CX25870/871
2.0 Internal Registers
Flicker-Free Video Encoder with Ultrascale Technology
2.4 Reading Registers
Table 2-5. Programming Detail For All Read/Write Registers (5 of 16)
Bit/Register
Bit Location
Names
Bit/Register Definition
011101 =YCrCb 720x576 PAL-BDGHI Interlaced Input, Slave
Mode 29
Interface Overscan = 0%
DIV2 set
011110 = YCrCb 1024x768 NTSC
Overscan = Lower
Mode 30
Mode 31
Mode 32
Mode 33
Mode 34
Mode 35
Mode 36
Mode 37
Mode 38
Mode 39
Mode 40
011111 = Reserved
100000 = RGB
100001 = RGB
100010 = RGB
100011 = RGB
640x480 NTSC
Overscan = Higher
640x480 PAL-BDGHI Overscan = Higher
800x600 NTSC Overscan = Higher
800x600 PAL-BDGHI Overscan = Higher
Overscan = Higher
100101 = YCrCb 640x480 PAL-BDGHI Overscan = Higher
100110 = YCrCb 800x600 NTSC Overscan = Higher
100111 = YCrCb 800x600 PAL-BDGHI Overscan = Higher
100100 = YCrCb 640x480 NTSC
101000 = RGB
101001 = RGB
800x600 NTSC
320x200 PAL-BDGHI Pix Double Set Overscan = Mode 41
Standard
Overscan = Standard
101010 = RGB
101011 = RGB
101100 = RGB
1024x768 NTSC
1024x768 PAL-BDGHI Overscan = Higher
720x480 NTSC
320x200 NTSC
Overscan = Higher
Mode 42
Mode 43
Mode 44
Noninterlaced Input for
DVD Overscan = Very Low
Pix Double Set Overscan = Mode 45
Standard
Overscan = Standard
101101 = RGB
101110 = RGB
101111 = RGB
640x480 PAL-M
(Brazil)
640x480 PAL-Nc
Mode 46
Overscan = Standard
Mode 47
(Argentina)
CSC_SEL
Bit 0–32
This bit is only effective when OUT_MODE[1:0] = 11, HDTV_EN = 1, and RASTER_SEL is
nonzero.
0 = Standard color space conversion for RGB to Y (R-Y) (B-Y) based on
Y =0 .299R +0 .587G +0 .114 B (DEFAULT)
1 = HDTV color space conversion for RGB to Y (R-Y) (B-Y) based on
Y = 0.2126R + 0.7152G + 0.0722B
CVBSD_INV
DACDISA
Bit 2–D8
Bit 0–BA
0 = Normal operation. (DEFAULT)
1 = Invert CVBS_DLY output.
No more than 1 DAC should be disabled at any time.
0 = Normal operation. (DEFAULT)
1 = Disables DACA output. Current is set to 0 mA; output will go to 0 V.
DACDISB
Bit 1–BA
No more than 1 DAC should be disabled at any time.
0 = Normal operation. (DEFAULT)
1 = Disables DACB output. Current is set to 0 mA; output will go to 0 V.
100381B
Conexant
2-13
CONEXANT [ CONEXANT SYSTEMS, INC ]
