6.1.2 Signal definition
The pin assignments of interface signals are listed in the figure below:
GND
40
OC
I/O
DASP-
39
TTL
I
CS1-
38
TTL
I
CSO-
37
TTL
I
DA2
36
TTL
I
DA0
35
OC
I/O
PDIAG-
34
TTL
I
DA1
33
OC
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
DD0
17
3-state
I/O
DD14
16
3-state
I/O
DD1
15
3-state
I/O
DD13
14
3-state
I/O
DD2
13
3-state
I/O
DD12
12
3-state
I/O
DD3
11
3-state
I/O
DD11
10
3-state
I/O
DD4
09
3-state
I/O
DD10
08
3-state
I/O
DD5
07
3-state
I/O
DD9
06
3-state
I/O
DD6
05
3-state
I/O
DD8
04
3-state
I/O
DD7
03
GND
02
TTL
I
RESET-
01
Type
I/O
SIGNAL
PIN
Type
I/O
SIGNAL
PIN
Figure 19. 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.
6. (**) complies with ATA-2.
DIOR-
IORDY
DIOW-
HDMARDY-
DSTROBE
STOP
Read Operation
IORDY
DIOR-
DIOW-
DDMARDY-
HSTROBE
STOP
Write Operation
Conventional Definition
Special Definition
(for Ultra DMA)
Figure 20. Signal special definitions for Ultra DMA
Deskstar 120GXP hard disk drive specifications
22
Summary of Contents for IC35L040AVVN07-0 - 40GB IDE Deskstar 120GXP 7200RPM UATA-100...
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