Hitachi HTS541010G9AT00 Specifications - Page 57
Registers - specs
UPC - 000061425019
View all Hitachi HTS541010G9AT00 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 57 highlights
9.0 Registers In Serial ATA, the host adapter contains a set of registers that shadow the contents of the traditional device registers, referred to as the Shadow Register Block. Shadow Register Block registers are interface registers used for delivering commands to the device or posting status from the device. About details, please refer to the Serial ATA Spec. In the following cases, the host adapter sets the BSY bit in its shadow Status Register and then transmits a frame to the device containing the new regster contents. - Command register is written in the Shadow Register Block - Device Control register is written in the Shadow Register Block with a change of state of the SRST bit - COMRESET is requested 9.1 Register naming convention This specification uses the same naming conventions for the Command Block Registers as the ATA/ATAPI-6 standard. However, the register naming convention is different from that uses in the Serial ATA 1.0a specification. Figure 1 defines the corresponding of the register names used in this specification with those used in the Serial ATA 1.0a specification. Serial ATA register name Register name in this specification when writing registers Register name in this specification when reading registers Features Feature current Features (exp) Feature previous Sector count Sector count current Sector count HOB=0 Sector count (exp) Sector count previous Sector count HOB=1 Sector number LBA low current LBA low HOB=0 Sector number (exp) LBA low previous LBA low HOB=1 Cylinder low LBA mid current LBA mid HOB=0 Cyliner low (exp) LBA mid previous LBA mid HOB=1 Cylinder high LBA high current LBA mid HOB=0 Cylinder high (exp) LBA high previous LBA mid HOB=1 Device/head Device Device Command Command N/A Control Device Control N/A Status N/A Status Error N/A Error 9.2 Command Register Travelstar 5K100 (Serial ATA) Hard Disk Drive Specification 45