Appendix C Autoconfiguration Mode Register Values and Details
CX25870/871
Flicker-Free Video Encoder with Ultrascale Technology
Table C-3. CX25870/871 Register Values for Autoconfiguration Modes 11–15 (1 of 2)
Autoconfiguration Mode #
11
12
13
14
15
Auto-Config Register (index
0xB8) Hexadecimal Value:
13
14
15
16
17
Purpose of Mode:
Type of Digital Input:
Active Resolution:
Desktop
RGB
Game
RGB
Game
RGB
Desktop
YCrCb
Desktop
YCrCb
1024x768
320x240,
Pix_Double Set
320x240,
Pix_Double Set
1024x768
1024x768
Overscan Ratio:
Standard
13.44
Standard
13.79
Standard
15.84
Higher
15.11
Higher
13.44
Horizontal Overscan
Ratio/Percentage (HOC):
Vertical Overscan
Ratio/Percentage (VOC):
14.24
–0.80
13.58
0.21
19.79
–3.95
14.81
0.30
14.24
–0.80
Overscan Percentages Delta
(HOC - VOC):
H_CLKI = HTOTAL
1400
975
1568
300
1800
325
1176
975
1400
975
VLINES_I = VTOTAL
H_BLANKI = Horizontal
Blanking Region
329
349
385
133
329
V_BLANKI = Vertical
Blanking Region
131
37
50
130
131
Type of Video Output:
Frequency of CLK (Hz)
Type of Clock:
PAL-BDGHI
68249989
NTSC
PAL-BDGHI
29250000
NTSC
PAL-BDGHI
68249989
28195793
68727276
Pixel or
Character
Pixel or
Character
Pixel or
Character
Pixel or
Character
Pixel or
Character
Register
Value
Register
Value
Register
Value
Register
Value
Register
Value
Register Address
0x38
0x76
0x78
0x7A
0x7C
0x7E
0x80
0x82
0x84
0x86
0x88
0x8A
20
60
00
D6
FE
E6
87
2B
F8
4B
00
78
40
00
80
84
96
60
7D
22
D5
27
00
20
40
50
80
8A
A4
66
B7
32
EA
27
00
08
20
60
00
D8
F2
EE
71
24
D0
4B
00
98
20
60
00
D6
FE
E6
87
2B
F8
4B
00
78
C-6
Conexant
100381B
CONEXANT [ CONEXANT SYSTEMS, INC ]
