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PC/104-Bus Chapter: Connectors

Beckhoff New Automation Technology CB4053 page 21

4.5 PC/104-Bus

An onboard LPC-to-ISA bridge (Fintek® F85226F) makes it possible to expand the functionality of the

board with additional PC/104 cards. This interface offers full 16bit ISA compliance. For further information

on this interface please refer to the PC/104 specifications (see "Specifications and Documents", p. 12).

NOTE

The chipset used on this board does not support ISA-DMA functionality.

Pinning of the standard 8 bit PC/104 connector.

Description Name Pin Name Description

ISA - IO channel check IOCHK# A1 B1 GND ground

ISA – data 7 SD7 A2 B2 RSTDRV reset drive

ISA – data 6 SD6 A3 B3 VCC 5 volt supply

ISA – data 5 SD5 A4 B4 IRQ9 ISA – interrupt 9 (2)

ISA – data 4 SD4 A5 B5 -5V -5 volt supply

ISA – data 3 SD3 A6 B6 (DRQ2) reserved

ISA – data 2 SD2 A7 B7 -12V -12 volt supply

ISA – data 1 SD1 A8 B8 IOCHRDY ISA – IO channel ready

ISA – data 0 SD0 A9 B9 12V 12 volt supply

ISA – IO channel ready IOCHRDY A10 B10 N/C reserved

ISA – address enable AEN A11 B11 SMEMW# ISA – system memory write

ISA – address 19 SA19 A12 B12 SMEMR# ISA – system memory read

ISA – address 18 SA18 A13 B13 IOW# ISA – IO write

ISA – address 17 SA17 A14 B14 IOR# ISA – IO read

ISA – address 16 SA16 A15 B15 (DACK3#) reserved (pulled high)

ISA – address 15 SA15 A16 B16 (DRQ3) reserved

ISA – address 14 SA14 A17 B17 (DACK1#) reserved (pulled high)

ISA – address 13 SA13 A18 B18 (DRQ1) reserved

ISA – address 12 SA12 A19 B19 REFRESH# ISA – refresh

ISA – address 11 SA11 A20 B20 SYSCLK ISA – system clock

ISA – address 10 SA10 A21 B21 IRQ7 ISA – interrupt 7

ISA – address 9 SA9 A22 B22 IRQ6 ISA – interrupt 6

ISA – address 8 SA8 A23 B23 IRQ5 ISA – interrupt 5

ISA – address 7 SA7 A24 B24 IRQ4 ISA – interrupt 4

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