ak8825 AKM Semiconductor, Inc., ak8825 Datasheet - Page 123
ak8825
Manufacturer Part Number
ak8825
Description
Hd/sd Multi Format Video Encoder With 3ch Dac
Manufacturer
AKM Semiconductor, Inc.
Datasheet
1.AK8825.pdf
(162 pages)
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9. High Speed Video DAC mode
■ Block Diagram
■ Input Data Format
■ Full-Scale Code and Level Conversion
Input data is expanded to 10-bit, then it is converted to analog signal with DAC.
Full-Scale code is shown as following table.
The DAC output Level at Full-Scale Code can be set with OLVL-bit of DAC Control Register [SubAddress 0x0D] .
DAC Control Register
Sub Address 0x0D
Rev-E-00
Input Data
RGB565
RGB666
Reserved
bit 7
Full-Scale Code
OLVL-ibit
0
1
Analog RGB
Analog RGB
Reserved
Output
bit 6
Output Level [V]
OLVL
Data
bit 5
1.28V (typ)
HDI
VDI
0.7V (typ)
R=0x3E0
G=0x3F0
B=0x3E0
RGB565
Fig. 171 High Speed Video DAC mode
Digital RGB Data is converted to Analog RGB signal by DAC
Digital RGB Data is converted to Analog RGB signal by DAC
DTRSTN
bit 4
Converter
123
(+/-3clk)
Level
Delay
G=0x3F0
R=0x3F0
B=0x3F0
RGB666
CVBSSEL
bit 3
Operation
DAC3EN
bit 2
HDO
VDO
DAC
DAC2EN
bit 1
default Value 0x00
DAC1EN
bit 0
2008/03
[AK8825]
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