AK4632 Datasheet, PDF (66/70 Pages) Asahi Kasei Microsystems – 16-Bit ΔΣ Mono CODEC with ALC & MIC/SPK/Video-AMP

ASAHI KASEI
„ Video Signal Input and Output
[AK4632]
Clocks
Clocks can be stopped, if only video output is enable.
PMVCM bit
(Addr:00H, D6)
X
1
(1)
(2)
SAGC1-0 bits
(Addr:0CH, D6-5)
XX
XX
VGCA4-0 bits
(Addr:0CH, D4-0)
XXXXX
(3)
PMV bit
(Addr:01H, D7)
XXXXX
(4)
VOUT pin
AVSS
Normal Output
AVSS
Figure 55. Video Output Sequence
Example:
Audio Function :No use
PLL Master Mode
VIDEO Output : DC Output
VGCA : 0dB
(1) Addr:00H, Data:45H
(2) Addr:0CH, Data:02H
(3) Addr:01H, Data:8BH
Video Output
(4) Addr:01H, Data:0BH
<Example>
When the only video function is used, the clocks are not needed to input.
(1) Power Up of VCOM : PMVCM bit = “0” → “1”
(2) Set up the output circuit(SAGC1-0bits) and GCA(VGCA4-0 bits)
(3 ) Power Up of Video-Amp : PMV bit = “0” → “1”
The video signal that is input to VIN pin starts output from VOUT pin.
(4) Power Down of Video-Amp : PMV bit = “1” → “0”
The output from VOUT pin stops. VOUT pin goes to AVSS.
If any audio functions are not used, VCOM can be powered-down(PMVCM bit =“0”)
MS0396-E-00
- 66 -
2005/06