Register; Table 40: Register Set - Hitachi HTS421212H9AT00 - Travelstar 120 GB Hard Drive Specifications

10.0 Register

Table 40: Register Set

Addresses
CS0- CS1-
N N
N A
N A
N A
N A
A N
A N
A N
A N
A N
A N
A N
A N
A N
A N
A N
A N
A A
Logic conventions: A = signal asserted
Communication to or from the device is through an I/O Register that routes the input or output data to or from the
registers addressed by the signals from the host (CS0-, CS1-, DA2, DA1, DA0, DIOR- and DIOW).
The Command Block Registers are used for sending commands to the device or posting status from the device.
The Control Block Registers are used for device control and to post alternate status.
DA2 DA1 DA0
x x
0 x
1 0
1 1
1 1
0 0
0 0
0 1
0 1
0 1
1 0
1 0
1 0
1 0
1 1
1 1
1 1
x x
N = signal not asserted
x = either A or N
Travelstar 4K120 Hard Disk Drive Specification
READ (DIOR-)
x Data bus high impedence
Control block registers
x Data bus high impedance
x Data bus high impedance
0 Alternate Status
1 Device Address
Command block registers
0 Data
1 Error
0 Sector Count
1 LBA Low
1 LBA bits 0-7
0 LBA Mid
0 LBA bits 8-15
1 LBA High
1 LBA bits 16-23
0 Device
0 LBA bits 24-27
1 Status
x Invalid address
63
Functions
WRITE (DIOW-)
Not used
Not used
Not used
Device Control
Not used
Data
Features
Sector Count
LBA Low
LBA bits 0-7
LBA Mid
LBA bits 8-15
LBA High
LBA bits 16-23
Device
LBA bits 24-27
Command
Invalid address