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Table 1.Interface Pin Assignments
INTERFACE PIN ASSIGNMENT
PIN
NO.
I/O SIGNAL
NAME
HOST SIGNAL NAME PIN
NO.
I/O SIGNAL
NAME
HOST SIGNAL NAME
1 I Reset Host Reset 21 O HDRQ DMA Request
2 - GND 22 - GND
3 I/O HD7 Host Data Bus BIT 7 23 I HWR-,STOP Host I/O Write
4 I/O HD8 Host Data Bus BIT 8 24 - GND
5 I/O HD6 Host Data Bus BIT 6 25 I HRD-,
HDMARDY, -
HSTROBE
Host I/O Read
6 I/O HD9 Host Data Bus BIT 9 26 - GND
7 I/O HD5 Host Data Bus BIT 5 27 O IORDY,
DDMARDY,-
DSTROBE
I/O Channel Ready
8 I/O HD10 Host Data Bus Bit 10 28 - CSEL Cable Select
9 I/O HD4 Host Data Bus BIT 4 29 I HDAK- DMA Acknowledge
10 I/O HD11 Host Data Bus BIT 11 30 - GND
11 I/O HD3 Host Data Bus BIT 3 31 O INTRQ Host Interrupt Request
12 I/O HD12 Host Data Bus BIT 12 32 O IOCS16- Host 16 BIT I/O
13 I/O HD2 Host Data Bus BIT 2 33 I HA1 Host Address Bus BIT 1
14 I/O HD13 Host Data Bus BIT 13 34 I/O PDIAG- Passed Diagnostics
15 I/O HD1 Host Data Bus BIT 1 35 I HA0 Host Address Bus BIT 0
16 I/O HD14 Host Data Bus BIT 14 36 I HA2 Host Address Bus BIT 2
17 I/O HD0 Host Data Bus BIT 0 37 I HCS1 Host CHIP Select 0
18 I/O HD15 Host Data Bus BIT 15 38 I HCS3 Host CHIP Select 1
19 - GND 39 I/O DASP- Drive Active/Drive 1
Present
20 - (KEYPIN) 40 - GND