Hitachi HTS541040G9AT00 Specifications - Page 54

Signal definitions - dma

Page 54 highlights

7.3 Signal definitions The pin assignments of interface signals are listed as follows:Signal definitions Table 25: Signal definitions PIN SIGNAL I/O Type 01 RESET- I TTL 03 DD07 I/O 3-state 05 DD06 I/O 3-state 07 DD05 I/O 3-state 09 DD04 I/O 3-state 11 DD03 I/O 3-state 13 DD02 I/O 3-state 15 DD01 I/O 3-state 17 DD00 I/O 3-state 19 GND 21 DMARQ O 3-state 23 DIOW-(*) I TTL 25 DIOR-(*) I TTL 27 IORDY(*) O 3-state 29 DMACK- I TTL 31 INTRQ O 3-state 33 DA01 I TTL 35 DA00 I TTL 37 CS0- I TTL 39 DASP- I/O OD 41 + 5V logic power 43 GND PIN SIGNAL 02 GND 04 DD08 06 DD09 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 reserved 34 PDIAG- 36 DA02 38 CS1- 40 GND 42 + 5V motor 44 (reserved) I/O I/O I/O I/O I/O I/O I/O I/O I/O I I/O I I power Type 3-state 3-state 3-state 3-state 3-state 3-state 3-state 3-state TTL OD TTL TTL O I I/O OD power reserved designates an output from the drive designates an input to the drive designates an input/output common designates an Open-Drain output designates a power supply to the drive 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 desertion of DMACK at the termination of the DMA burst. Travelstar 5K100 Hard Disk Drive Specification 40

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Travelstar 5K100 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 desertion of
DMACK at the termination of the DMA burst.
Table 25: 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