Product specifications

VT8601A Apollo PLE133
Revision 1.82 October 22, 2001 -88- VGA Extended Registers
Technologies, Inc.
Delivering Value
Delivering ValueDelivering Value
Delivering Value
GR28-27 – GPIO Control..................................................RW
15-8 GPIO Direction 7-0
0 Read ..................................................... default
1 Write
7-0 GPIO Data 7-0...........................................default = 0
GR2A – Suspend Pin Timer..............................................RW
7 Motion Video Port Suspend
0 Disable ................................................... default
1 Enable
6-0 Reserved .........................................always reads 0
GR2C – Miscellaneous Pin Control..................................RW
7 Reserved .........................................always reads 0
6 Use PDINV pin as GPIO5
0 Disable ................................................... default
1 Enable
5-4 Reserved .........................................always reads 0
3 Use INT# pin as PSTATUS
0 Disable ................................................... default
1 Enable
2 Tristate P35-0, DE, SFCLK, LP, FLM
0 Tristate ................................................... default
1 Enable
1 Tristate ENPVEE, ENPVDD, ENPBLT
0 Tristate ................................................... default
1 Enable
0 Reserved .........................................always reads 0
GR2F – Miscellaneous Internal Control..........................RW
7 PCLK Control
0 VGA Compatible....................................default
1 PCLK equals VCLK
6 Reserved ......................................... always reads 0
5 Hsync Skew Control
0 One skew in graphics, two skew in text .default
1 No skew
4-3 Reserved .........................................always reads 0
2 Double Logical Line Width
0 Disable ....................................................default
1 Enable
1 Text Mode Display FIFO Prefetch Cycles Select
0 Multiple of 8 ...........................................default
1 Multiple of 4
0 Enable Display FIFO Threshold Control
0 Disable ....................................................default
1 Enable (can also be enabled by AR10[0])