AK8850 Datasheet, PDF (74/99 Pages) Asahi Kasei Microsystems – NTSC Digital Video Decoder

ASAHI KASEI
[AK8850]
OUTPUT FORMAT REGISTER ( W / R ) [ SUB ADDRESS 0x06 ]
Register to set output format.
Sub Address 0x06
bit 7
bit 6
ACTSTA2 ACTSTA1
0
0
bit 5
ACTSTA0
0
bit 4
bit 3
YCDELAY2 YCDELAY1
Default Value
0
0
bit 2
YCDELAY0
0
Default Value : 0x00
bit 1
bit 0
601LIMIT ERRHND
0
0
Output Format Register Definition
BIT Register Name
bit 0 ERRHND Error Handling bit
bit 1 601LIMIT 601 Output Limit bit
bit 2
~
Y/C Delay Control bit
bit 4 _YCDELAY0
-
YCDELAY2
Active Video Start Control bit
bit 5 ACTSTA0
~
-
bit 7 ACTSTA2
R/W Definition
R/W Setting the data handling procedure when
AK8850 cannot output the data follow to ITU-R.
Bt.656. Error handling normally occurs within the
last lines of the Frame.
0 : Line Drop/Repeat
1 : Number of Smaples of the line is change.
Min/Max value of the output data
R/W 0 : 1~254 (Y/Cb/Cr) [Default ]
1 : 16~235 (Y) 16~240 (Cb/Cr)
Y/C delay setting for output data.
R/W One delay time is 74nsec(1clock@13.5MHz)
Set the value with 2’s complement
[YCDELAY2-YCDELAY0]=
101 : Y-data is 3clocks delay against C-data
110 : Y-data is 2clocks delay against C-data
111 : Y-data is 1clock delay against C-data
000 : No delay [Default]
001 : C-data is 1clock delay against Y-data
010 : C-data is 2clocks delay against Y-data
011 : C-data is 3clocks delay against Y-data
Set fine adjustment of Start position of decoded
R/W video data.
Set the value with 2’s complement
[ACTSTA2:ACTSTA0]=
101 : Decoding the video data 3pixels earlier.
110 : Decoding the video data 2pixels earlier.
111 : Decoding the video data 1pixel earlier.
000 : Normal position [Default]
001 : Decoding the video data 1pixel delayed.
010 : Decoding the video data 2pixels delayed.
011 : Decoding the video data 3pixels delayed.
Rev.0
74
2003/01