Product specifications

VT8237R Data Sheet
Revision 2.06 December 15, 2004 -109- Device 17 Function 0 Bus Control Registers
PCI I/O Cycle Control
Offset 74 – PCI I/O Cycle Control (00h) .........................RW
7-6 Reserved ........................................ always reads 0
5 Forward LPC Cycles to External PCI Bus
0 Disable ...................................................default
1 Enable
4 Forward LAN Cycles to External PCI Bus
0 Disable ...................................................default
1 Enable
3 Forward USB 2.0 Cycles to External PCI Bus
0 Disable ...................................................default
1 Enable
2 Forward USB 1.1 Cycles to External PCI Bus
0 Disable ...................................................default
1 Enable
1 Forward SATA Cycles to External PCI Bus
0 Disable ...................................................default
1 Enable
0 Forward PATA Cycles to External PCI Bus
0 Disable ...................................................default
1 Enable
I/O Pad Control
Offset 7C – I/O Pad Control (00h) .................................. RW
7-6 Reserved ........................................always reads 0
5-4 IDE (PATA) Interface Output Drive Strength
00 Lowest ................................................... default
… …
11 Highest
3-0 Reserved ........................................always reads 0