AK8825 Datasheet, PDF (5/162 Pages) Asahi Kasei Microsystems – HD/SD Multi Format Video Encoder with 3ch DAC

1-2. NTSC/PAL Composite Video Encoder Block
From
Timing
Generator
Y[7:0
Cb[7:0]
Cr[7:0]
From
Clock Gen
SD-Timing
Generator
13.5MHz
x2
LPF-A
Interpolation
4:2:2 to 4:4:4
27MHz
6.75MHz
CGMS-A
WSS
SYNC
Generator
U
LPF-B _V
cos
sin
13.5MHz
DFS
C
x2
LPF-C
sin(x)/x
sin(x)/x
sin(x)/x
27MHz
[AK8825]
Y[9:0]
to DAC
CVBS[9:0]
to DAC
C[9:0]
to DAC
Fig. 3 Composite Video Encoder Block
This Block described as Composite Video Encoder Block in this datasheet.
1-3 High Speed Video DAC mode
AK8825 can be used as High Speed Video DAC. This mode is described as Video DAC mode in this datasheet.
From
CLKIN
DATA[5:0] / DATA[4:0]
DAC1
DATA[17:0]
Data
DATA[11:6] / DATA[10:5]
Distributor
Level
Shifter
Delay
(unit CLK)
DAC2
DATA[17:12] / DATA[15:11]
DAC3
HDI
Delay
HDO
VDI
Delay
VDO
Fig. 4 High Speed Video ADC Block
Rev-E-00
5
2008/03