AK4641 Datasheet, PDF (26/51 Pages) Asahi Kasei Microsystems – 16 BIT CODEC WITH BLUETOOTH INTERFACE

ASAHI KASEI
[AK4641]
[Setting timing of IPGA and ALC1 bits]
ZTM1-0 bits _XXH
t > zero cross time out period
00H
XXH
IPGA6-0 bits _AH
BH
IPGA
AH
BH
ALC1 bit
(1) (2)
(3) (4) (5)
Figure 24. Setting timing of IPGA and ALC1 bits
(1) Set the zero cross time out period of IPGA as 128/fs: ZTM1-0 bits = “00”. (Note)
(2) Set the IPGA value of ALC1 operation start by IPGA6-0 bits.
(3) The value of IPGA6-0 bits is reflected to actual gain at zero crossing or zero cross time out.
(4) Set the zero cross time out period of ALC1 operation by ZTM1-0 bits after the zero cross time out period set by (1).
(5) Set ALC1 bit to “1”.
(Note) If ZTM1-0 bits are set to the value except for “00”, ALC1 bit must be set to “1” after this zero cross time out
period.
MS0301-E-00
- 26 -
2004/05