14
Application
Note
BIOS Field
BIOS Value
Notes
Type
Custom
We would enter custom parameters
Resolution
640x480
Obtained from the TFT-LCD datasheet, this is a characteristic.
Dot Clock (MHz)
25
Referring Table 6 CLK (1/Tc) Typical value. The reported value
25.175MHz is approximated to 25Mhz
HSync FP
2
Referring Table 6 HSync Front Porch (thf) Typical value. The
reported value 16CLK.
So the value you've to enter the BIOS is 2 to obtain 16 = ( 2 x 8 )
HSync AT
12
Referring Table 6 HSync Pulse width (thp*) Typical value. The
reported value 96CLK.
The value you've to enter the BIOS is 12 to obtain 96 = ( 12 x 8 )
HSync BP
6
Referring Table 6 HSync Pulse Back-porch (thb*) Typical value.
The reported value 48CLK.
The value you've to enter the BIOS is 6 to obtain 48 = ( 6 x 8 )
VSync FP
12
Referring Table 6 VSync Front Porch (tvf) Typical value. The
reported value 12CLK.
VSync AT
2
Referring Table 6 VSync Pulse width (tvp*) Typical value. The
reported value 2 H.
VSync BP
31
Referring Table 6 VSync Back Porch (thb*) Typical value. The
reported value 31CLK.
Table 7.
Flat Panel BIOS parameters
Timings Diagrams
The followings images show a graphical mode to represent timing data. The information is not represented in
the same graphical order shown into the Flat Panel BIOS setup, but the contents are the same.
Figure 3.
Timing Diagram Horizontal Mode
