Product specifications

VT8237R Data Sheet
Revision 2.06 December 15, 2004 -55- Device 15 Function 0 Serial ATA Controller Registers
SATA-Controller-Specific Configuration Registers
Offset 40 – SATA Channel Enable (03h) ........................RW
7-4 Chip ID .......................................RO, default = 0
3-2 Reserved ............................................. always reads 0
1 SATA Primary Channel Enable
0 Disable
1 Enable...................................................default
0 SATA Secondary Channel Enable
0 Disable
1 Enable...................................................default
Offset 41 – SATA Interrupt Gating (03h).......................RW
7-4 Reserved ............................................. always reads 0
3 PERR Check
0 Disable ...................................................default
1 Enable
2 SERR Check
0 Disable ...................................................default
1 Enable
1 Primary Channel Interrupt Gating
0 Disable
1 Enable...................................................default
0 Secondary Channel Interrupt Gating .......... def = 1
0 Disable
1 Enable...................................................default
Offset 42 –Native Mode Enable (F1h)............................. RW
7 Primary Channel I/O Native Mode
0 Disable
1 Enable................................................... default
6 Secondary Channel I/O Native Mode
0 Disable
1 Enable................................................... default
5 Primary Channel Interrupt Native Mode Enable
0 Disable
1 Enable................................................... default
4 Secondary Channel Interrupt Native Mode
0 Disable
1 Enable................................................... default
3-2 Reserved..............................................always reads 0
1-0 DEVSEL Timing ....................................... def = 01b
Offset 43 – FIFO Threshold Control (40h)..................... RW
7 Reserved..............................................always reads 0
6-4 Primary Channel Threshold Control ....... def = 100
3 Reserved..............................................always reads 0
2-0 Secondary Channel Threshold Control
000 Zero Threshold ...................................... default
001 1/8
010 1/4
011 3/8
100 1/2
101 5/8
110 3/4
111 7/8