Pepper Computer RS232, RS485 SPI Connectors ST5 and BU1, Pinouts for this 10-pin connector

Chapter 3 SMART-EXT SMART I/O User’s Manual

3.4.3 SPI Connectors (ST5 and BU1)

On both sides of the board are standard 2x5 pinrow connectors (BU1, ST5), that provide the interface connection between SMART-EXT units and the

SMART-BASE.

A 10-wire flat cable is soldered directly on the left-hand side of the board (BU1), that interfaces the SMART-BASE module or other (earlier cascaded) SMART-EXT modules.

Pinouts for this 10-pin connector

Pin Nr.	Signal	Pin Nr.	Signal
1	System VCC (+5V)	2	Serial RxD from SMART-BASE
3	System VCC (+5V)	4	Serial TxD from SMART-BASE
5	Serial Ext. Select	6	Serial CLK from SMART-BASE
7	System GND	8	Reset (Power ON/OFF)
9	System GND	10 (BU1)	Serial Ext. Interrupt
			(INT4 1st Module only)
		10 (ST5)	N/C

Note

Pin 10 of BU1 is only useful on the first SMART-EXT connected to the SMART-BASE. For this reason, SMART-Modules utilizing this feature can only be connected to the first slot of the first extension unit.

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March 12, 1996 ©1996 PEP Modular Computers GmbH Page 3 - 9