CX25870/871
Appendix C Autoconfiguration Mode Register Values and Details
Flicker-Free Video Encoder with Ultrascale Technology
Table C-6. CX25870/871 Register Values for Autoconfiguration Modes 27–30 (2 of 2)
Autoconfiguration Mode #
27
28(5)
29(5)
30
0x8E
0x90
13
06
13
F0
31
00
40
00
00
8C
0A
E5
76
C1
89
9A
1F
7C
F0
21
13
38
16
20
35
00
40
00
00
8C
24
F0
59
CF
93
A4
CB
8A
09
2A
04
B1
73
00
3F
9A
A9
5D
74
1D
0A
E5
74
77
43
85
2F
A1
BD
14
0x92
0x94
0x96
0x98
0x9A
0x9C
0x9E
0xA0
0xA2
0xA4
0xA6
0xA8
0xAA
0xAC
0xAE
0xB0
0xB2
0xB4
NOTE(S):
1. RGB digital input denotes that the CX25870/871 will be configured to receive the RGB default pixel input mode after an
autoconfiguration command, which is 24-bit, RGB-multiplexed (i.e., IN_MODE[3:0] = 0000). If the desired RGB pixel input
mode is NOT 24-bit RGB multiplexed, the CX25870/871's IN_MODE[3:0] bits must be programmed to the desired RGB pixel
input mode immediately before initiating a write to the CONFIG[5:0] bits.
2. YCrCb digital input denotes that the CX25870/871 will be configured to receive YCrCb pixel data after an autoconfiguration
command. The CX25870/871's IN_MODE[3:0] bits must be programmed to the desired YCrCb pixel input mode immediately
before initiating a write to the CONFIG[5:0] bits.
3. CX25870/871 registers not listed in this table (including IN_MODE[3:0]) do not get reprogrammed as a result of an
autoconfiguration command.
4. Pixel or Character signifies that this overscan ratio is acceptable for 8-clock per character graphics controllers or pixel-clock
controllers.
(5)
The CX25870/871 will be in master interface immediately after any autoconfiguration mode EXCEPT Mode 28 and Mode 29.
6. Mode 44 would ideally have 858 clocks per line. However, since 858 is not a multiple of 8, then 880 clocks per line was
utilized instead.
7. These autoconfiguration values assume a 13.500 MHz crystal resides between the XTALIN and XTALOUT pins. If the
14318_XTAL bit is set, then these autoconfiguration values will automatically change to reflect the presence of a 14.318 MHz
crystal.
100381B
Conexant
C-13
CONEXANT [ CONEXANT SYSTEMS, INC ]
