5K320 SATA OEM Specification
When 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.
| bits | bits |
|
| (7:3) | (2:0) |
|
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=000,001,010,011,100,101) |
When Feature register is 05h (=Enable Advanced Power Management), the Sector Count Register specifies the Advanced Power Management level.
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 |
Note 2.
If the number of auto reassigned sectors reaches the device’s reassignment capacity, the write cache function will be automatically disabled. Although the device still accepts the Set Features command (with Feature register = 02h) without error, the write cache function will remain disabled. For current write cache function status, please refer to the Identify Device Information(129word) by Identify Device command. Power off must not be done in 5 seconds after write command completion when write cache is enabled.
Note 3.
When Feature register is 85h (=Disable Advanced Power Management), the deepest Power Saving mode becomes Active Idle.
Note 4.
When the Feature register is set to 10h or 90h, the value set to the Sector Count register specifies the specific Serial ATA feature to enable or disable.
When the Feature register is set to 10h or 90h, the value set to the Sector Count register specifies the specific Serial ATA feature to enable or disable.
Sector count value | Description |
01h | |
02h | DMA setup FIS |
03h | |
04h | Guaranteed |
06h | Software Settings Preservation |