ak8825 AKM Semiconductor, Inc., ak8825 Datasheet - Page 34

• Manufacturer Part Number: ak8825
• Description: Hd/sd Multi Format Video Encoder With 3ch Dac
• Manufacturer: AKM Semiconductor, Inc.

■ Data Input Format
I/O Data Format Register
Sub Address 0x0B
INPFMT[1:0] -bits defines bit width. Detailed setting is shown in following table
DTFMT -bit defines Data format.
* In case of RGB Input mode, AK8825 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.
Rev-E-00
HDSDMASE
AK8825 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).
CONVMOD[1:0] -bit
INPFMT[1:0]-bit
DATA
bit 7
DTFMT -bit
INPFMT[1:0] -bit
00
01
10
11
00
01
10
11
0
1
Formatter
YC2RGB
DATA
bit 6
8-bit Data input
16-bit Data Input
18-bit Data Input
Reserve
YCbCr Data format
RGB Data Format
In case of CONVMOD[1:0]=[00] or [01], internal RGB to YCbCr convertor
works*
Composite Video Encoder mode
Component Video Encoder mode
High Speed DAC mode
Prohibited to set
Input Data Format (width)
DTFMT-bit
MUX
Reserved
bit 5
Fig. 24 Data Interface block outline
YCbCr
RGB
to
YCbCr
mode
DTFMT
RGB
Input Data Format
bit 4
Cb/Cr
34
Y
High Speed DAC mode only
CONVMOD1
Decimation
bit 3
Filter
CONVMOD0
Cb/Cr
CONVMOD[1:0] -bit
Note
bit 2
MUX
INPFMT1
bit 1
default Value 0x00
Video Encoder
Video Encoder
Video DAC
Composite
Composite
Mode
INPFMT0
bit 0
2008/03
[AK8825]