ak4560a AKM Semiconductor, Inc., ak4560a Datasheet - Page 22

• Manufacturer Part Number: ak4560a
• Description: 16bit Codec With Alc And Mic/hp/spk-amps
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
Timer Select
MS0028-E-00
Addr
04H
ZTM1-0: Zero crossing timeout at writing operation by uP and ALC1 recovery operation
FDTM1-0: FADEIN/OUT Cycle Setting
LTM1-0: ALC1 limiter operation period at zero crossing disable (ZELM = “1”)
WTM1-0: ALC1 Recovery Waiting Period
Timer Select
RESET
Register Name
R/W
Table 5. ALC1 Limiter Operation Period at zero crossing disable (ZELM = “1”)
The IPGA value is changed immediately. When the IPGA value is changed continuously, the
change is done by the period specified by LTM1-0 bits.
A period of recovery operation when any limiter operation does not occur during ALC1
operation.
Recovery operation is done at period set by WTM1-0 bits.
When the input signal level exceeds auto recovery waiting counter reset level set by LMTH bit,
the auto recovery waiting counter is reset.
The waiting timer starts when the input signal level becomes below the auto recovery waiting
counter reset level.
When IPGA of each L/R channels do zero crossing or timeout independently, the IPGA value is
changed by uP 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 IPGA of each L/R channel do zero crossing or timeout independently,
the IPGA value is changed.
FDTM1
WTM1
ZTM1
LTM1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Table 6. ALC1 Recovery Operation Waiting Period
FDTM1 FDTM0
D7
1
FDTM0
WTM0
ZTM0
LTM0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Table 7. Zero Crossing Timeout
Table 8. FADEIN/OUT Period
D6
0
1025/fs
2049/fs
4097/fs
1024/fs
2048/fs
4096/fs
1024/fs
2048/fs
4096/fs
513/fs
512/fs
512/fs
0.5/fs
ALC1 Recovery Operation Waiting Period
1/fs
2/fs
4/fs
- 22 -
ZTM1
ALC1 Limiter Operation Period
D5
Zero Crossing Timeout Period
1
10.7ms
21.4ms
42.7ms
85.4ms
48kHz
10.7ms
21.3ms
42.6ms
85.2ms
10.7ms
21.3ms
42.6ms
85.2ms
48kHz
48kHz
48kHz
FADEIN/OUT Period
10us
21us
42us
83us
ZTM0
D4
0
44.1kHz
44.1kHz
44.1kHz
44.1kHz
R/W
11.6ms
23.2ms
46.5ms
92.9ms
11.6ms
23.2ms
46.4ms
92.8ms
11.6ms
23.2ms
46.4ms
92.8ms
11us
23us
45us
91us
WTM1
D3
1
128.0ms
128.0ms
128.0ms
16.0ms
32.0ms
64.0ms
32kHz
16.0ms
32.0ms
64.0ms
16.0ms
32.0ms
64.0ms
32kHz
32kHz
32kHz
WTM0
125us
16us
31us
63us
D2
0
RESET
RESET
RESET
RESET
LTM1
D1
0
[AK4560A]
LTM0
2000/05
D0
0