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Table 2–49. AT Expansion Bus Connector, D0-D19 (P2)
Pin Signal
Name
Function In/Out Current PU/PD/S *
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
D16
D17
D18
D19
GND
MEMCS16*
IOCS16*
IRQ10
IRQ11
†
IRQ15
IRQ14
DACK0*
DRQ0
DACK5*
DRQ5
DACK6*
DRQ6
DACK7*
DRQ7
+5V
MASTER*
GND
GND
Ground
16-bit Mem Access
16-bit I/O Access
Interrupt Request 10
Interrupt Request 11
Interrupt Request 15
Interrupt Request 14
DMA Acknowledge 0
DMA Request 0
DMA Acknowledge 5
DMA Request 5
DMA Acknowledge 6
DMA Request 6
DMA Acknowledge 7
DMA Request 7
+5 Volt Power
Bus Master Assert
Ground
Ground
N/A
IN
IN
IN
IN
N/C
IN
IN
OUT
IN
OUT
IN
OUT
IN
OUT
IN
N/A
IN
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
6mA
N/A
6mA
N/A
6mA
N/A
6mA
N/A
N/A
N/A
N/A
N/A
330 PU
330 PU
27K PU
27K PU
27K PU
27K PU
2.2K PD
2.2K PD
2.2K PD
2.2K PD
330 PU
* PU = pull up; PD = pull down; SER = resistance in series. All values in ohms.
† IRQ12 is not available.