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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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