AK4632VN AKM [Asahi Kasei Microsystems], AK4632VN Datasheet - Page 50

• Manufacturer Part Number: AK4632VN
• Description: 16-Bit ?? Mono CODEC with ALC & MIC/SPK/Video-AMP
• Manufacturer: AKM [Asahi Kasei Microsystems]

ASAHI KASEI
MS0396-E-00
Addr
06H
DVTM : Digital Volume Soft Transition Time Control
LTM1-0: ALC1 limiter operation period at zero crossing disable (ZELM bit = “1”) (See Table 35)
WTM1-0: ALC1 Recovery Waiting Period (See Table 36)
ZTM1-0: ALC1 Zero crossing timeout Period (See Table 37)
ROTM: Period time for ALC2 Recovery operation, ALC2 Zero Crossing Timeout and ALC2 initializing cycle.
Register Name
Timer Select
A period of recovery operation when any limiter operation does not occur during the ALC1 operation.
Default is “00” (128/fs).
When the IPGA perform zero crossing or timeout, the IPGA value is changed by the µP WRITE operation,
ALC1 recovery operation or ALC1 limiter operation (ZELM bit = “0”). Default is “00” (128/fs).
The ROTM bit is set during the PMSPK bit = “0”.
The IPGA value is changed immediately. When the IPGA value is changed continuously, the change is done
by the period specified by the LTM1-0 bits. Default is “00” (0.5/fs).
0: 512/fs (Default)
1: 1024/fs
0: 1061/fs (Default)
1: 256/fs
This is the time to FFH from 00H of DVOL7-0 bits.
Default
Table 35. ALC1 Limiter Operation Period at zero crossing disable (ZELM bit=“1”)
LTM1 bit
ZTM1 bit
WTM1 bit
0
0
1
1
0
0
1
1
0
0
1
1
Table 36. ALC1 Recovery Operation Waiting Period
LTM0 bit
ZTM0 bit
DVTM
WTM0 bit
D7
Table 37. Zero Crossing Timeout Period
0
0
1
0
1
0
1
0
1
0
1
0
1
ROTM
D6
1024/fs
128/fs
256/fs
512/fs
0
0.5/fs
1/fs
2/fs
4/fs
ALC1 Recovery Operation Waiting Period
1024/fs
128/fs
256/fs
512/fs
- 50 -
ZTM1
D5
0
ALC1 Limiter Operation Period
Zero Crossing Timeout Period
128ms
125µs
250µs
500µs
8kHz
16ms
32ms
64ms
8kHz
63µs
128ms
8kHz
16ms
32ms
64ms
ZTM0
D4
0
WTM1
D3
0
16kHz
125µs
250µs
16kHz
31µs
63µs
16ms
32ms
64ms
8ms
16kHz
16ms
32ms
64ms
8ms
WTM0
D2
0
Default
Default
Default
LTM1
D1
0
[AK4632]
2005/06
LTM0
D0
0