7.3 Signal definitions
The pin assignments of interface signals are listed as follows:
(reserved)44GND43
power+ 5V motor42power+ 5V logic41
GND40ODI/O–DASP39
TTLI–CS138TTLI–CS037
TTLIDA0236TTLIDA0035
ODI/O–PDIAG34TTLIDA0133
ODO–IOCS16(*)323–stateOINTRQ31
GND30TTLI–DMACK29
TTLICSEL28ODOIORDY(*)27
GND26TTLI–DIOR(*)25
GND24TTLI–DIOW(*)23
GND223–stateODMARQ21
Key(20)GND19
3–stateI/ODD15183–stateI/ODD0017
3–stateI/ODD14163–stateI/ODD0115
3–stateI/ODD13143–stateI/ODD0213
3–stateI/ODD12123–stateI/ODD0311
3–stateI/ODD11103–stateI/ODD0409
3–stateI/ODD10083–stateI/ODD0507
3–stateI/ODD09063–stateI/ODD0605
3–stateI/ODD08043–stateI/ODD0703
GND02TTLI–RESET01
TypeI/OSIGNALPINTypeI/OSIGNALPIN
Notes:
1. "O" designates an output from the Drive.
2. "I" designates an input to the Drive.
3. "I/O" designates an input/output common.
4. "OD" designates an Open-Drain output.
5. The signal lines marked with (*) are redefined during the Ultra DMA protocol to provide special
functions. These lines change from the conventional to special definitions at the moment the Host
decides to allow a DMA burst, if the Ultra DMA transfer mode was previously chosen via
SetFeatures. The Drive becomes aware of this change upon assertion of the -DMACK line. These
lines revert back to their original definitions upon the deassertion of DMACK at the termination of
the DMA burst.
6. "power" designates a power supply to the drive.
7. "reserved" designates reserved pins which must be left unconnected.
Figure 33. Table of signals
Travelstar 32GH/30GT/20GN hard disk drive specifications
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