AK4950 Datasheet, PDF (101/106 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/SPK/Cap-less VIDEO-AMP & mini DSP

[AK4950]
■ Video Input/Output
Clocks
VG1-0 bits
(Addr: 0CH, D19-18)
PMCP bit
(Addr: 0CH, D17)
PMV bit
(Addr: 0CH, D16)
VOUT pin
Clocks can be stopped, if only video output is enabled.
XX
0
0
VSS1
00
(1)
1
(2)
1
max 300ms (VIN Input Capacitor = 1.0uF)
0
(3)
0
Normal Output
VSS1
Figure 75. Video Output Sequence
Example:
Audio Function :No use
Video Gain = +6dB
(1) Addr:0CH, Data:00H
(2) Addr:0CH, Data:03H
Video Output
(3) Addr:0CH, Data:00H
<Example>
When only the video block is in operation, the clocks are not needed.
(1) Set up the video gain (VG1-0 bits).
(2) Power up Video Amp and Charge Pump: PMV, PMCP bits = “0” → “1”
It takes maximum 300ms to a stable operation of clamp circuit. (input capacitor at the VIN pin = 1.0uF)
(3) Power down Video Amp: PMV, PMCP bits = “0” → “1”
The VOUT pin output is stopped and becomes 0V.
MS1320-E-00
- 101 -
2011/10