Table 7-12. Crt Interface Signals; Table 7-13. Crt Display Recommended Operating Conditions - AMD Geode LX 600@0.7W Data Book

33234H
Symbol Parameter
t DOTCLK Period
CK
t DOTCLK High time
CH
t DOTCLK Low time
CL
DOTCLK long term output jitter
t Skew between RED, GREEN, BLUE Output Valid
SKEW
Note 1. Measured as per VESA requirements. The jitter is observed at its worst case point on a scan line after HSYNC
triggers up to and including the next HSYNC trigger.
Note 2. HSYNC and VSYNC for CRT timing are generated from the same on-chip clock that is used to generate the RED,
GREEN, and BLUE signals.

Table 7-13. CRT Display Recommended Operating Conditions

Symbol Parameter
V Power Supply connected to
DAC
DAV
DD
R Output Load RED, GREEN and
L
BLUE
I Output Current RED, GREEN
OUT
and BLUE
R Value of the full-scale adjust
SET
resistor connected to DRSET
VEXT External voltage reference con-
REF
nected to the DVREF pin
Note 1. There is a 75 Ω resistor on the motherboard and a 75 Ω resistor in the CRT monitor to create the effective 37.5 Ω
typical resistance.
612

Table 7-12. CRT Interface Signals

Min Typ
3.14 3.3
37.5
Note 1
1.2K
1.235
Min Max Unit
2.8
1.2
1.2
15% t
CK
0 0.6
Max Units Comments
3.46 V
Ω
One each signal.
21 mA One each signal.
Ω
This resistor should have a
1% tolerance.
V
AMD Geode™ LX Processors Data Book
Electrical Specifications
Comments
ns 350 MHz
ns 45% t
CK
ns 45% t
CK
Note 1
ns Between any
two signals
Note 2