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5.1.2
Signal definition(PATA model)
The pin assignments of interface signals are listed in the figure below:
PIN
SIGNAL
01
RESET-
03
DD7
05
DD6
07
DD5
09
DD4
11
DD3
13
DD2
15
DD1
17
DD0
19
GND
21
DMARQ
23
DIOW-(*)
25
DIOR-(*)
27
IORDY(*)
29
DMACK-
31
INTRQ
33
DA1
35
DA0
37
CSO-
39
DASP-
Table 11 Table of signals
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. "OC" designates open-collector or 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.
Write Operation
Read Operation
Table 12 Signal special definitions for Ultra DMA
HITACHI Deskstar & CinemaStar P7K500 Hard Disk Drive specification (Rev 1.1)
I/O
Type
I
TTL
I/O
3-state
I/O
3-state
I/O
3-state
I/O
3-state
I/O
3-state
I/O
3-state
I/O
3-state
I/O
3-state
O
3-state
I
TTL
I
TTL
O
3-state
I
TTL
O
3-state
I
TTL
I
TTL
I
TTL
I/O
OC
Special Definition
(for Ultra DMA)
DDMARDY-
HSTROBE
STOP
HDMARDY-
DSTROBE
STOP
17
PIN
SIGNAL
02
GND
04
DD8
06
DD9
08
DD10
10
DD11
12
DD12
14
DD13
16
DD14
18
DD15
(20)
key
22
GND
24
GND
26
GND
28
CSEL
30
GND
32
I
34
PDIAG-
36
DA2
38
CS1-
40
GND
Conventional Definition
IORDY
DIOR-
DIOW-
DIOR-
IORDY
DIOW-
I/O
Type
I/O
3-state
I/O
3-state
I/O
3-state
I/O
3-state
I/O
3-state
I/O
3-state
I/O
3-state
I/O
3-state
I
TTL
I/O
OC
I
TTL
I
TTL
- Quick Links:
- Data Sheet
- Jumper Settings(Pata Model)
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