AK8855 Datasheet, PDF (66/81 Pages) Asahi Kasei Microsystems – NTSC/PAL Digital Video Decoder

[ASAHI KASEI]
Output Control 1 Register (R/W) [Sub Address 0x01]
Register to set the output data format.
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
AK8855
Default Value : 0x00
bit 1
bit 0
OFORM1 OFORM0
0
0
Output Control 1 Register Definition
BIT
Register
Name
R/
W
Definition
to set output picture sizes.
000: QVGA
001: VGA ( interlaced output )
bit 0
~
bit 2
OFORM1
~
OFORM2
Output Format Set bit
R/
W
010: CIF
011: QCIF
100: rotated QVGA ( 240 X 180 )
101: rotated CIF ( 288 X 216 )
110: 601 output
111: Reserved
to set Min. / Max. of output data.
0 : 1 - 254 (Y / Cb / Cr)
bit 3
LIMIT601 601 Output Limit
R/ 1 : 16 - 235 (Y) / 16 - 240 ( Cb / Cr )
W when “1” is set at LIMIT601 register, data
smaller than 16 is clipped to 16 and data larger
than 235 / 240 ( Y / Cb, Cr ) is clipped to 240.
to set output interface mode.
00: Camera Interface mode
bit 4
~
bit 5
OIF0
~
OIF1
Output interface set bit
( without SAV / EAV )
R/ 01: Camera Interface mode ( with SAV / EAV )
W 10: HD / VD mode
11: 656 Interface mode
In setting modes of 01 / 11, HD / VD output is
fixed to low.
to switch shift line of V-bit of EAV / ASAV which
is included in TRS.
This register is valid when OFORM [ 2:0 ] = 110.
NTSC system ( at 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
bit 6
TRSVSEL
Time Reference Signal
V Select bit
R/
W
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 ( at 625 Line input )
Regardless of set value of 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,
bit 7
VDPSUP VD Pulse SUPress
R/ 0 : VD / VAF pulse is not output at the Frames
W which are not active.
1 : VD / VAF pulse is output even at the Frames
which are not active.
MS0319-E-03
66
2004 / 11