Hitachi IC25N080ATMR04-0 Specifications - Page 66
Addressing of HDD registers
UPC - 000000114196
View all Hitachi IC25N080ATMR04-0 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 66 highlights
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. The chip select line CS0- is used to address the Command Block registers while the CS1- is used to address Control 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) Travelstar 80GN Hard Disk Drive Specification 56