AK4637EN Datasheet, PDF (63/96 Pages) Asahi Kasei Microsystems – 24bit Mono CODEC with MIC/SPK-AMP

[AK4637]
[Monaural Line Output Control Sequence (in case of using a Pop Noise Reduction Circuit)]
(1)
LOSEL bit
(2)
PMSL bit
(3)
SLPSN bit
(6)
(5)
(4)
AOUT pins
Normal Output
99%
Common Voltage
1%
Common Voltage
300 ms
300 ms
Figure 53. Monaural Line Output Control Sequence (in case of using a Pop Noise Reduction Circuit)
(1) Set LOSEL bit = “1”. Enable monaural line output.
(2) Set PMSL bit = “1”. Monaural line output exits power-down mode.
AOUT pin rises up to common voltage. Rise time to 99% common voltage is 200ms (max.
300ms) when C=1F.
(3) Set SLPSN bit = “1” after AOUT pin rises up. Monaural line output exits power-save mode.
Monaural line output is enabled.
(4) Set SLPSN bit = “0”. Monaural line output enters power-save mode.
(5) Set PMSL bit = “0”. Monaural line output enters power-down mode.
AOUT pin falls down to 1% of the common voltage. Fall time is 200ms (max. 300ms) when
C=1F.
(6) Set LOSEL bit = “0” after wait time (≥300ms). Disable monaural line output.
015010680-E-00
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2015/09