Pepper Computer RS232, RS485 user manual Pinouts digital side ST1 and ST3, Cs-Slota

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

3.4.1 SMART Module Piggyback Connectors

There are two sets (one for each module) of SMART-Module piggyback connectors present on the SMART-EXT, each divided into two sets of 2x8 standard pin rows. The communication to these connectors is achieved in part via the 10-wire flat-band interface cable and directly by the MCU.

Pinouts digital side (ST1 and ST3)

Refer to figure 3.4.0.1 for the correct location of these pin-row connectors. Slot A from 68HC05C4 MCU port A (ST1)

Pin Nr.	Signal	Description	Pin Nr.	Signal	Description
1	PA1	Port A Pin 1	2	PA2	Port A Pin 2
3	PA3	Port A Pin 3	4	PA4	Port A Pin 4
5	PA5	Port A Pin 5	6	PA6	Port A Pin 6
7	PA7	Port A Pin 7	8	PA8	Port A Pin 8
9	System GND	GND	10	Serial RxD	RxD to SM-BASE
11	System VCC	System +5V VCC	12	Serial TxD	TxD from SM-BASE
13	CS-SLOTA	Chip Select A	14	Serial CLK	CLK from SM-BASE
15	Reset	Power ON/OFF Reset	16	Slot A Interrupt line	INT4 to the
					I/O Controller

Slot B from 68HC05C4 MCU port B (ST3)

Pin Nr.	Signal	Description	Pin Nr.	Signal	Description
1	PB1	Port B Pin 1	2	PB2	Port B Pin 2
3	PB3	Port B Pin 3	4	PB4	Port B Pin 4
5	PB5	Port B Pin 5	6	PB6	Port B Pin 6
7	PB7	Port B Pin 7	8	PB8	Port B Pin 8
9	System GND	GND	10	Serial RxD	RxD from SM-BASE
11	System VCC	System +5V VCC	12	Serial TxD	TxD from SM-BASE
13	CS-SLOTB	Chip Select B	14	Serial CLK	CLK from SM-BASE
15	Reset	Power ON/OFF Reset	16	Slot B Interrupt line	Interrupt PI/T (H4)

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March 12, 1996 ©1996 PEP Modular Computers GmbH Page 3 - 7