7.3 Signal definitions
The pin assignments of interface signals are listed as follows:
(reserved)44GND43
power+ 5V motor42power+ 5V logic41
GND40ODI/ODASP-39
TTLICS1-38TTLICS0-37
TTLIDA0236TTLIDA0035
ODI/OPDIAG-34TTLIDA0133
ODOIOCS16-(*)323–stateOINTRQ31
GND30TTLIDMACK-29
TTLICSEL28ODOIORDY(*)27
GND26TTLIDIOR-(*)25
GND24TTLIDIOW-(*)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
GND02TTLIRESET-01
TypeI/OSIGNALPINTypeI/OSIGNALPIN
designates reserved pins which must be left unconnectedreserved
designates a power supply to the drivepower
designates an Open-Drain outputOD
designates an input/output commonI/O
designates an input to the driveI
designates an output from the driveO
Figure 35. Signal definition
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 defini-
tions upon the deassertion of DMACK- at the termination of the DMA burst.
Travelstar 60GH & 40GN hard disk drive specifications
42
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