock and data paths. § Soldered DS3150 and DS3112 § BNC Connectors, Transformers, and Termination Passives for the LIU § Careful Layout for Analog Signal Paths § Memory-Mapped PLD for Control of DS3150 § BNC Connectors for External Clock and LineSide Interface § Compatible with DK101 and DK2000 Demo Kit Motherboards § DK101/DK2000 and Included Software Provide Point-and-Click Access to the DS3112 Register Set Each DS3112RD is shipped with a free DK101 motherboard. For complex applications, the DK2000 high-performance demo kit motherboard can be purchased separately. § LEDs for Loss-of-Signal, Transmit Driver Monitor, and PRBS Sync 1 of 12 REV: 082103 Windows is a registered trademark of Microsoft Corp. REFERENCE DESIGN CONTENTS DS3112RD Daughter Card DK101 Demo Kit Motherboard CD-ROM ChipView Software DS3112RD.DEF Definition File DS3112.DEF Definition File DS3112RD Data Sheet DS3112 Data Sheet DS3150 Data Sheet ORDERING INFORMATION PART DS3112RD DESCRIPTION DS3112 Reference Design DS3112RD DS3/E3 Multiplexer Reference Design COMPONENT LIST DESIGNATION QTY DESCRIPTION SUPPLIER C1–C16, C20–C27 24 0.1mF 10%, 25V ceramic capacitors (1206) Panasonic ECJ-3VB1E104K C17–C19 3 0.047mF 10%, 50V ceramic capacitors (1206) Panasonic ECU-V1H473KBW C28–C30 3 10mF 20%, 16V tantalum capacitors (B case) Panasonic ECS-T1CX106R DS1–DS4 4 LED, red, SMD Panasonic LN1251C J1, J2 2 5-pin, right-angle, BNC connectors Trompeter UCBJR220 J3 1 5-pin, vertical, BNC connector Cambridge CP-BNCPC-004 J4–J6 3 50-pin jumper, dual row Samtec TFM-125-02-S-D-LC J7 1 10-pin, dual row, vertical connector Digi-Key S2012-05-ND R1–R4, R8, R14, R500 7 10kW 1%, 1/8W resistors (1206) Panasonic ERJ-8ENF1002V R5, R10 2 0W 5%, 1/8W resistors (1206) Panasonic ERJ-8GEYJ0R00V R6, R7, R9, R11–R13 6 330W 0.1%, 1/10W MF resistors (0805) Panasonic ERA-6YEB331V R501 1 75W 5%, 1/8W resistor (1206) Panasonic ERJ-8GEYJ750V T1, T2 2 XFMR, 1-to-2 count, 6-pin SMT Pulse Engineering PE-65968 TP1–TP17 17 Testpoint, 1 plated thru-hole — — U1 1 T3/E3 mux/framer U2 1 T3/E3/STS-1 line interface U3 1 IC, hex interverter, SO Toshiba TC74HC04AFN U4 1 IC, PLD, 100-pin TQFP Altera EPM7128AETC100-10 U5 1 IC, MUX, quad 2INPUT Philips 74LVC157APW DH Dallas Semiconductor Dallas Semiconductor PART DS3112 DS3150T Rx BNC Rx TRANSFORMER DS3150 Tx BNC JTAG BOARD FLOORPLAN Dallas Semiconductor DS3112 Tx TRANSFORMER PLD EXT CLOCK LED LED LED LED 2 of 12 DS3112RD DS3/E3 Multiplexer Reference Design PLD MEMORY MAP The PLD on the DS3112RD is used to route clocks from the processor board DK2000/DK101 and to control the DS3150 and the DS3112. The PLD is mapped at address 00h and contains 25 registers. The first eight registers (excluding register address 01h, which has no function on the 3112RD) are read-only, and are programmed at the factory to document board identification and revision information. The next 16 registers control the state of pins on the DS3150 and DS3112. The last register controls the clock source to the FTCLK pin on the DS3112 and the MCLK pin on the DS3150. The PLD provides tri-state control of the pins. If a 01h is written to a register, the corresponding pin is forced high, a value of 00h forces the pin low, and writing any other value puts the pin in a tristate mode. The bit descriptions in the definition file for the DS3112RD describe how to control a pin specifically (Table 1). For more information about definition files, refer to the DK101 data sheet or the DK2000 data sheet. MEMORY MAP The DS3112 is mapped at 1000h. Table 1. DS3112RD CPLD Register Map OFFSET NAME TYPE 0X0000 0X0002 0X0003 0X0004 0X0005 0X0006 0X0007 0X0011 0X0012 0X0013 0X0014 0X0015 0X0016 0X0017 0X0018 0X0019 0X001A 0X001B 0X001C 0X001D 0X001E 0X001F 0X0020 0X0021 BID XBIDH XBIDM XBIDL BREV AREV PREV TDS0 TDS1 EFE ICE LBKS RMON TESS TTS ZCSE LBO RST MUXSEL G747E T3E3MS FRMECU FTMEI T3E3CLK Read-Only Read-Only Read-Only Read-Only Read-Only Read-Only Read-Only Read-Write Read-Write Read-Write Read-Write Read-Write Read-Write Read-Write Read-Write Read-Write Read-Write Read-Write Read-Write Read-Write Read-Write Read-Write Read-Write Read-Write DEFAULT VALUE 0x0D 0x00 0x00 0x01 — — — 0x00 0x00 0x01 0x00 0x01 0x00 0x01 0x01 0x00 0x00 0x01 0x01 0x00 0x00 0x00 0x00 0x01 DESCRIPTION Board ID High Nibble Extended Board ID Middle Nibble Extended Board ID Low Nibble Extended Board ID Board FAB Revision Board Assembly Revision PLD Revision DS3150 Transmit Data Select 0 DS3150 Transmit Data Select 1 DS3150 Enhanced Feature Enable DS3150 Invert Clock Enable DS3150 Loopback Select DS3150 Receive Monitor Mode DS3150 T3/E3/STS-1 Select DS3150 Transmit Tri-State DS3150 Zero Code Suppression DS3150 Line Build-Out DS3112 Reset DS3112RD Data Path Mux DS3112 G747 Mode Enable DS3112 T3/E3 Mode Select DS3112 Error Counter Strobe DS3112 Error Insert Strobe DS3112RD Clock Select 3 of 12 DS3112RD DS3/E3 Multiplexer Reference Design LINE-SIDE CONNECTIONS The DS3112RD implements the transmit (Tx) and receive (Rx) line interface networks recommended in the DS3150 data sheet (Figure 1). The BNC connectors are labeled J1 (Tx) and J2 (Rx). Figure 1. Line-Side Circuitry TRANSMIT LIU TXP 0.05mF 330W (1%) TXN 1:2ct DS3150 RECEIVE RXP 0.05mF 330W (1%) RXN 1:2ct INTERFACE CONNECTOR Two 50-pin connectors (J4, J5) on the bottom of the board provide the processor interface, clocks, and power supply from the DK101 or DK2000 motherboards. These connectors also provide a bidirectional clock/data/sync connection with the DK2000. The third connector (J6) is provided for future expansion on the DK2000 and is not connected on the DS3112RD. CONNECTING TO A COMPUTER Refer to the DK101 data sheet or the DK2000 data sheet for information. BASIC OPERATION The DS3112RD powers up in the T3 mode, transmitting all ones, as specified by the default values in the CPLD registers (Table 1) and the DS3112’s reset condition. The processor interface supplies the transmit clock by default. The user must access registers in the DS3112 and the CPLD to configure the board. To facilitate configuration, definition files that support the DS3112 reference design (DS3112.DEF, DS3112RD.DEF) can be downloaded from our website, www.maxim-ic.com/DS3112RD. DS3112RD INFORMATION For more information about the DS3112RD—including the ChipView software, the latest support files (.DEF, .INI, etc.), and the latest data sheet—please visit our website at www.maxim-ic.com/DS3112RD. DS3112 INFORMATION For more information about the DS3112, please consult the DS3112 data sheet, available on our website at www.maxim-ic.com/DS3112. 4 of 12 DS3112RD DS3/E3 Multiplexer Reference Design DS3150 INFORMATION For more information about the DS3150, please consult the DS3150 data sheet, available on our website at www.maxim-ic.com/DS3150. DK101/DK2000 INFORMATION For more information about the DK101 or DK2000, please consult their respective data sheets, available on our website at www.maxim-ic.com/DK101 and www.maxim-ic.com/DK2000. TECHNICAL SUPPORT For additional technical support, please e-mail your questions to [email protected]. 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 © 2003 Maxim Integrated Products · Printed USA 5 of 12 © 2003 Maxim Integrated Products · Printed USA © 2003 Maxim Integrated Products · Printed USA © 2003 Maxim Integrated Products · Printed USA © 2003 Maxim Integrated Products · Printed USA © 2003 Maxim Integrated Products · Printed USA © 2003 Maxim Integrated Products · Printed USA © 2003 Maxim Integrated Products · Printed USA