Appendix C Autoconfiguration Mode Register Values and Details
CX25870/871
Flicker-Free Video Encoder with Ultrascale Technology
Table C-7. CX25870/871 Register Values for Autoconfiguration Modes 31–36 (1 of 2)
Autoconfiguration Mode #
31
32
33
34
35
36
Auto-Config Register (index
0xB8) Hexadecimal Value:
Reserved
40
41
42
43
44
Purpose of Mode:
Type of Digital Input:
Active Resolution:
Overscan Ratio:
Desktop
RGB
Desktop
RGB
Desktop
RGB
Desktop
RGB
Desktop
YCrCb
640x480
Higher
18.34
640x480
Higher
20.27
800x600
Higher
19.26
800x600
Higher
19.03
640x480
Higher
18.34
Horizontal Overscan
Ratio/Percentage (HOC):
Vertical Overscan
Ratio/Percentage (VOC):
19.34
–1.00
19.79
0.48
19.34
–0.08
18.40
0.63
19.34
–1.00
Overscan Percentages Delta
(HOC - VOC):
H_CLKI = HTOTAL
770
645
113
950
650
271
1170
805
950
800
131
770
645
113
VLINES_I = VTOTAL
H_BLANKI = Horizontal
Blanking Region
323
V_BLANKI = Vertical
Blanking Region
100
104
125
122
100
Type of Video Output:
Frequency of CLK (Hz)
Type of Clock:
NTSC
PAL-BDGHI
30875015
Pixel Only
NTSC
PAL-BDGHI
37999992
Pixel Only
NTSC
29769241
Pixel Only
56454552
Pixel Only
29769241
Pixel Only
Register
Value
Register
Value
Register
Value
Register
Value
Register
Value
Register Address
0x38
0x76
0x78
0x7A
0x7C
0x7E
0x80
0x82
0x84
0x86
0x88
0x8A
0x8C
00
64
80
8C
9E
6E
B5
2A
C5
27
00
02
71
00
B8
80
92
AC
72
F3
33
E9
27
00
B6
0F
20
58
20
B0
C8
AC
2D
2A
C5
39
00
92
43
00
80
20
B2
D4
AA
57
31
EC
39
00
B6
83
00
64
80
8C
9E
6E
B5
2A
C5
27
00
02
71
C-14
Conexant
100381B
CONEXANT [ CONEXANT SYSTEMS, INC ]
