C
Appendix C Autoconfiguration Mode
Register Values and Details
Table C-1. CX25870/871 Register Values for Autoconfiguration Modes 0–4 (1 of 3)
Autoconfiguration Mode #
0
1
2
3
4
Auto-Config Register (index
0xB8) Hexadecimal Value:
00
01
02
03
04
Purpose of mode:
Type of Digital Input:
Active Resolution:
Overscan Ratio:
Desktop
RGB
Desktop
RGB
Desktop
RGB
Desktop
RGB
Desktop
YCrCb
640x480
Lower
13.79
640x480
Standard
16.56
800x600
Alternate
21.62
800x600
Lower
14.53
640x480
Lower
Horizontal Overscan
13.79
Ratio/Percentage (HOC):
Vertical Overscan
Ratio/Percentage (VOC):
13.58
0.21
16.67
–0.11
11.52
10.10
13.19
1.34
13.58
0.21
Overscan Percentages Delta
(HOC - VOC):
H_CLKI = HTOTAL
784
600
126
944
625
266
880
735
66
960
750
140
784
600
126
VLINES_I = VTOTAL
H_BLANKI = Horizontal
Blanking Region
V_BLANKI = Vertical
Blanking Region
75
90
86
95
75
Type of Video Output:
Frequency of CLK (Hz)
Type of Clock:
NTSC
PAL-BDGHI
29500008
NTSC
PAL-BDGHI
36000000
NTSC
28195793
38769241
28195793
Pixel or
Character
Pixel or
Character
Pixel or
Character
Pixel or
Character
Pixel or
Character
100381B
Conexant
C-1
CONEXANT [ CONEXANT SYSTEMS, INC ]
