7.7.2.2
VOnLCDTIMING1 - Vertical axis panel control register
This register specifies the synchronization and data timining of a frame by the
following:
•
vertical synchronization pulse width in lines
•
vertical front forch width in lines
•
vertical back porch width in lines
•
lines/frame
The time of one line is the period of VOnHSYNC, i.e. T
VOnHSYNC
= 1/f
VOnHSYNC
.
Access
This register can be read/written in 32-bit units.
Address
<VOn_Base> + 004
H
Initial Value
0000 0000
H
. This register is initialized by any reset.
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
VBP[7:0]
VFP[7:0]
R/W
R/W
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
VSW[5:0]
LPP[9:0]
R/W
R/W
Bit
Bit name
Function
31 to 24
VBP[7:0]
Vertical back porch width
VBP[7:0] is the number of inactive lines at the start of a frame, after vertical
synchronization period.
The actual vertical back porch width is VBP[7:0] • T
VOnHSYNC
,
thus spans the range 0 to 255 lines.
23 to 16
VFP[7:0]
Vertical front porch width
VFP[7:0] is the number of inactive lines at the end of frame, before vertical
synchronization period.
The actual vertical front porch width is VFP[7:0] • T
VOnHSYNC
,
thus spans the range 0 to 255 lines.
15 to 10
VSW[5:0]
Vertical synchronization pulse width
VSW[7:0] specifies the width of VOnVSYNC in number of horizontal synchronization
lines.
The actual VOnVSYNC width is (VSW[7:0] + 1) • T
VOnHSYNC
,
thus spans the range 1 to 64 lines.
9 to 0
LPP[9:0]
Lines/frame
LPP[9:0] specifies the number of horizontal synchronization lines per frame.
The actual number of lines/frame is LPP[9:0] + 1,
thus spans the range 1 to 1024 lines/frame.
Video Output
Chapter 7
Preliminary User's Manual S19203EE1V3UM00
203
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