AK8826 Datasheet, PDF (30/157 Pages) Asahi Kasei Microsystems – HD/SD Multi Format Video Encoder with 3ch DAC

■ Data Input Format
[AK8826VN]
AK8826 supports 4 kinds of Data Input Format such as 8-bit YCbCr / 16-bit YCbCr / 18bit RGB / 16-bit RGB formats.
Data Input Format can be defined by INPFMT[1:0]-bit and DTFMT-bit of I/O Data Format Register (R/W).
I/O Data Format Register
Sub Address 0x0B
bit 7
bit 6
HDSDMASE YC2RGB
bit 5
Reserved
bit 4
DTFMT
bit 3
bit 2
CONVMOD1 CONVMOD0
default Value 0x00
bit 1
bit 0
INPFMT1
INPFMT0
INPFMT[1:0] -bits defines bit width. Detailed setting is shown in following table
INPFMT[1:0]-bit
Input Data Format (width)
00
8-bit Data input
01
16-bit Data Input
10
18-bit Data Input
11
Reserve
Note
DTFMT -bit defines Data format.
DTFMT -bit
Input Data Format
0
YCbCr Data format
RGB Data Format
1
In case of CONVMOD[1:0]=[00] or [01], internal RGB to YCbCr convertor
works*
* In case of RGB Input mode, AK8826 doesn’t support Rec.656 I/F mode.
* 525i/625i/525P/625P composite, component encode only.
CONVMOD[1:0] -bits define encoder mode show as following table.
CONVMOD[1:0] -bit
mode
00
Composite Video Encoder mode
01
Component Video Encoder mode
10
High Speed DAC mode
11
Prohibited to set
INPFMT[1:0] -bit DTFMT-bit
CONVMOD[1:0] -bit
DATA
DATA
Formatter
MUX
YCbCr
RGB
to
YCbCr
Y
Cb/Cr ^Decimation Cb/Cr
Filter
MUX
RGB
Composite
Video Encoder
Composite
Video Encoder
Video DAC
Mode
Fig. 23 Data Interface block outline
MS0972-E-01
30
2008/12