ALXD800EEXJ2VD AMD (ADVANCED MICRO DEVICES), ALXD800EEXJ2VD Datasheet - Page 279

• Manufacturer Part Number: ALXD800EEXJ2VD
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of ALXD800EEXJ2VD

• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

Display Controller
6.5.1
6.5.1.1
The display modes listed in Table 6-32 are supported by
the GUI block. 32- and 24-bpp display support is provided
across all resolutions. The Dot clock source (DOTCLK) is
provided by a PLL. Available memory bandwidth deter-
mines the resolutions and color depths that will function
without display tearing. Memory controller configuration,
GLIU frequency, and other demands on the memory con-
troller set the available bandwidth. The GLIU frequency
determines the memory controller frequency. Other
demands on the memory controller such as the CPU and
bus masters affect on available bandwidth are difficult to
predict. Use of the video overlay feature additionally
decreases the bandwidth available for screen refresh.
AMD Geode™ LX Processors Data Book
Resolution
1024 x 768
640 x 480
800 x 600
1152x864
GUI Functional Overview
Display Mode Support
Color Depth (bpp)
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16, or 24/32
8, 16 or 24/32
Table 6-32. Display Modes
Refresh Rate (Hz)
100
100
100
100
60
70
72
75
85
90
60
70
72
75
85
90
60
70
72
75
85
90
60
70
72
75
85
90
The Minimum GLIU Frequency criteria listed in Table 6-32
must be met for quality operation of the display. This fre-
quency provides sufficient memory bandwidth for the mem-
ory controller to maintain reliable display refresh under all
operating conditions, including the video overlay. As a gen-
eral rule, Table 6-32 indicates what the minimum relation-
ship of DOTCLK to GLIU frequency should be at the
various color depths.
Bandwidth requirements for the VGA engine are not listed
in this table. Most graphics modes require the same band-
width as comparable 8-bpp display modes listed in Table 6-
32. Text modes generally require higher bandwidth. Sup-
ported text modes require a GLIU clock frequency of 100
MHz or more to obtain the necessary memory bandwidth.
Dot Clock (MHz)
100.187
113.310
101.420
108.000
119.650
129.600
144.000
25.175
28.560
31.500
31.500
36.000
37.889
43.163
40.000
45.720
49.500
49.500
56.250
60.065
68.179
65.000
75.000
78.750
78.750
94.500
81.600
97.520
33234C
Min. GLIU Frequency (MHz)
400
400
400
400
100
100
100
100
400
400
100
100
200
200
200
400
400
75
75
75
75
75
75
75
75
75
75
75
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