EL640.480-A SB Series Operations Manual (020-0358-00A)
13
Table 8. 400 Row VGA Modes.
Description
Unit
Note
T1 Vertical Border
7
tHS
1
T2 Vertical Front Porch
6
tHS
2
T3 VS Pulse Width
2
tHS
3
T4 Vertical Back Porch
27
tHS
T5 Vertical Border
7
tHS
1
HS pulses / VS
449
VS frequency
70
Hz
Description 320
320(13
)
360 640 720 Unit
Note
T6 Horizontal Border
8
4
9
8
9
tVCLK
4
T7 Horizontal Front
Porch
1-3 5-7 4 8/11 9/13
tVCLK
5
T8 HS Pulse Width
32-51
32-51 52-60 64-103
104-111
tVCLK 6
T9 Horizontal Back Porch 13 18
14 37/40 40/45
tVCLK
T10 Horizontal Border
8
4
9
8
9
tVCLK
7
VCLK pulses / HS
400
400
450
800
900
HS period
31.8
31.8
31.8
31.8
µs
1. Borders are displayed but otherwise
ignored by the display controller,
value is for typical system timing.
2. Min. (80-T1-T3-T4-T5 [in tHS]) x 3.3 µs
+ 50 µs.
3. Min. 1 x tVCLK.
4. Size of removed border in 640 and 720
column modes.
5. Used to detect 320,320(13) and 360 column
modes. Typical values are 3, 6 and 4
respectively.
6. Used to detect column mode. Typical values
are 48, 96 and 108 for 320, 320(13), 640 and
720 column modes respectively.
7. Size of removed border in 320, 320(13) and
360 modes.
Table 9. 640 Columns x 480 Rows VGA Modes.
Description
Unit
Note
T1 Vertical Border
8
tHS
1
T2 Vertical Front Porch
3
tHS
1
T3 VS Pulse Width
2
tHS
2
T4 Vertical Back Porch
24
tHS
1
T5 Vertical Border
8
tHS
3
HS pulses / VS
525
VS frequency
60
Hz
T6 Horizontal Border
8
tVCLK
3
T7 Horizontal Front Porch
8/11
tVCLK
1
T8 HS Pulse Width
64…103
tVCLK
4
T9 Horizontal Back Porch
37/40
tVCLK
1
T10 Horizontal Border
8
tVCLK
1
VCLK pulses / HS
800
HS period
31.8
µs
1. Value is for typical system timing
2. Min. 1 x tVCLK.
