AK8856 Datasheet, PDF (43/105 Pages) Asahi Kasei Microsystems – NTSC/PAL Digital Video Decoder

ASAHI KASEI
[ AK8856 ]
Decode Data Output (Rec. 601 Limit)
The AK8856 outputs decoded data at a level (Y / Cb / Cb 4:2:2) specified by ITU-R BT.601. Minimum and
maximum output data can be selected by the [LIMIT601] bit of the 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
Maximum and minimum output data is specified by the [LIMIT601]-bit. All internal arithmetic operations are
processed at Min. = 1, Max. = 254. Clipping value of the output code differs by the setting of the [LIMIT601] –bit.
The default setting value 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 )
Rev-01
43
2007/03