Hitachi HTS541680J9AT00 Specifications - Page 115

Travelstar 5K160 (PATA) Hard Disk Drive Specification 14.11 Initialize Device Parameters (91h) Command Block Output Registers Register 76543210 Data -------- Feature -------- Sector Count VVVVVVVV LBA Low -------- LBA Mid -------- LBA High -------- Device - - - DHHHH Command 10010001 Command Block Input Registers Register 76543210 Data -------- Error ...See Below... Sector Count -------- LBA Low -------- LBA Mid -------- LBA High -------- Device -------- Status ...See Below... Error Register Status Register 7 6 5 4 3 2 1 0 7 6543 2 10 CRC UNC 0 IDN 0 ABT T0N AM BSY RDY DF DSC DRQ COR IDX ERR N 000 0 0V0 0 000 - - 0 -V Figure 63 Initialize Device Parameters Command (91h) The Initialize Device Parameters command enables the host to set the number of sectors per track and the number of heads minus 1, per cylinder. Words 54-58 in Identify Device Information reflects these parameters. The parameters remain in effect until the following events: • Another Initialize Device Parameters command is received. • The device is powered off. • Hard reset occurs. • Soft reset occurs and the Set Feature option of CCh is set Output Parameters To The Device Sector Count The number of sectors per track. 0 does not mean there are 256 sectors per track, but there is no sector per track. H The number of heads minus 1 per cylinder. The minimum is 0 and the maximum is 15. 115/188