Travelstar 5K160 (PATA) Hard Disk Drive Specification
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7.3 Signal
definitions
The pin assignments of interface signals are listed as follows:
PIN SIGNAL
I/O
Type PIN
SIGNAL
I/O
Type
01 RESET-
I
TTL 02
GND
03 DD07
I/O 3–state
04
DD08
I/O
3–state
05 DD06
I/O 3–state
06
DD09
I/O
3–state
07 DD05
I/O 3–state
08
DD10
I/O
3–state
09 DD04
I/O 3–state
10
DD11
I/O
3–state
11 DD03
I/O 3–state
12
DD12
I/O
3–state
13 DD02
I/O 3–state
14
DD13
I/O
3–state
15 DD01
I/O 3–state
16
DD14
I/O
3–state
17 DD00
I/O 3–state
18
DD15
I/O
3–state
19 GND
(20)
Key
21 DMARQ
O
3–state
22
GND
23 DIOW-(*) I
TTL 24
GND
25 DIOR-(*) I
TTL 26
GND
27 IORDY(*) O
OD 28
CSEL
I
TTL
29 DMACK- I
TTL 30
GND
31 INTRQ
O
3–state
32
(reserved)
33 DA01
I
TTL 34
PDIAG- I/O
OD
35 DA00
I
TTL 36
DA02
I
TTL
37 CS0-
I
TTL 38
CS1-
I
TTL
39 DASP-
I/O OD 40
GND
41
+ 5V logic
power
42
+ 5V motor
power
43 GND
44
(reserved)
Table 22. Signal definition
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
power
designates a power supply to the drive
reserved
designates reserved pins which must be left unconnected
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.
Special
Definition
(for Ultra DMA)
Conventional Definition
DDMARDY- IORDY
HSTROBE DIOR-
Write Operation
STOP DIOW-
HDMARDY- DIOR-
DSTROBE IORDY
Read Operation
STOP DIOW-
Table 23. Special signal definitions for Ultra DMA