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56
Pin Name
Pin No.
I/O
Destination
Function
HRSTB 160
5I
ATAPI
ATAPI IF
control
signal
(host
reset
signal)
DA2
DA1
DA0
195
192
194
5I ATAPI
ATAPI IF
register
address
signal
DATA[15:0] 180,
178,
172, 170,
168, 166,
164, 162,
161, 163,
165, 167,
169, 171,
177, 179,
5IO ATAPI
ATAPI IF
data
bus
DREQ 181
5TO
ATAPI
ATAPI IF
DMA
request
signal
ZIOWB 182
5I
ATAPI
ATAPI IF
write
strobe
pulse
ZIORB 183
5I
ATAPI
ATAPI IF
read
strobe
pulse
IORDY
184
5TO ATAPI
ATAPI IF control signal (drive Ready)
DACKB
185
5I
ATAPI
ATAPI IF DMA acknowledge
HINTRQ 186
5TO
ATAPI
ATAPI IF
drive
interrupt
signal
IOCS16B 187 5TO
ATAPI ATAPI IF
control
signal
(16-bit
transfer)
PDIAGB 193
5IO
ATAPI
ATAPI IF
control
signal
CS1FXB
CS3FXB
196
197
5I ATAPI
ATAPI IF
register
chip
select
signal
DASPB 198
5IO
ATAPI
ATAPI IF
control
signal
1.4.3 ATAPI Interface Pin List