Product specifications

VT8237R Data Sheet
Revision 2.06 December 15, 2004 -58- Device 15 Function 0 Serial ATA Controller Registers
SATA Transport Control Registers
Offset 50 – Software Ctrl Power Mode Request (00h)...RW
7 External PHY Port2 SLUMBER Request ... def = 0
6 External PHY Port2 PARTIAL Request..... def = 0
5 External PHY Port1 SLUMBER Request ... def = 0
4 External PHY Port1 PARTIAL Request..... def = 0
3 Internal PHY Port2 SLUMBER Request .... def = 0
2 Internal PHY Port2 PARTIAL Request...... def = 0
1 Internal PHY Port1 SLUMBER Request .... def = 0
0 Internal PHY Port1 PARTIAL Request...... def = 0
The internal request is triggered by rising edge of each bit.
Offset 51 – Hardware Ctrl Power Mode (00h) ...............RW
7 Change Drive & Let Idle Device Enter Power
Mode
0 Disable ...................................................default
1 Enable
6 Change Drive Power Mode Selection for Idle
Device
0 Partial .....................................................default
1 Slumber
5 Reserved ............................................. always reads 0
4 Enter to Partial Process (Item1) Disabled
0 Disable ...................................................default
1 Enable
3 Enter to Slumber Process (Item2) Disabled
0 Disable ...................................................default
1 Enable
2-0 Power Clock Select
000 T = 1t......................................................default
001 T = 2t
…
1. Power Mode Control Process: Partial will be
requested if transport idle for at least 2T.
2. Slumber will be requested if transport layer idle
for at least 10 T. t = 0.425s
Offset 52 – Transport Miscellaneous Control (00h).......RW
7 Reserved ............................................always reads 0
6 Transport Issue Early Request to Link to improve
Performance ............................................. default = 0
5 Reserved ............................................always reads 0
4 Signal Data FIS Transmission ................ default = 0
Allow over 8k bytes.
3 BIST FIS................................................... default = 0
Controller can accept BIST FIS when behaves as a
device (Rx53[1:0] are set). This bit is set only for
controller to control BIST FIS self-test.
2 SATA Flow Control Water Flag
0 Based on FIFO threshold value (Rx43)..default
1 32DW
1 COMRESET (test mode only) ................ default = 0
For reset both master / slave device.
0 Reset Shadow (test mode only) ............... default = 0
SATA Link Control Registers
Offset 56 – Internal PHY SATA Link Control (00h)..... RW
7 Reserved..............................................always reads 0
6 Receive Scrambler
0 Enable.................................................... default
1 Disable
5 Transmit Scrambler
0 Enable.................................................... default
1 Disable
4 Align Primitive Transmission
0 Enable.................................................... default
1 Disable
3 Continue Primitive Transmission
0 Enable.................................................... default
1 Disable
2 Continue Primitive after Align
0 Disable................................................... default
1 Enable
1 Double OOB Burst Number (6 to 12)
0 Disable................................................... default
1 Enable
0 SATA Link Dynamic Clock Gating
0 Enable.................................................... default
1 Disable
Offset 57 – External PHY SATA LITE Control (00h) .. RW
7 Reserved..............................................always reads 0
6 Receive Scrambler
0 Enable.................................................... default
1 Disable
5 Transmit Scrambler
0 Enable.................................................... default
1 Disable
4 Align Primitive Transmission
0 Enable.................................................... default
1 Disable
3 Continue Primitive Transmission
0 Enable.................................................... default
1 Disable
2 Continue Primitive after Align
0 Disable................................................... default
1 Enable
1 Double OOB Burst Number (6 to 12)
0 Disable................................................... default
1 Enable
0 SATA Lite Dynamic Clock Gating
0 Enable.................................................... default
1 Disable