| Pin | J1/P1 | J1/P1 | J2/P2 | J2/P2 |
|---|---|---|---|---|
| Number | Row A | Row B | Row C1 | Row D1 |
| 0 | -- | -- | GND | GND |
| 1 | IOCHCHK* | GND | SBHE* | MEMCS16* |
| 2 | SD7 | RESETDRV | LA23 | IOCS16* |
| 3 | SD6 | +5V | LA22 | IRQ10 |
| 4 | SD5 | IRQ9 | LA21 | IRQ11 |
| 5 | SD4 | -5V | LA20 | IRQ12 |
| 6 | SD3 | DRQ2 | LA19 | IRQ15 |
| 7 | SD2 | -12V | LA18 | IRQ14 |
| 8 | SD1 | ENDXFR* | LA17 | DACK0* |
| 9 | SD0 | +12V | MEMR* | DRQ0 |
| 10 | IOCHRDY | (KEY) | MEMW* | DACK5* |
| 11 | AEN | SMEMW* | SD8 | DRQ5 |
| 12 | SA19 | SMEMR* | SD9 | DACK6* |
| 13 | SA18 | IOW* | SD10 | DRQ6 |
| 14 | SA17 | IOR* | SD11 | DACK7* |
| 15 | SA16 | DACK3* | SD12 | DRQ7 |
| 16 | SA15 | DRQ3 | SD13 | +5V |
| 17 | SA14 | DACK1* | SD14 | MASTER* |
| 18 | SA13 | DRQ1 | SD15 | GND |
| 19 | SA12 | REFRESH* | (KEY) | GND |
| 20 | SA11 | SYSCLK | -- | -- |
| 21 | SA10 | IRQ7 | -- | -- |
| 22 | SA9 | IRQ6 | -- | -- |
| 23 | SA8 | IRQ5 | -- | -- |
| 24 | SA7 | IRQ4 | -- | -- |
| 25 | SA6 | IRQ3 | -- | -- |
| 26 | SA5 | DACK2* | -- | -- |
| 27 | SA4 | TC | -- | -- |
| 28 | SA3 | BALE | -- | -- |
| 29 | SA2 | +5V | -- | -- |
| 30 | SA1 | OSC | -- | -- |
| 31 | SA0 | GND | -- | -- |
| 32 | GND | GND | -- | -- |
PC-104 uses the PC/PCAT card specification (IEEE P996),
but changes the form factor. The specification defines the new mechanical
foot print and card power requirements. This is a stacked bus with no
backplane or interconnecting cable. The cards plug into each other. A
PC-104 card may use an 8 bit interface (PC) or 16 bit interface (PCAT).
The PC104 bus is AC terminated to reduce power. An additional enhancement
termed PC/104-Plus allows the addition of the PCI bus onto the
card.
The PC-104 Bus pinouts shown above use the same pinout described
in the PC-AT bus. PC-104 is the PC-AT bus in a new form factor [Card
size].
The XT bus used a 62 pin connector in the PC and also with the PC-104
bus. The XT bus is used on J1 in the PC-104 bus, shown above [Also J1 on
the PC card].
The AT bus used a 38 pin connector in the PC and also with the PC-104
bus. The AT bus is used on J2 in the PC-104 bus, shown above [Also J2 on
the PC card].
Both J1 and J2 Connector used with the PC104 bus have .100" spacing, and
may be 'stack-through' (pins extend out the other side of the PWB), or
'non-stack-through (normal PWB mounting).
PC-104Plus adds an additional connector; J3 which carries the PCI
bus signals. Refer to the PCI-104 pinout page, or the PCI Bus page for a bus description and
information.
Back to the main PC104 bus page for a description, connector manufacturers, IC manufacturers and links.
Electronic Design Key words: PC/104 bus, PC-104 Pinouts, Pin Out, P1/J1 Pinout, P2/J2 Pin Out, Connector, Signal Names, Embedded Computer Bus, PCAT and PCXT pin-out, Signals, Pin Number, Assignment, Specification, Standard, Defined, Constraint, Properties, Lines, Data, Labels
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