IBM IC25N005ATDA04, Specifications

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7.3 Signal definitions
The pin assignments of interface signals are listed as follows:
(reserved) 44 GND 43
power + 5V motor 42 power + 5V logic 41
GND 40 OD I/O DASP- 39
TTL I CS1- 38 TTL I CS0- 37
TTL I DA02 36 TTL I DA00 35
OD I/O PDIAG- 34 TTL I DA01 33
OD O IOCS16(*)- 32 3–state O INTRQ 31
GND 30 TTL I DMACK- 29
TTL I CSEL 28 3–state O IORDY(*) 27
GND 26 TTL I DIOR(*)- 25
GND 24 TTL I DIOW(*)- 23
GND 22 3–state O DMARQ 21
Key (20) GND 19
3–state I/O DD15 18 3–state I/O DD00 17
3–state I/O DD14 16 3–state I/O DD01 15
3–state I/O DD13 14 3–state I/O DD02 13
3–state I/O DD12 12 3–state I/O DD03 11
3–state I/O DD11 10 3–state I/O DD04 09
3–state I/O DD10 08 3–state I/O DD05 07
3–state I/O DD09 06 3–state I/O DD06 05
3–state I/O DD08 04 3–state I/O DD07 03
GND 02 TTL I RESET- 01
Type I/O SIGNAL PIN Type I/O SIGNAL PIN
Figure 38. Table of signals
Notes:
"O" designates an output from the Drive.
"I" designates an input to the Drive.
"I/O" designates an input/output common.
"OD" designates an Open-Drain output.
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.
"power" designates a power supply to the drive.
"reserved" designates reserved pins which must be left unconnected.
Travelstar 48GH, 30GN & 15GN hard disk drive specifications
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