NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
- 1128 -
Revision V1.30
NUC97
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CHNIC
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CRTC Internal Horizontal Retrace Timing Register (CRTC_HR)
The internal horizontal retrace timing can be controlled by properly setting the values of retrace
starting (HRS) and ending (HRE) registers included in this register. The values are programmed
in number of pixels.
Register
Offset
R/W
Description
Reset Value
CRTC_HR
0x18
R/W
CRTC Internal Horizontal Retrace Timing Register
0x0000_0000
31
30
29
28
27
26
25
24
Reserved
HRE[10:8]
23
22
21
20
19
18
17
16
HRE[7:0]
15
14
13
12
11
10
9
8
Reserved
HRS[10:8]
7
6
5
4
3
2
1
0
HRS[7:0]
Bits
Description
[31:27]
Reserved
Reserved.
[26:16]
HRE
CRTC Internal Horizontal Retrace End Low
An 11-bit value programmed in pixels, at which the Internal Horizontal Retrace becomes
inactive.
[15:11]
Reserved
Reserved.
[10:0]
HRS
CRTC Internal Horizontal Retrace Start Timing
An 11-bit value programmed in pixels, at which the Internal Horizontal Retrace becomes
active.