Hitachi HDS721050CLA362 - Table 31 Drive Address Register

HITACHI Deskstar & CinemaStar 7K1000.B & Deskstar E7K1000 Hard Disk Drive specification
48
8.7 Drive Address Register
Drive Address Register
7
6
5
4
3
2
1
0
HIZ
-WTG
-H3
-H2
-H1
-H0
-DS1
-DS0
Table 30 Drive Address Register
This register contains the inverted drive select and head select addresses of the currently selected drive.
Bit Definitions
HIZ
High Impedance. This bit is not driven and will always be in a high impedance state.
-WTG
-Write Gate. This bit is 0 when writing to the disk device is in progress.
-H3,-H2,-H1,-H0
-Head Select. These four bits are the one's complement of the binary coded address
of the currently selected head. -H0 is the least significant.
-DS1
-Drive Select 1. Drive select bit for device 1, active low. DS1=0 when device 1 (slave)
is selected and active.
-DS0
-Drive Select 0. Drive Select bit for device 0, active low. DS0=0 when device 0
(master) is selected and active.