Hitachi HTS541680J9AT00 Specifications - Page 168
Write DMA Cah/CBh
UPC - 683728200794
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Travelstar 5K160 (PATA) Hard Disk Drive Specification 14.43 Write DMA (Cah/CBh) Command Block Output Registers Register 76543210 Data -------- Feature -------- Sector Count VVVVVVVV LBA Low VVVVVVVV LBA Mid VVVVVVVV LBA High VVVVVVVV Device - L - DHHHH Command 1 1 0 0 1 0 1R Command Block Input Registers Register 76543210 Data -------- Error ...See Below... Sector Count VVVVVVVV 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 V0 0V0V0 0 Figure 122 Write DMA Command (CAh/CBh) Status Register 7 6543 2 10 BSY RDY DF DSC DRQ COR IDX ERR 0 VVV - 0 - V The Write DMA command transfers one or more sectors of data from the host to the device, then the data is written to the disk media. The sectors of data are transferred through the Data Register 16 bits at a time. The host initializes a slave-DMA channel prior to issuing the command. Data transfers are qualified by DMARQ and are performed by the slave-DMA channel. The device issues only one interrupt per command to indicate that data transfer has terminated and status is available. If an uncorrectable error occurs, the write will be terminated at the failing sector. Output Parameters To The Device Sector Count The number of continuous sectors to be transferred. If zero is specified, then 256 sectors will be transferred. LBA Low The sector number of the first 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 first 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 first 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. This will be zero, unless an unrecoverable error occurs. LBA Low The sector number of the last transferred sector. (L=0) In LBA mode, this register contains current LBA bits 0 - 7. (L=1) LBA High/Mid H The cylinder number of the last transferred sector. (L=0) In LBA mode, this register contains current LBA bits 8 - 15 (Mid), 16 - 23 (High). (L=1) The head number of the last transferred sector. (L=0) In LBA mode, this register contains current LBA bits 24 - 27. (L=1) 168/188