AK8856VN Datasheet, PDF (82/98 Pages) Asahi Kasei Microsystems – NTSC/PAL Video Decoder

ASAHI KASEI
[AK8856 Preliminary Data Sheet]
Output Control 1 Register (R/W) [Sub Address 0x01]
Sub Address 0x01
bit 7
bit 6
bit 5
bit 4
bit 3
VDPSUP TRSVSEL
OIF1
OIF0
LIMIT601
Default Value
0
0
0
0
0
bit 2
OFORM2
0
Default Value : 0x00
bit 1
bit 0
OFORM1
OFORM0
0
0
Output Control 1 Register Definition
BIT Register Name
bit 0
OFORM0
~
~
Output Format Set bit
bit 2
OFORM2
bit 3
LIMIT601
601 Output Limit
bit 4
OIF0
~
~
Output interface set bit
bit 5
OIF1
Time Reference Signal V
bit 6
TRSVSEL
Select bit
bit 7
VDPSUP
VD Pulse SUPress
R/W
R/W
R/W
R/W
R/W
R/W
Definition
Set output picture size:
OFORM[2:0]
000: QVGA
001: VGA ( interlaced output )
010: CIF
011: QCIF
100: rotated QVGA ( 240 X 180 )
101: rotated CIF ( 288 X 216 )
110: 601 output
111: Reserved
Sets Minimum / Maximum limit for output data:
0 : 1-254 (Y/Cb/Cr)
1 : 16-235 (Y) / 16-240 (Cb/Cr)
when “1” is set in the LIMIT601 register, data smaller
than 16 is clipped to 16 and data larger than 235 / 240
( Y / Cb, Cr ) is clipped to 240.
Sets output interface mode:
00: Camera Interface mode (without SAV / EAV)
01: Camera Interface mode (with SAV / EAV)
10: HD / VD mode
11: 656 Interface mode
In modes 01 / 11, HD / VD output is fixed low.
Switches shift line of V-bit of EAV / ASAV which is
included in TRS:
This register is valid when OFORM [ 2:0 ] = 110.
NTSC system (525 line input)
TRSVSEL=0 :
V = 1 when Line 1 ~ Line 9 / Line 264 ~ Line 272
V = 0 when Line 10 ~ Line 263 / Line 272 ~ Line 525
TRSVSEL=1:
V = 1 when Line 1 ~ Line 19 / Line 264 ~ Line 282
V = 0 when Line 20 ~ Line 263 / Line 283 ~ Line 525
PAL system (625 line input)
Regardless of the set value of the TRSVSEL bit,
V = 1 when Line 1 ~ Line 22 / Line 311 ~ Line
355 / Line 624 ~ Line 625
V = 0 when Line 23 ~ Line 310 / Line 336 ~ Line 623
When Frame Rate Variable Function is activated
in HD / VD mode and 656 I / F mode,
0 : VD / VAF pulse is not output at the frames
that are not active.
1 : VD / VAF pulse is output even at the Frames
which are not active.
MS0522-E-00
82
2006/Dec