Appendix C Autoconfiguration Mode Register Values and Details
CX25870/871
Flicker-Free Video Encoder with Ultrascale Technology
Table C-8. CX25870/871 Register Values for Autoconfiguration Modes 37–42 (1 of 2)
Autoconfiguration Mode #
37
38
39
40
41
42
Auto-Config Register (index
0xB8) Hexadecimal Value:
45
46
47
50
51
52
Purpose of Mode:
Type of Digital Input:
Active Resolution:
Desktop
YCrCb
Desktop
YCrCb
Desktop
YCrCb
Desktop
RGB
Game
RGB
Desktop
RGB
640x480
800x600
800x600
800x600
320x200,
Pix_Double Set
1024x768
Overscan Ratio:
Higher
20.27
Higher
19.26
Higher
19.03
Standard
15.59
Standard
21.86
Higher
18.04
Horizontal Overscan
Ratio/Percentage (HOC):
Vertical Overscan
Ratio/Percentage (VOC):
19.79
0.48
19.34
–0.08
18.40
0.63
15.64
–0.05
30.90
–9.04
18.11
–0.07
Overscan Percentages Delta
(HOC - VOC):
H_CLKI = HTOTAL
950
650
271
1170
805
950
800
131
1170
770
2000
315
1170
1015
127
VLINES_I = VTOTAL
H_BLANKI = Horizontal
Blanking Region
323
323
453
V_BLANKI = Vertical
Blanking Region
104
125
122
105
65
150
Type of Video Output:
Frequency of CLK (Hz)
Type of Clock:
PAL-BDGHI
30875015
Pixel Only
NTSC
PAL-BDGHI NTSC
PAL-BDGHI
31500000
NTSC
56454552
Pixel Only
37999992
Pixel Only
54000000
71181793
Pixel Only
Pixel Only
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
B8
80
92
AC
72
F3
33
E9
27
00
B6
20
58
20
B0
C8
AC
2D
2A
C5
39
00
92
00
80
20
B2
D4
AA
57
31
EC
39
00
B6
20
F0
20
AA
BE
9E
F3
25
CE
38
00
92
40
E0
80
94
B0
78
09
42
CA
27
00
D0
20
C8
00
E0
FC
FA
AB
28
C8
4B
00
92
C-16
Conexant
100381B
CONEXANT [ CONEXANT SYSTEMS, INC ]
