Hitachi 7K320 Specifications - Page 45

7K320 SATA OEM Specification 11.1 Register naming convention This specification uses the same naming conventions for the Command Block Registers as the ATA8-ACS standard. However, the register naming convention is different from that uses in the Serial ATA 2.6 specification. The following table defines the corresponding of the register names used in this specification with those used in the Serial ATA 2.6 specification. Serial ATA register name Features Register name in this specification when writing registers Feature current Register name in this specification when reading registers Features (exp) Feature previous Sector count Sector count current Sector count HOB=0 Sector count (exp) Sector count previous Sector count HOB=1 LBA low LBA low current LBA low HOB=0 LBA low (exp) LBA low previous LBA low HOB=1 LBA mid LBA mid current LBA mid HOB=0 LBA mid (exp) LBA mid previous LBA mid HOB=1 LBA high LBA high current LBA mid HOB=0 LBA high (exp) LBA high previous LBA mid HOB=1 Device Device Device Command Command N/A Control Device Control N/A Status N/A Status Error N/A Table 24 Register naming convention and correspondence Error 11.2 Command register This register contains the command code being sent to the device. Command execution begins immediately after this register is written. The command set is shown in "Table 40 Command set" on page 72. All other registers required for the command must be set up before writing the Command Register. 11.3 Device Control Register Device Control Register 7 6 5 4 3 2 1 0 - - - - 1 SRST -IEN 0 Table 25 Device Control Register Page 45 of 176