AK4631 Datasheet, PDF (50/69 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK-AMP

ASAHI KASEI
[AK4631]
Addr
06H
Register Name
Timer Select
Default
D7
DVTM
0
D6
ROTM
0
D5
ZTM1
0
D4
ZTM0
0
D3
WTM1
0
D2
WTM0
0
D1
LTM1
0
D0
LTM0
0
LTM1-0: ALC1Ϧϛολಈ࡞มߋपظͷઃఆ(see Table 32)
ALC1Ϧϛολಈ࡞θϩΫϩεݕग़͕Disable (ZELM bit=“1”)ͷ࣌ɺALC1Ϧϛολಈ࡞ʹΑΓIPGA
஋͸ॠ࣌ʹมߋ͞Ε·͢ɻIPGA஋͕࿈ଓͯ͠มߋ͞ΕΔ৔߹͸ɺLTM1-0 bitͰઃఆ͞ΕΔपͰظ
มߋ͕ߦΘΕ·͢ɻॳظ஋͸“00”Ͱ͢ɻ
LTM1 LTM0
ALC1Ϧϛολมߋपظ
8kHz
16kHz
0
0
0.5/fs
63µs
31µs
Default
0
1
1/fs
125µs
63µs
1
0
2/fs
250µs
125µs
1
1
4/fs
500µs
250µs
Table 32. ALC1 Limiter Operation Period at zero crossing disable (ZELM bit=“1”)
WTM1-0: ALC1ϦΧόϦ଴ؒ࣌ػͷઃఆ(see Table 33)
ALC1ಈ࡞தʹϦϛολಈ࡞͕ൃੜ͠ͳ͍৔߹ɺϦΧόϦಈ࡞Λߦ͏पظΛઃఆ͠·͢ɻॳظ஋͸
“00”Ͱ͢ɻ
WTM1 WTM0
ALC1ϦΧόϦपظ
8kHz
16kHz
0
0
128/fs
16ms
8ms
0
1
256/fs
32ms
16ms
1
0
512/fs
64ms
32ms
1
1
1024/fs
128ms
64ms
Table 33. ALC1 Recovery Operation Waiting Period
Default
ZTM1-0: ALC1θϩΫϩελΠϜΞ΢τ࣌ؒͷઃఆ(see Table 34)
ϚΠίϯॻ͖ࠐΈಈ࡞ɺALC1ϦΧόϦಈ࡞ʹΑΓɺήΠϯ͕มߋ͞ΕΔͷ͸ɺθϩΫϩε͢Δ͔
·ͨ͸λΠϜΞ΢τͨ͠৔߹Ͱ͢ɻॳظ஋͸“00”Ͱ͢ɻ
ZTM1 ZTM0
θϩΫϩελΠϜΞ΢τ࣌ؒ
8kHz
16kHz
0
0
128/fs
16ms
0
1
256/fs
32ms
1
0
512/fs
64ms
1
1
1024/fs
128ms
8ms
16ms
32ms
64ms
Default
Table 34. Zero Crossing Timeout Period


ROTM: ALC2 ϦΧόϦಈ࡞पظɺθϩΫϩελΠϜΞ΢τ࣌ؒͼٴɺॳظԽαΠΫϧͷઃఆɻ
0: 512/fs (Default)
1: 1024/fs
ROTM bitͷઃఆ͸ɺPMSKP bit = “0”ͷؒʹߦͬͯԼ͍͞ɻ
DVTM : Digital Volume ͷιϑτભҠ࣌ؒΛઃఆ͠·͢ɻ
0: 1061/fs (Default)
1: 256/fs
͜ͷιϑτભҠ࣌ؒ͸ DVOL7-0 bits Λ 00H ͔Β FFH ΁มߋͨ͠৔߹ͷભҠ࣌ؒͰ͢ɻ
MS0317-J-01
- 50 -
2004/11