MAXIM DS3112RD

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
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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
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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
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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.
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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
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© 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