JVC XV-521BK Service Manual page 37

Symbol I/O
Pin NO.
NPDIAG
133 I/O
VSS
134
135 DA1 I/O
NIOCS16
136 O
INTRQ
137 O
138 VDD
NDMACK
139
IORDY
140 O
141 NIORD
VSS
142
143 NIOWR I/O
144 DMARQ O
Function
ATAPI slave master diagnosis input
- GND
ATAPI host address (Not use)
ATAPI output of selection of width of host data bus
ATAPI host interruption output
- Apply 3V
I ATAPI host DMA response (Not use)
ATAPI host ready output (Connect to TP157)
I ATAPI host read (Not use)
- GND
ATAPI host writes
ATAPI host DMA request (Connect to TP159)
XV-521BK/523GD/522SL
1-37