AK4650 Datasheet, PDF (28/86 Pages) Asahi Kasei Microsystems – 16Bit ΔΣ CODEC with MIC/HP/SPK-AMP & TSC

[AK4650]
■ Manual Mode
The AK4650 becomes a manual mode at ALC1 bit = “0”. The mode is used in the case shown below.
(1) After exiting reset state, set up the registers for the ALC1 operation (ZTM1-0, LMTH and etc)
(2) When the registers for the ALC1 operation (Limiter period, Recovery period and etc) are changed.
For example; When the change of the sampling frequency.
(3) When IPGA is used as a manual volume.
When writing to the IPGA5-0 bits continually, the control register should be written by an interval more than zero
crossing timeout.
MICMT
0
1
IPGA5-0
GAIN (dB)
STEP
3FH
+27.5
3EH
+27.0
:
:
0.5dB
09H
+0.5
08H
+0.0
07H
−1.0
06H
−2.0
:
:
1.0dB
01H
−7.0
00H
−8.0
x
MUTE
Table 14. IPGA Volume (x: Don’t care)
(default)
MS0502-E-01
- 28 -
2007/04