Travelstar 80GN Hard Disk Drive Specification
40
7.3 Signal definitions
The pin assignments of interface signals are listed as follows:Signal definitions
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.
Table 24: Signal definitions
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
3–state
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)
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
Содержание IC25N020ATMR04
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