AK8851 Datasheet, PDF (74/80 Pages) Asahi Kasei Microsystems – NTSC/PAL/SECAM Digital Video Decoder

ASAHI KASEI
Input Video Status Register (R) [Sub Address 0x19]
[AK8851]
This shows a result of automatic input signal distinguishing function.
Sub Address 0x19
bit 7
bit 6
Fixed
Undef
bit 5
ST_B/W
bit 4
ST_VLF
bit 3
ST_VCEN1
bit 2
ST_VCEN0
Default Value : 0x00
bit 1
bit 0
ST_VSCF1 ST_VSCF0
Input Video Status Register Definition
BIT Register Name
R/W Definition
R Sub-Carrier frequency of the input video signal
[ST_VSCF1:STVSCF0]-bit
bit 0 ST_VSCF0
00 : 3.57954545 MHz
~
~
Status of Video Sub Carrier Freq
01 : 3.57561188 MHz
bit 1 ST_VSCF1
10 : 3.5820558 MHz
11 : 4.43361875 MHz
Color Encode type of the input video signal
bit 2 ST_VCEN0
~
~
Status of Video Color Encode
bit 3 ST_VCEN1
[ VCEN1:VCEN0]-bit
R/W
00 : NTSC
01 : PAL
10 : SECAM
11 : Reserved
Number of Lines of the input video signal
bit 4
ST_VLF
Status of Video Line Frequency R/W 0 : 525
1 : 625
bit 5
ST_B/W
Status of B/W Signal
Black and White detection
R
0 : Color signal
1 : Black and White signal
bit 6
UNDEF
Undefined bit
Recognition status
R
0 : Under recognition (Recognition is done)
1 : Unable to recognize the input video signal
Recognition status
bit 7
FIXED
Input Video Standard fixed bit
R
0 : Under recognition
1 : Recognition is finished
MS0244-E-03
74
Confidential
2005 / 07