AK4953A Datasheet, PDF (88/96 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/HP/SPK-AMP

[AK4953A]
■ Beep Signal Output from Headphone-Amp
1. Power down DAC → Headphone-Amp
BEEP Gen bits
(Addr:15-19H)
00H
(1)
00H
PMHPL bit
PMHPR bit
(Addr:01H, D5-4)
PMBP bit
(Addr:00H, D5)
BPOUT bit
(Addr:19H, D7)
(2)
(3)
(4)
(6)
(5)
(4)
Example:default
(1) Addr:15-19H, Data:00H
(2) Addr:01H, Data:30H
(3) Addr:00H, D5 bit = “1”
(4) Addr:19H, Data:80H
BEEP Signal Output
Addr:19H, Data:00H (Auto)
HPL pin
HPR pin
> 35ms
0V
Beep Output
(5) Addr:00H, D5 bit = “0”
0V
(6) Addr:01H, Data:00H
Figure 59. “BEEP Generator → Headphone-Amp” Output Sequence
<Example>
At first, clocks should be supplied according to “Clock Set Up” sequence.
(1) Set up BEEP Generator (Addr: 15H ~ 19H) (When repeat output time BPCNT bit = “0”)
(2) Power up Headphone-Amp: PMHPL bit or PMHPR bit = “0” → “1”
(3) Power up BEEP-Generator: PMBP bit = “0” → “1”
Charge pump circuit starts to power-up. The power-up time of Headphone-Amp block is 35ms (max).
(4) BEEP output: BPOUT bit= “0” → “1”
After outputting data particular set times, BPOUT bit automatically goes to “0”.
(5) Power down BEEP Generator: PMBP bit = “1” → “0”
(6) Power down Headphone-Amp: PMHPL bit or PMHPR bit = “1” → “0”
MS1252-E-00
- 88 -
2010/10