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®
Intel
855GME Chipset and Intel
Schematic Checklist Summary
12.3.4
Graphics Interfaces Checklist
12.3.4.1
Low Voltage Digital Signalling (LVDS) Checklist
Table 126
Table 126. LVDS Checklist
Pin Name
LIBG
IYAP[3:0]/
IYAM[3:0]
IYBP[3:0]/
IYBM[3:0]
ICLKAP/ICLKAM
ICLKBP/ICLKBM
DDCPCLK,
DDCPDATA
PANELVDDEN
PANELBKLTEN
PANELBKLTCTL
12.3.4.2
Digital Video Out (DVO) Checklist
Table 127
Table 127. DVO Checklist (Sheet 1 of 2)
Pin Name
DVORCOMP
GVREF
DVOCD[11:0]
DVOCCLK,
DVOCCLK#
DVOCHSYNC
DVOCVSYNC
DVOCBLANK#
278
®
6300ESB ICH Embedded Platform Design Guide
presents the LVDS checklist.
System
Pull-up/Pull-down
1.5 K Ω 1% pull-down to
GND
2.2 k to 10 k pull-up to 3.3 V
if not used.
100 k pull-down
100 k pull-down
100 k pull-down
presents the DVO checklist.
System
Pull-up/Pull-down
40.2 Ω 1% pull-down to
GND
1 K Ω 1% pull-up to
V_1P5_CORE
1 K Ω 1% pull-down to GND
When any of these LVDS data pairs are unused, they
may be left as NC. The Intel CRB routes these data
pairs directly to a 30-pin dual channel LVDS
connector.
When either of these LVDS clock pairs is not used, it
may be left as NC.
LVDS Panel DDC Clock/Data pair to collect digital
display EDID information.
Used for LVDS Panel Power control.
Used for LVDS Panel backlight enable.
Used for LVDS Panel backlight brightness control.
Figure 84
depicts the DPMS clock implementation.
Trace shall be 10-mil wide with 20-mil spacing.
Signal voltage level = 1/2 of V_1P5_CORE. Need
0.1 µF cap at GMCH pin and near ADD slot pin (if
implemented).
When unused, these signals may be left as NC.
DVO Routing is to ADD connector on Intel CRB. For
AGP these signals are: GAD[29:19] and GCBE#. See
Chapter 3.6.3 of the 855GME datasheet for exact
assignment.
When unused, these signals may be left as NC.
For AGP these signals are: GAD_STB1, GAD_STB1#.
When unused, these signals may be left as NC. For
AGP this signal is: GAD[17].
When unused, these signals may be left as NC. For
AGP this signal is: GAD[16].
When unused, these signals may be left as NC. For
AGP this signal is: GAD[18].
Notes
Notes
√
√
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