AK4564 Datasheet, PDF (28/48 Pages) Asahi Kasei Microsystems – 16BIT CODEC WITH BUILT-IN ALC AND MIC/HP/SPK-AMP

ASAHI KASEI
[AK4564]
The following registers should not be changed during the ALC1 operation.
WTM1-0, ZTM1-0, LMTH1-0, LMAT1-0, RGAIN1-0, REF7-0, FR
Manual Mode
WR (Power Management Control & Signal Select registers)
WR (ZTM1-0, WTM1-0)
WR (LMAT1-0, RGAIN1-0, LMTH1-0)
WR (REF7-0)
WR (IVOL7-0)
*1: The value of IVOL should be
the same or smaller than REF’s
WR (ALC1= “1”)
ALC1 Operation
No
Finish ALC1 mode?
Yes
WR (ALC1= “0”)
*2
Finish ALC1 mode and return to manual mode
Figure 22. Registers set-up sequence at ALC1 operation
*2: When ALC1 bit changes into “0”, it takes a period set by ZTM1-0 bit to return manual mode.
MS0140-E-01
- 28 -
2002/07