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Prestigio Cavaliere 141
5. Pin Descriptions of Major Components
5.2 SiS650 (IGUI Host Memory Controller )
VB Inter face
Na m e
Pin Attr
VBCLK
I
Channel B/A Clock Input
1.8V/3.3V - M
VBCLK multiplexed with SBA0
VBHCLK
O
VB Programming Interface Clock
1.8V/3.3V – M
VBHCLK multiplexed with RBF#
VBCAD
I/O
VB Programming Interface Data
1.8V/3.3V – M
VBCAD multiplexed with AREQ#
VBCT L[1:0]
O
VB Data Control
1.8V/3.3V - M
VBCT L[1:0] multiplexed with AAD[29:28]
VGPIO[3:2]
I/O
VB GPIO pins
3.3V - M
VGPIO[3:2] multiplexed with PIPE#/WBF#
VBHSYNC
I/O
Channel B H-Sync
1.8V/3.3V - M
VBHSYNC multiplexed with AAD30
VBVSYNC
I/O
Channel B V-Sync
1.8V/3.3V - M
VBVSYNC multiplexed with AAD31
VBDE
I/O
Channel B Data Valid
1.8V/3.3V - M
VBDE multiplexed with AAD27
VBGCLK
I/O
Channel B Clock Output.
1.8V/3.3V - M
T his clock is used to trigger dual edge data transfer.
Perfect duty cycle is required.
VBGCLK multiplexed with AD_ST B1
VBD[11:0]
I/O
Channel B Data
1.8V/3.3V - M
VBD[11:0] multiplexed with AAD
VAHSYNC
I/O
Channel A H-Sync
1.8V/3.3V - M
VAHSYNC multiplexed with AAD18
VAVSYNC
I/O
Channel A V-Sync
1.8V/3.3V - M
VAVSYNC multiplexed with AAD17
VADE
I/O
Channel A Data Valid
1.8V/3.3V - M
VADE multiplexed with AAD16
VAGCLK
I/O
Channel A Clock Output.
1.8V/3.3V - M
T his clock is used to trigger dual edge data transfer.
Perfect duty cycle is required.
VAGCLK multiplexed with AD_ST B0
VAGCLK#
I/O
Channel A Differential Clock Output. (T o support
1.8V/3.3V - M
Chrontel).
VAGCLK# multiplexed with AD_ST B0#
VAD[11:0]
I/O
Channel A Data
1.8V/3.3V - M
VAD[11:0] multiplexed with AAD
Sign a l De scr iption
VGA Inter face
Na m e
Pin Attr
VOSCI
I
14.318 Reference Clock Input
3.3V - M
HSYNC
O
Horizontal Sync
3.3V - M
VSYNC
O
Vertical Sync
3.3V - M
INT A#
O
Internal VGA Interrupt Pin
3.3V - M
VGPIO[1:0]
I/O
Internal VGA GPIO pins
3.3V - M
VCOMP
AI
Compensation Pin
Analog - M
VRSET
AI
Reference Resistor
Analog - M
VVBWN
AI
Voltage Reference
Analog - M
ROUT
AO
Red Signal Output
Analog - M
GOUT
AO
Green Signal Output
Analog - M
BOUT
AO
Blue Signal Output
Analog - M
83
Technical Service Manual
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