2.0 Internal Registers
CX25870/871
2.4 Reading Registers
Flicker-Free Video Encoder with Ultrascale Technology
Table 2-5. Programming Detail For All Read/Write Registers (4 of 16)
Bit/Register
Bit Location
Names
Bit/Register Definition
CONFIG[5:0]
Bits [6:4] and bits The combination of CONFIG[5:3] and CONFIG[2:0] determines the autoconfiguration
[2:0]–B8
mode entered by the CX25870/871 immediately after register 0xB8 is written. Check
Appendix C for a list of all register values by autoconfiguration mode.
CONFIG
[5:0]
Input
Format Resolution
Active
Output
Output Ratio
Mode
000000 = RGB
000001 = RGB
000010 = RGB
000011 = RGB
640x480 NTSC
Overscan = Lower
Mode 0
Mode 1
Mode 2
Mode 3
Mode 4
Mode 5
Mode 6
Mode 7
Mode 8
Mode 9
Mode 10
Mode 11
640x480 PAL-BDGHI Overscan = Standard
800x600 NTSC Overscan = Alternate
800x600 PAL-BDGHI Overscan = Lower
Overscan = Lower
000101 = YCrCb 640x480 PAL-BDGHI Overscan = Standard
000110 = YCrCb 800x600 NTSC Overscan = Alternate
000111 = YCrCb 800x600 PAL-BDGHI Overscan = Lower
000100 = YCrCb 640x480 NTSC
001000 = RGB
001001 = RGB
001010 = RGB
001011 = RGB
001100 = RGB
001101 = RGB
640x400 NTSC
640x400 PAL-BDGHI Overscan = Standard
1024x768 NTSC Overscan = Standard
1024x768 PAL-BDGHI Overscan = Standard
320x240 NTSC
320x240 PAL-BDGHI Pix Double Set = Standard Mode 13
Overscan = Standard
Pix Double Set = Standard Mode 12
001110 = YCrCb 1024x768 NTSC
001111 = YCrCb 1024x768 PAL-BDGHI Overscan = Higher
010000 = Reserved
Overscan = Higher
Mode 14
Mode 15
Mode 16
Mode 17
Mode 18
Mode 19
Mode 20
Mode 21
Mode 22
Mode 23
Mode 24
010001 = RGB
010010 = RGB
010011 = RGB
010100 = Reserved
640x480 PAL-BDGHI Overscan = Lower
800x600 NTSC Overscan = Lower
800x600 PAL-BDGHI Overscan = Standard
010101 = YCrCb 640x480 PAL-BDGHI Overscan = Lower
010110 = YCrCb 800x600 NTSC Overscan = Lower
010111 = YCrCb 800x600 PAL-BDGHI Overscan = Standard
011000 = RGB
720x400 NTSC
9-dot font for DOS
Overscan =Standard
011001 = RGB
720x400 PAL-BDGHI 9-dot font for DOS
Overscan =Standard
Mode 25
011010 = RGB
011011 = Reserved
011100 = YCrCb 720x480 NTSC
1024x768 NTSC
Overscan = Lower
Mode 26
Mode 27
Mode 28
Interlaced Input, Slave
Interface Overscan = 0%
DIV2 set
2-12
Conexant
100381B
CONEXANT [ CONEXANT SYSTEMS, INC ]
