Sundance SMT373 User Manual

SMT373

User Manual

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User Manual (QCF42); Version 3;8/11/00 © Sundance Multiprocessor Technonlogy Ltd. 2000

Version 1.8 Page 2 of 15 SMT373 User Manual

Revision History

Date Comments Engineer Version

17/09/99 Initial release J.V. 1.0 12/10/99 Pin-out name modified and RS422/485

J.V. 1.1

possibility added 31/10/99 Physical layout added J.V. 1.2 05/11/99 External connector pin-out J.V. 1.3 18/11/99 Height of the module added J.V. 1.4 28/02/00 External connector pin-out update J.V. 1.5 07/04/00 Storage temperature added J.V. 1.6 30/11/00 Changed the document layout to the new

M.A. 1.7 template. Also changed some of the text so it used a consistent font.

27/01/05 Pinout corrected for DIR2 and DIR0

J.V. 1.8 Update for shb compatibility using shb2sdb

adaptor.

Version 1.8 Page 3 of 15 SMT373 User Manual

Table of figure

Figure 1 Connectivity diagram.................................................................................... 5

Figure 2 SDB connector pin-out ................................................................................. 8

Figure 3 LVDS connector pin-out ............................................................................. 10

Figure 4 External connector pin-out.......................................................................... 12

Figure 5 Version 1: Direct connection....................................................................... 13

Figure 6 Version 2: Remote connection ................................................................... 14

Figure 7 Top physical layout..................................................................................... 15

Figure 8 Bottom physical layout................................................................................ 15

Version 1.8 Page 5 of 15 SMT373 User Manual

Ω

Scope

This document describes the SMT373 I/O module.

100

18

18 18

40-way

connectors

23 TTL or

LVTTL

usable per

connector

18

18 18

100

40-way

connectors

20 LVDS pairs per

connector

Legend

D

EN

Figure 1 Connectivity diagram

D -

Signifies

EN D +

D + D

D -

Version 1.8 Page 6 of 15 SMT373 User Manual

Main features

The SMT373 converts Sundance Digital Bus SDB LVTTL signals to Low-Voltage Differential Signals (LVDS) and can connect two systems several meters apart.

The board operates a conversion between LVTTL (TTL tolerant) signals and Low Voltage Differential Signals. It provides two bi-directional 20-bit channels that can transfer up to 2 GBytes/s thanks to 40 SN65LVDM176 transceivers from TI that can individually reach 400Mbits/s.

Each channel provides 16 bits of data, a clock and a clock-enable signals with their direction controlled by a single signal. Two other signals can be used for the bus arbitration in a bi-directional application. The direction of each of them can be controlled independently.

All the direction control signals are accessible through the connectors and therefore can be set by the board they are connected to.

The Sundance Digital Bus already provides 200Mbytes/s data transfer rate between TIMs. Thanks to this module a TIM can communicate with another board several meters away.

It only requires 3.3V Power supply.

Technical Description

There are two versions of the board, which differ in the way the TTL signals are input. Version 1: Direct connection. The Mezzanine card is connected PCB to PCB on a

carrier TIM through well-positioned SDB connector as they are on the SMT358. Version 2: Remote connection. The Mezzanine card is connected through SDB

cables. It only needs the 3.3V provided through the mounting holes. The board uses LVDM transceivers. They are TIA/EIA-644 standard compliant

devices except that the output current of the drivers is doubled. The board is compatible with LVDS drivers and has 100Ω termination resistors. It is compatible with LVDS receivers because it outputs twice the current of a LVDS driver and therefor will keep the same voltage for a double terminated line. In half-duplex transmissions it has the advantage to keep the voltage as in unidirectional transmissions whereas LVDS would have reduced it by two due to the double terminated lines.

If the line is not driven or in open-circuit, the output is forced high.

Version 1.8 Page 7 of 15 SMT373 User Manual

The SN65LVDM176 main features are following:

• Low-Voltage Differential Driver and Receiver for Half-Duplex Operation

• Designed for Signalling Rates of 400 Mbit/s

• ESD Protection Exceeds 12 kV on Bus Pins

• Operates from a Single 3.3 V Supply

• Low-Voltage Differential Signalling with Typical Output Voltages of 350 mV and a 50 Ω

• Load Propagation Delay Times

 Driver: 1.7 ns Typical  Receiver: 3.7 ns Typical

• Power Dissipation at 200 MHz

 Driver: 50 mW Typical  Receiver: 60 mW Typical

• LVTTL Levels are 5 V Tolerant Bus Pins are High Impedance when Disabled or With VCC Less Than 1.5 V Open-Circuit

• Fail-safe receiver

• Characterised for operation from -40°C to 85°C.

• Storage temperature range from -65°C to 150°C.

Module height

When the SMT373 is directly connected to the SMT358 as a piggy-back board (Direct connection version) the resulting height with the top LVDS cables fitted is 1,25 inches (3 cm) from the top layer of the carrier board.

The Remote version of the board can be fitted on a spare TIM site or anywhere else (as long as 3.3V is provided) and uses SDB cables to be connected to the module. The height of the module itself including the connectors is 0.5 inches (1.3 cm). So for example on a TIM slot the maximum height with the cable fitted is 0.75 inches (1.9 cm) from the top layer of the carrier board.

Version 1.8 Page 8 of 15 SMT373 User Manual

Connectors Pin-out

Function Pin Pin Function

GND 2 1 CLK GND 4 3 D0 GND 6 5 D1 GND 8 7 D2 GND 10 9 D3 GND 12 11 D4 GND 14 13 D5 GND 16 15 D6 GND 18 17 D7 GND 20 19 D8 GND 22 21 D9 GND 24 23 D10 GND 26 25 D11 GND 28 27 D12 GND 30 29 D13 GND 32 31 D14 GND 34 33 D15 DIR2 36 35 USERDEF0 DIR0 38 37 WEN DIR1 40 39 USERDEF1

Figure 2 SDB connector pin-out

DIR0 sets the direction of the line USERDEF0, DIR1 of the line USERDEF1 and DIR2 of lines D0 to D15, CLKIN and WEN. Each transceiver acts as a driver when its direction pin is high and as a receiver when its direction pin is low.

Version 1.8 Page 9 of 15 SMT373 User Manual

Function Pin Pin Function

GND 2 1 CLK GND 4 3 D0 GND 6 5 D1 GND 8 7 D2 GND 10 9 D3 GND 12 11 D4 GND 14 13 D5 GND 16 15 D6 GND 18 17 D7 GND 20 19 D8 GND 22 21 D9 GND 24 23 D10 GND 26 25 D11 GND 28 27 D12 GND 30 29 D13 GND 32 31 D14 GND 34 33 D15

NC 36 35 USERDEF0 DIR0 38 37 WEN DIR1 40 39 USERDEF1

Figure 3 SDB connector pin-out for shb2sdb adaptors

The SMT373 is modified. DIR0 sets the direction of the line USERDEF0, D0 to D15, CLKIN and WEN.

DIR1 of the line USERDEF1. Each transceiver acts as a driver when its direction pin is high and as a receiver when its

direction pin is low. This allows for direction control and flow control.

Version 1.8 Page 10 of 15 SMT373 User Manual

Function Pin Pin Function

CLKIN + 2 1 CLKIN -

D0 + 4 3 D0 D1 + 6 5 D1 D2 + 8 7 D2 D3 + 10 9 D3 D4 + 12 11 D4 D5 + 14 13 D5 D6 + 16 15 D6 D7 + 18 17 D7 D8 + 20 19 D8 -

D9 + 22 21 D9 D10 + 24 23 D10 D11 + 26 25 D11 D12 + 28 27 D12 D13 + 30 29 D13 D14 + 32 31 D14 D15 + 34 33 D15 -

USERDEF0 + 36 35 USERDEF0 -

WEN+ 38 37 WEN -

USERDEF1 + 40 39 USERDEF1 -

Figure 3 LVDS connector pin-out

Version 1.8 Page 11 of 15 SMT373 User Manual

External connector pin-out

A 68-way SCSI connector is fitted on the back-plate of the PC for the external transmission. Ref: SMT373-CAB.

The connector is a HARTING 60 04 068 5344 (screw lock 60 01 000 9020).

Standard twisted pair or flat ribbon SCSI cables can be used.

Signal Name Pin Pin Signal Name

Open 1 35 open Open 2 36 open Open 3 37 open Open 4 38 open Open 5 39 GND

GND 6 40 GND GND 7 41 GND

CLKIN + 8 42 CLKIN -

D0 + 9 43 D0 D1 + 10 44 D1 D2 + 11 45 D2 D3 + 12 46 D3 D4 + 13 47 D4 D5 + 14 48 D5 D6 + 15 49 D6 D7 + 16 50 D7 D8 + 17 51 D8 -

D9 + 18 52 D9 D10 + 19 53 D10 D11 + 20 54 D11 D12 + 21 55 D12 D13 + 22 56 D13 D14 + 23 57 D14 D15 + 24 58 D15 -

Version 1.8 Page 12 of 15 SMT373 User Manual

USERDEF0 + 25 59 USERDEF0 -

WEN+ 26 60 WEN -

USERDEF1 + 27 61 USERDEF1 -

GND 28 62 GND

GND 29 63 GND

GND 30 64 open

open 31 65 open

open 32 66 open

open 33 67 open

open 34 68 open

Figure 4 External connector pin-out

Version 1.8 Page 13 of 15 SMT373 User Manual

Connectors position

LVDS0

Top Bottom

S D B 0

S D B 1

LVDS1

Figure 5 Version 1: Direct connection

Version 1.8 Page 14 of 15 SMT373 User Manual

LVDS0

S D B 0

S D B 1

Top Bottom

LVDS1

Figure 6 Version 2: Remote connection

Version 1.8 Page 15 of 15 SMT373 User Manual

Physical Layout

Figure 7 Top physical layout

Figure 8 Bottom physical layout

Sundance SMT373 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Date Comments Engineer Version

Table of Contents

Table of figure

Main features

Technical Description

Module height

Connectors Pin-out

External connector pin-out

Connectors position

Physical Layout