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DISK DRIVE OPERATION
SpinPoint V40 Product Manual
45
Table 6-2 lists the signal name mnemonic, connector pin number, whether input to (I) or output from (O) the
drive, and the full signal name.
Table 6-2 Interface Signals Description
Signal Pin DIR Description
CS1FX- 37 I Drive chip Select 0
CS3FX- 38 I Drive chip Select 1
DA0 35 I Drive Address Bus - Bit 0
DA1 33 I - Bit 1
DA2 36 I - Bit 2
DASP- 39 I/O Drive Active/Slave Present
DD0 17 I/O Drive Data Bus - Bit 0
DD1 15 I/O - Bit 1
DD2 13 I/O - Bit 2
DD3 11 I/O - Bit 3
DD4 9 I/O - Bit 4
DD5 7 I/O - Bit 5
DD6 5 I/O - Bit 6
DD7 3 I/O - Bit 7
DD8 4 I/O - Bit 8
DD9 6 I/O - Bit 9
DD10 8 I/O - Bit 10
DD11 10 I/O - Bit 11
DD12 12 I/O - Bit 12
DD13 14 I/O - Bit 13
DD14 16 I/O - Bit 14
DD15 18 I/O - Bit 15
DIOR- 25 I Drive I/O Read
DIOW- 23 I Drive I/O Write
DMACK- 29 I DMA Acknowledge
DMARQ 21 O DMA Request
INTRQ 31 O Drive Interrupt
IOCS16- 32 O Drive 16-bit I/O
IORDY 27 O I/O Channel Ready
PDIAG- 34 I/O Passed Diagnostics
RESET- 1 I Drive Reset
Key pin 20
Pin used for keying the interface
connector
NOTE: A minus sign follows the name of any signal that is asserted as active low.
Direction (DIR) is in reference to the drive:
IN indicates input to the drive.
OUT indicates output from the drive.
I/O indicates that the signal is bi-directional.