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AMD Geode™ LX Processors Data Book 41
Signal Definitions
33234H
3.4.7 CRT Display Interface Signals
Signal Name Ball No. Type f V Description
HSYNC AE3 I/O 0-350 Mb/s 3.3
(5vt)
Horizontal Sync. Horizontal Sync establishes
the line rate and horizontal retrace interval for an
attached CRT. The polarity is programmable
(See Section 6.8.3.2 on page 422, VP Memory
Offset 008h[8]).
VSYNC AD3 I/O 0-350 Mb/s 3.3
(5vt)
Vertical Sync. Vertical Sync establishes the
screen refresh rate and vertical retrace interval
for an attached CRT. The polarity is programma-
ble (See Section 6.8.3.2 on page 422, VP Mem-
ory Offset 008h[9]).
DVREF W1 A Analog 1.235 Video DAC Voltage Reference. Connect this
pin to a 1.235V voltage reference.
DRSET Y1 A Analog N/A DAC Current Setting Resistor. 1.21K, 1% to
DAV
SS
.
DAV
DD
[3:0] W4, V4,
V1, U1
APWR Analog 3.3 DAC Analog Power Connection.
DAV
SS
[3:0] W2, Y2,
V3, U3
AGND Analog 0 DAC Analog Ground Connection.
RED W3 A Analog N/A Red DAC Output. Red analog output.
GREEN V2 A Analog N/A Green DAC Output. Green analog output.
BLUE U2 A Analog N/A Blue DAC Output. Blue analog output.
3.4.8 VIP Interface Signals
Signal Name Ball No. Type f V Description
VIPCLK AL12 I/O
(PD)
0-75 MHz 3.3 Video Input Port Clock.
VID[7:0] AK12,
AL13,
AK13,
AJ13,
AH13,
AL15,
AK15,
AJ15
I/O
(PD)
0-150 Mb/s 3.3 Video Input Port Data.
VIPSYNC AL14 I/O
(PD)
0-150 Mb/s 3.3 Video Input Port Sync Signal.
VIP_HSYNC AE2 I 0-150 Mb/s 3.3 Video Input Port Horizontal Sync.
VIP_VSYNC AD4 I 0-150 Mb/s 3.3 Video Input Port Vertical Sync.