Hitachi HTS541680J9AT00 Specifications - Page 165

Travelstar 5K160 (PATA) Hard Disk Drive Specification 14.40 Standby (E2h/96h) Command Block Output Registers Register 76543210 Data -------- Feature -------- Sector Count VVVVVVVV LBA Low -------- LBA Mid -------- LBA High -------- Device - - -D- - - - Command 11100010 Error Register 7 6 5 4 3 2 1 0 CRC UNC 0 IDN 0 ABT T0N AM N 000 0 0V0 0 Figure 119 Standby Command (E2h/96h) Command Block Input Registers Register 76543210 Data -------- Error ...See Below... Sector Count -------- LBA Low -------- LBA Mid -------- LBA High -------- Device -------- Status ...See Below... Status Register 7 6543 2 10 BSY RDY DF DSC DRQ COR IDX ERR 0V0V - 0 -V The Standby command causes the device to enter the Standby Mode immediately, and set auto power down timeout parameter(standby timer). When this command is issued, the device confirms the completion of the cached write commands before it asserts INTRQ. Then the device is spun down, but the interface remains active. If the device is already spun down, the spin down sequence is not executed. During the Standby mode the device will respond to commands, but there is a delay while waiting for the spindle to reach operating speed. The timer starts counting down when the device returns to Idle mode. Output Parameters To The Device Sector Count Timeout Parameter. If zero, the timeout interval(Standby Timer) is disabled. If other than zero, the timeout interval is set for (Timeout Parameter x5) seconds. When the automatic power down sequence is enabled, The device will enter Standby mode automatically if the timeout interval expires with no device access from the host. The timeout interval will be reinitialized if there is a device access before the timeout interval expires. 165/188