Set Transfer Mode; Write Cache; Advanced Power Management - Hitachi ic35l060avv207-0 - Deskstar 60 GB Hard Drive Specifications

85H
86H
89H
AAH
BBH
C2H
CCH
DDH
Note: After a power on reset of hard reset the device is set to the following features as default:

Write cache

ECC bytes
Read look-ahead
Reverting to power on defaults
Release interrupt

11.37.1 Set Transfer mode

When Feature register is 03h (= Set Transfer mode), the Sector Count Register specifies the transfer
mechanism. The upper 5 bits defines the type of transfer and the low order 3 bits encodes the mode
value.
PIO Default Transfer Mode
PIO Default Transfer Mode, Disable IORDY
PIO Flow Control Transfer Mode x
Multiword DMA mode x
Ultra DMA mode x
11.37.2 Write Cache
If the number of auto reassigned sectors reaches the reassignment capacity of the device, the write
cache function will automatically be disabled. Although the device still accepts the Set Features com-
mand with Feature register = 02h without error, the write cache function remains disabled. For current
write cache function status refer to Figure 101 "Identify Device Information" (word 85 or 129) on page
121.

11.37.3 Advanced Power Management

When the value in the Feature register is 05h (= Enable Advanced Power Management), the Sector
Count Register specifies the Advanced Power Management level.
FFH Aborted
C0 - FEh The deepest Power Saving mode is Normal Idle mode (the same as Disable
Advanced Power Management
80 - BFh The lowest power consumption mode is Low power Idle mode
01 - 7Fh The lowest power consumption mode is Low RPM standby mode
00H Aborted
Disable Advanced Power Management
Disable Power-up in Standby mode
Disable Address Offset mode
Enable read look-ahead feature
4 bytes of ECC apply on Read Long/Write Long commands
Disable Automatic Acoustic Management
Enable reverting to power on defaults
Disable release interrupt
Deskstar 180GXP hard disk drive specifications
: Enable
: 4 bytes
: Enable
: Disable
: Disable
00000 000
00000 001
00001 nnn (nnn=000,001,010,011,100)
00100 nnn (nnn=000,001,010)
01000 nnn (nnn=000,001,010,011,100,101)
176