AK4560A Datasheet, PDF (40/47 Pages) Asahi Kasei Microsystems – 16bit CODEC with ALC and MIC/HP/SPK-Amps

ASAHI KASEI
(3) Zero crossing timeout (ZTM1-0)
Limiter detection level (LMTH)
(1)
[AK4560A]
ATT level (LMAT1-0)
(2)
(2)
Recovery waiting counter reset level (LMTH)
(1)
Limiter detection level (LMTH)
(3) Zero crossing timeout (ZTM1-0)
ATT level (LMAT1-0)
Figure 31. In case of continuing the limiter operation (ZELM = “0”)
(1) When the input level exceeds the ALC1 limiter detection level, the ALC1 limiter operation starts. Zero crossing
counter starts at the same time.
(2) Zero crossing detection. When the input signal is detected, the IPGA value is attenuated until the value set by
LMAT1-0 and the ALC1 limiter operation is finished.
(3) Zero crossing timeout is set by ZTM1-0 bits. But the first zero crossing timeout cycle after starting the limiter
operation may be the short cycle by the state of the last zero crossing counter. (For example, in case of doing the
limiter operation during the recovery operation)
MS0028-E-00
- 40 -
2000/05