AK8853XQ Datasheet, PDF (19/70 Pages) Asahi Kasei Microsystems – NTSC/PAL/SECAM Digital Video Decoder

[AK8853XQ/ VN]
The register settings for auto detection are essentially as follows.
AUTODET-bit: Settings for auto detection of input signal (auto detection mode)
AUTODET-bit
Auto detection
Notes
[0]
OFF
Manual setting
[1]
ON
–
The auto detection recognizes the following parameters.
Number of lines per frame: 525/625
Carrier frequencies: 3.57954545
3.57561149
3.58205625
4.43361875
Color encoding formats: NTSC
PAL
SECAM
Monochrome signal: Not monochrome/monochrome
Note: Automatic monochrome detection is active if the color kill setting is ON (COLKILL-bit = [1].)
The AK8853 stores the detected parameter to the Input Video Status Register (thus, as an internal
notice function).
This enables the host to distinguish among the formats NTSC-M, J; NTSC-4.43; PAL-B, D, G, H, I, N;
PAL-M; PAL-Nc; PAL-60; SECAM; and monochrome.
It should be noted that it does not detect NTSC-M, NTSC-J, or PAL-B, D, G, H, I, N formats.
In auto detection, the candidates for detection can be limited as shown below.
NDMODE Register: For limiting auto detection candidates
Bit
Register
Name
R/W
bit 0 NDPALM
No Detect PAL-M bit
R/W
Definition
[0]: PAL-M candidate
[1]: PAL-M non-candidate
bit 1 NDPALNC No Detect PAL-Nc bit
R/W
[0]: PAL-Nc candidate
[1]: PAL-Nc non-candidate
bit 2 NDSECAM No Detect SECAM bit
R/W
[0]: SECAM candidate
[1]: SECAM non-candidate
bit 3 Reserved
Reserved
R/W Reserved
bit 4 NDNTSC443 No Detect NTSC-4.43 bit
R/W
[0]: NTSC-4.43 candidate
[1]: NTSC-4.43 non-candidate
bit 5 NDPAL60 No Detect PAL-60 bit
R/W
[0]: PAL-60 candidate
[1]: PAL-60 non-candidate
bit 6 ND525L
No Detect 525Line bit
R/W
[0]: 525 line candidate
[1]: 525 line non-candidate
bit 7 ND625L
No Detect 625Line bit
R/W
[0]: 625 line candidate
[1]: 625 line non-candidate
Rev-E-00
19
2008/01