Appendix C Autoconfiguration Mode Register Values and Details
CX25870/871
Flicker-Free Video Encoder with Ultrascale Technology
Table C-2. CX25870/871 Register Values for Autoconfiguration Modes 5–10 (1 of 2)
Autoconfiguration Mode #
5
6
7
8
9
10
Auto-Config Register (index
0xB8) Hexadecimal Value:
05
06
07
10
11
12
Purpose of Mode:
Desktop
Desktop
Desktop
Boot-Up
Screen
Boot-Up
Screen
Desktop
Type of Digital Input:
Active Resolution:
Overscan Ratio:
YCrCb
YCrCb
YCrCb
800x600
Lower
14.53
RGB
RGB
RGB
640x480
Standard
16.56
800x600
Alternate
21.62
640x400
Standard
17.47
640x400
Standard
15.12
1024x768
Standard
15.11
Horizontal Overscan
Ratio/Percentage (HOC):
Vertical Overscan
Ratio/Percentage (VOC):
16.67
–0.11
11.52
10.10
13.19
1.34
17.70
–0.23
13.19
1.93
14.81
0.30
Overscan Percentages Delta
(HOC - VOC):
H_CLKI = HTOTAL
944
625
266
880
735
66
960
750
140
936
525
259
1160
500
1176
975
VLINES_I = VTOTAL
H_BLANKI = Horizontal
Blanking Region
363
133
V_BLANKI = Vertical
Blanking Region
90
86
95
76
64
130
Type of Video Output:
Frequency of CLK (Hz)
Type of Clock:
PAL-BDGHI
29500008
NTSC
PAL-BDGHI
36000000
NTSC
PAL-BDGHI
28999992
NTSC
38769241
29454552
68727276
Pixel or
Character
Pixel or
Character
Pixel or
Character
Pixel or
Character
Pixel or
Character
Pixel or
Character
Register
Value
Register
Value
Register
Value
Register
Value
Register
Value
Register
Value
Register Address
0x38
0x76
0x78
0x7A
0x7C
0x7E
0x80
0x82
0x84
0x86
0x88
0x8A
00
60
80
8A
A6
68
C1
2E
F2
27
00
B0
00
A0
20
B6
CE
B4
55
20
D8
39
00
70
00
00
20
AA
CA
9A
0D
29
FC
39
00
C0
00
50
80
8A
9C
6A
A9
27
CA
27
00
A8
00
40
80
88
A2
64
AF
29
FC
27
00
88
20
60
00
D8
F2
EE
71
24
D0
4B
00
98
C-4
Conexant
100381B
CONEXANT [ CONEXANT SYSTEMS, INC ]
