AK8825 Datasheet, PDF (107/162 Pages) Asahi Kasei Microsystems – HD/SD Multi Format Video Encoder with 3ch DAC

■ Closed Caption
The description about “Closed Caption” is written in [6. Common Function Specification].
Closed Caption function is valid at 525i mode.
[AK8825]
■ WSS
The description about “WSS” is written in [6. Common Function Specification].
WSS function is valid at 625i /625p mode.
■ RGB Output
The AK8825 can output Analog RGB signal with digital RGB Data in.
YC2RGB-bit of I/O Data Format Register [SubAddress 0x0B] is a control bit for RGB output function.
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
YC2RGB-bit
0
1
Output signal
YUV Output
RGB Output
Note
■ DAC operating clock
The AK8825 has x2 PLL, DAC works with this x2 clock in Component Video Encoder mode. Following table shows DAC
operation clock of each mode.
Input Data
DAC Operation Clock
525i/625i
54MHz
525p/625p
54MHz
1080i
148.5MHz
720p
148.5MHz
Rev-E-00
107
2008/03