GXLV Datasheet, PDF (139/247 Pages) National Semiconductor (TI) – Geode™ GXLV Processor Series Low Power Integrated x86 Solutions

Integrated Functions (Continued)
Table 4-27. CRT Display Modes (Note 1)
Resolution
Simultaneous
Colors
Refresh Rate
(Hz)
DCLK Rate
(MHz)
(Note 2)
PCLK Rate
(MHz)
(Note 3)
640x480
8-bpp
256 colors out of a
palette of 256
60
50.35
25.175
72
63.0
31.5
75
63.0
31.5
85
72.0
36.0
16-bpp
64 KB colors
RGB 5-6-5
60
50.35
25.175
72
63.0
31.5
75
63.0
31.5
85
72.0
36.0
800x600
8-bpp
256 colors out of a
palette of 256
60
80.0
40.0
72
100.0
50.0
75
99.0
49.5
85
112.5
56.25
16-bpp
64 KB colors
RGB 5-6-5
60
80.0
40.0
72
100.0
50.0
75
99
49.9
85
112.5
56.25
1024x768
8-bpp
256 colors out of a
palette of 256
60
65.0
65.0
70
75.0
75.0
75
78.5
78.5
85
94.5
94.5
16-bpp
64 KB colors
RGB 5-6-5
60
65.0
65.0
70
75.0
75.0
75
78.5
78.5
85
94.5
94.5
1280x1024
8-bpp
256 colors out of a
palette of 256
60
108.0
108.0
75
135.0
135
Notes: 1. This list is not meant to be an complete list of all the possible supported CRT display modes.
2. DCLK is the input clock from the Geode I/O companion. In some cases, DCLK is doubled to keep the
Geode I/O companion’s PLL in a desired operational range.
3. PCLK is the graphics output clock to the Geode I/O companion.
Revision 1.1
139
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