Hitachi HTS541680J9AT00 Specifications - Page 172

Travelstar 5K160 (PATA) Hard Disk Drive Specification 14.47 Write Long (32h/33h) Command Block Output Registers Register 76543210 Data -------- Feature -------- Sector Count 00000001 LBA Low VVVVVVVV LBA Mid VVVVVVVV LBA High VVVVVVVV Device - L - DHHHH Command 0 0 1 1 0 0 1R Command Block Input Registers Register 76543210 Data -------- Error ...See Below... Sector Count V LBA Low VVVVVVVV LBA Mid VVVVVVVV LBA High VVVVVVVV Device - - - - HHHH Status ...See Below... Error Register 7 6 5 4 3 2 1 0 CRC UNC 0 IDN 0 ABT T0N AM N 000V0V0 0 Figure 126 Write Long Command (32h/33h) Status Register 7 6543 2 10 BSY RDY DF DSC DRQ COR IDX ERR 0 VVV - 0 - V The Write Long command transfers the data and the ECC bytes of the designated one sector from the host to the device, then the data and the ECC bytes are written to the disk media. After 512 bytes of data have been transferred, the device will keep setting DRQ=1 to indicate that the device is ready to receive the ECC bytes from the host. The data is transferred 16 bits at a time, and the ECC bytes are transferred 8 bits at a time. The number of ECC bytes are 4 or 52 according to setting of Set Feature option. The default number after power on is 4 bytes. Output Parameters To The Device Sector Count The number of continuous sectors to be transferred. The Sector Count must be set to one. LBA Low The sector number of the sector to be transferred. (L=0) In LBA mode, this register contains LBA bits 0 - 7. (L=1) LBA High/Mid The cylinder number of the sector to be transferred. (L=0) In LBA mode, this register contains LBA bits 8 - 15 (Mid), 16 - 23 (High). (L=1) H The head number of the sector to be transferred. (L=0) In LBA mode, this register contains LBA bits 24 - 27. (L=1) R The retry bit, but this bit is ignored. Input Parameters From The Device Sector Count The number of requested sectors not transferred. LBA Low The sector number of the sector to be transferred. (L=0) In LBA mode, this register contains current LBA bits 0 - 7. (L=1) LBA High/Mid The cylinder number of the sector to be transferred. (L=0) In LBA mode, this register contains current LBA bits 8 - 15 (Mid), 16 - 23 (High). (L=1) H The head number of the sector to be transferred. (L=0) In LBA mode, this register contains current LBA bits 24 - 27. (L=1) The file internally uses 52 bytes of ECC on all data read or writes. The 4 byte mode of operation is provided via an emulation technique. As a consequence of this emulation it is recommended that 52 byte ECC mode is used for all tests to confirm the operation of the files ECC hardware. Unexpected results may occur if such testing is performed using 4 byte mode. 172/188