HGST TRAVELSTAR 80GN 30GB ATA5 08K0910 User Manual
Product codes
08K0910
Travelstar 80GN Hard Disk Drive Specification
56
7.11 Addressing of HDD registers
The host addresses the drive through a set of registers called a Task File. These registers are mapped into the host's
I/O space. Two chip select lines (CS0- and CS1-) and three address lines (DA00–02) are used to select one of these
registers, while a DIOR- or DIOW- is provided at the specified time.
I/O space. Two chip select lines (CS0- and CS1-) and three address lines (DA00–02) are used to select one of these
registers, while a DIOR- or DIOW- is provided at the specified time.
The chip select line CS0- is used to address the Command Block registers while the CS1- is used to address Con-
trol Block registers.
trol Block registers.
The following table shows the I/ O address map.
Table 36: I/O address map
CS0–
CS1–
DA2
DA1
DA0
DIOR– = 0 (Read)
DIOW– = 0 (Write)
Command Block Registers
0
1
0
0
0
Data Reg.
Data Reg.
0
1
0
0
1
Error Reg.
Features Reg.
0
1
0
1
0
Sector count Reg.
Sector count Reg.
0
1
0
1
1
LBA Low Reg
LBA Low Reg
0
1
1
0
0
LBA Mid Reg
LBA Mid Reg
0
1
1
0
1
LBA High Reg
LBA High Reg
0
1
1
1
0
Device Reg
Device Reg
0
1
1
1
1
Status Reg.
Command Reg.
Control Block Registers
1
0
1
1
0
Alt. Status Reg.
Device control Reg.
CS0–
CS1–
DA2
DA1
DA0
DIOR– = 0 (Read)
DIOW– = 0 (Write)