AK8855 Datasheet, PDF (29/81 Pages) Asahi Kasei Microsystems – NTSC/PAL Digital Video Decoder

[ASAHI KASEI]
AK8855
Decode Data Output ( Rec. 601 Limit )
The AK8855 outputs the decode data at the specified level ( Y / Cb / Cb 4:2:2 ) by ITU-R BT.601.
Min. / Max. output data can be selected by [ LIMIT601 ]-bit of Output Control 1 Register ( R/W ) [ Sub
Address 0x01 ].
Bit allocation of Output Control 1 Register is as follows.
Sub Address 0x01
bit 7
bit 6
VDPSUP TRSVSEL
0
0
bit 5
OIF1
0
bit 4
bit 3
OIF0
LIMIT601
Default Value
0
0
bit 2
OFORM2
0
Default Value : 0x00
bit 1
bit 0
OFORM1 OFORM0
0
0
[ LIMIT601 ]-bit
Min. / Max. of Output Data is specified by [ LIMIT601 ]-bit.
All internal, arithmetic operations are processed at Min. = 1, Max. = 254.
Clipping value of Output code differs by [ LIMIT601 ] –bit setting.
Default value setting is “0”.
[LIMIT601]-bit
0
1
Output code Min.Max
Y : 1 ~ 254
Cb/Cr : 1 ~ 254
Y : 16 ~ 235
Cb/Cr : 16 ~ 240
Condition
( Default value )
MS0319-E-03
29
2004 / 11