ak4564 AKM Semiconductor, Inc., ak4564 Datasheet - Page 39

• Manufacturer Part Number: ak4564
• Description: 16bit Codec With Built-in Alc And Mic/hp/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
Timer Select
MS0140-E-01
Addr
06H
WTM1-0: ALC1 Recovery Waiting Period
ZTM1-0: IVOL Zero crossing Timeout Period
FDTM1-0: FADEIN/OUT Cycle Setting
TM1-0: Select zero crossing timeout period of OATT
* WTM1-0, ZTM1-0, FDTM1-0 and TM1-0 have the same time between fs=32kHz (FSTM bit = “1”)
and fs=48kHz (FSTM bit = “0”).
Timer Select
Default
Register Name
A period of recovery operation when any limiter operation does not occur during ALC1 operation.
When IVOL of each L/R channels do zero crossing or timeout independently, the IVOL value is changed
by P WRITE operation or ALC1 recovery operation.
The FADEIN/OUT operation is done by a period set by FDTM1-0 bits when FDIN or FDOUT bits are set
to “1”. When IVOL of each L/R channel do zero crossing or timeout independently, the IVOL value is
changed.
These bits are enabled at ZCE = “1”.
Table 14. ALC1 Recovery Operation Waiting Period
FDTM1
Table 17. Select zero crossing timeout of OATT
TM1
TM1
WTM1
ZTM1
0
0
1
1
D7
0
0
1
1
Table 15. Zero Crossing Timeout Period
0
0
0
1
1
0
0
1
1
Table 16. FADEIN/OUT Period
TM0
TM0
FDTM0
D6
0
1
0
1
1
WTM0
ZTM0
0
1
0
1
0
1
0
1
0
1
0
1
Zero Crossing Timeout Period
- 39 -
FDTM1
D5
0
Zero Crossing Timeout Period
ALC1 Recovery Period
FADEIN/OUT Period
FDTM0
16ms
32ms
64ms
8ms
D4
1
20ms
40ms
48ms
56ms
24ms
48ms
96ms
6ms
24ms
48ms
96ms
6ms
ZTM1
D3
1
Default
Default
Default
ZTM0
D2
0
Default
WTM1
D1
1
[AK4564]
WTM0
2002/07
D0
0