Appendix C Autoconfiguration Mode Register Values and Details
CX25870/871
Flicker-Free Video Encoder with Ultrascale Technology
Table C-4. CX25870/871 Register Values for Autoconfiguration Modes 16–21 (1 of 2)
Autoconfiguration Mode #
16
17
18
19
20
21
Auto-Config Register (index
0xB8) Hexadecimal Value:
Reserved
21
22
23
Reserved
25
Purpose of Mode:
Type of Digital Input:
Active Resolution:
Overscan Ratio:
Desktop
RGB
Desktop
RGB
Desktop
RGB
Desktop
YCrCb
640x480
Lower
13.63
800x600
Lower
13.79
800x600
Standard
16.42
640x480
Lower
Horizontal Overscan
13.63
Ratio/Percentage (HOC):
Vertical Overscan
Ratio/Percentage (VOC):
13.19
0.44
13.58
0.21
15.97
0.45
13.19
0.44
Overscan Percentages Delta
(HOC - VOC):
H_CLKI = HTOTAL
950
600
271
1176
750
950
775
131
950
600
271
VLINES_I = VTOTAL
H_BLANKI = Horizontal
Blanking Region
329
V_BLANKI = Vertical
Blanking Region
76
94
109
76
Type of Video Output:
Frequency of CLK (Hz)
Type of Clock:
PAL-BDGHI
28500011
Pixel Only
NTSC
PAL-BDGHI
36812508
Pixel Only
PAL-BDGHI
28500011
Pixel Only
52867138
Pixel or
Character
Register
Value
Register
Value
Register
Value
Register
Value
Register Address
0x38
0x76
0x78
0x7A
0x7C
0x7E
0x80
0x82
0x84
0x86
0x88
0x8A
0x8C
00
20
80
86
A0
60
9D
29
FC
27
00
B6
0F
20
C0
20
A6
BA
98
D9
22
D4
38
00
98
49
00
34
20
AE
CE
A0
2B
2D
F4
39
00
B6
83
00
20
80
86
A0
60
9D
29
FC
27
00
B6
0F
C-8
Conexant
100381B
CONEXANT [ CONEXANT SYSTEMS, INC ]
