AK4951AEN Datasheet, PDF (98/105 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/HP/SPK-AMP

[AK4951A]
2. Power up DAC → Headphone Amplifier
PMBP bit
(Addr:00H, D5)
BEEPH bit
(Addr:12H, D4)
(1)
(2)
PTS1-0
bits
(4)
(3)
PTS1-0
bits
Example: default
(1) Addr:00H, D5 bit = “1”
(2) Addr:12H, D4 bit = “1”
BEEP Signal Output
HPL pin
HPR pin
Normal Output
Normal Output
+ Beep Output
Normal Output
(3) Addr:12H, D4 bit = “0”
(4) Addr:00H, D5 bit = “0”
Figure 67. “BEEP-Amp → Headphone-Amp” Output Sequence
<Example>
At first, clocks should be supplied according to “Clock Set Up” sequence, and Headphone Amplifier
output should be started according to “Headphone Amplifier Output” sequence.
(1) Power up BEEP Amplifier: PMBP bit = “0” → “1”
(2) BEEP output: BEEPH bit= “0” → “1”
After the transition time set by PTS1-0 bits, BEEP output starts.
(3) BEEP stop: BEEPH bit= “1” → “0”
(4) Power down BEEP Amplifier: PMBP bit = “1” → “0”
016001936-E-00
- 98 -
2016/03