Datasheet

Travelstar 80GN Hard Disk Drive Specification
154
Note 1. When the Feature register is 03h (= Set Transfer mode) the Sector Count Register specifies the transfer
mechanism. The upper 5 bits define the type of transfer and the low order 3 bits encode the mode value.
When the Feature Register is 05h (=Enable Advanced Power Management) the Sector Count Register specifies the
Advanced Power Management level.
Note 2. If the number of auto reassigned sectors reaches the device's reassignment capacity, the write cache func-
tion will be automatically disabled. Although the device still accepts the Set Features command (with Feature reg-
ister = 02h) without error, the write cache function will remain disabled. For the current write cache function status,
refer to the Identify Device Information (129 word) by the Identify Device command.
Hard reset or power off must not be done during the first 5 seconds after write command completion when write
cache is enabled.
Note 3. When the Feature register is 85h (=Disable Advanced Power Management), the deepest Power Saving
mode becomes Active Idle. .
PIO Default Transfer Mode 00000 000
PIO Default Transfer Mode, Disable IORDY 00000 001
PIO Flow Control Transfer Mode X 00001 nnn (nnn=000,001,010,011,100)
Multiword DMA mode x 00100 nnn (nnn=000,001,010)
Ultra DMA mode x 01000 nnn (nnn=000,001,010,011,100)
C0h-FEh The deepest Power Saving Mode is Active Idle
80h-BFh The deepest Power Saving Mode is Low Power Idle
01h-7Fh The deepest Power Saving Mode is Standby
00h, FFh Aborted