Appendix C Autoconfiguration Mode Register Values and Details
CX25870/871
Flicker-Free Video Encoder with Ultrascale Technology
Table C-9. CX25870/871 Register Values for Autoconfiguration Modes 43–47 (1 of 2)
Autoconfiguration Mode #
43
44
45
46
47
Auto-Config Register (index
0xB8) Hexadecimal Value:
53
54
55
56
57
Purpose of Mode:
Desktop
DVD/noninterlaced Game
input
Desktop for
Brazil
Desktop for
Argentina
Type of Digital Input:
Active Resolution:
RGB
RGB
RGB
RGB
RGB
1024x768
720x480
320x200,
Pixel_Double Set
640x480
640x480
Overscan Ratio:
Higher
16.20
16.67
–0.47
Very Low (DVD
Playback)
Standard
Standard
13.79
13.58
0.21
Standard
16.56
Horizontal Overscan
Ratio/Percentage (HOC):
1.24
1.23
0.01
20.20
Vertical Overscan
Ratio/Percentage (VOC):
21.40
16.67
Overscan Percentages Delta
(HOC - VOC):
–1.20
–0.11
H_CLKI = HTOTAL
1410
1000
337
880
525
140
1848
275
784
600
126
944
625
266
VLINES_I = VTOTAL
H_BLANKI = Horizontal
Blanking Region
429
V_BLANKI = Vertical
Blanking Region
147
36
43
75
90
Type of Video Output:
PAL-BDGHI
NTSC
NTSC
PAL-M (Brazil)
PAL-Nc
(Argentina)
Frequency of CLK (Hz)
Type of Clock:
70499989
Pixel Only
27692310
30461552
28195793
Pixel Only
29500008
Pixel Only
Pixel or Character
Pixel or Character
Register
Value
Register
Value
Register
Value
Register Address
Register Value
Register Value
0x38
0x76
0x78
0x7A
0x7C
0x7E
0x80
0x82
0x84
0x86
0x88
24
C0
00
DC
08
F0
BF
2F
F1
4B
00
00
E0
D0
82
92
5C
1B
13
F2
26
00
40
90
80
90
A2
72
CD
2B
C2
27
00
00
00
80
84
A4
6A
7D
22
D4
27
00
00
60
80
8A
A6
70
C1
2E
F2
27
00
C-18
Conexant
100381B
CONEXANT [ CONEXANT SYSTEMS, INC ]
