AK4645AEZ Datasheet, PDF (29/85 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP-AMP

[AK4645A]
LRCK
0123
BICK(32fs)
SDTO(o)
0 15 14
9 10 11 12 13 14 15 0 1 2 3
8 7 6 5 4 3 2 1 0 15 14
SDTI(i)
0 15 14
0123
BICK(64fs)
SDTO(o)
15 14
8 7 6 5 4 3 2 1 0 15 14
15 16 17 18
31 0 1 2 3
210
15 14
SDTI(i)
15 14
210
15:MSB, 0:LSB
Lch Data
Don't Care
15 14
Figure 24. Mode 3 Timing
9 10 11 12 13 14 15 0 1
876543210
876543210
15 16 17 18
31 0 1
210
2 1 0 Don't Care
Rch Data
■ ϞϊϥϧʗεςϨΦ੾Γସ͑
PMADL, PMADR, MIX bitsͷઃఆʹΑΓADCͷϞϊϥϧʗεςϨΦಈ࡞Λ੾Γସ͑Δ͜ͱ͕Ͱ͖·͢ɻMIX
bit = “1”ͷ৔߹ɺEQ=FIL3 bits = “0”ʹઃఆͯ͠Լ͍͞ɻԼදͷσʔλʹରͯ͠ALCಈ࡞(ALC bit = “1”)·ͨ͸
σΟδλϧϘϦϡʔϜಈ࡞(ALC bit = “0”)͕ߦΘΕ·͢ɻ
PMADL bit
0
0
1
1
PMADR bit MIX bit
ADC Lch data
ADC Rch data
0
x
All “0”
All “0”
1
x
Rch Input Signal
Rch Input Signal
0
x
Lch Input Signal
Lch Input Signal
1
0
Lch Input Signal
Rch Input Signal
1
(L+R)/2
(L+R)/2
Table 12. ϞϊϥϧʗεςϨΦ੾Γସ͑(x: Don’t care)
(default)
■ σΟδλϧHPF
AK4645A͸DCΦϑηοτΩϟϯηϧ༻ͷHPFΛ಺ଂ͍ͯ͠·͢ɻHPFͷΧοτΦϑप೾਺͸0.9Hz (@fs=
44.1kHz)ʹͳ͓ͬͯΓɺαϯϓϦϯάप೾਺(fs)ʹൺྫ͠·͢ɻPMADL bit = “1” or PMADR bit = “1”ͷͱ͖ɺ
ADCͷHPF͸ONɺDACͷHPF͸OFFͰ͢ɻPMADL=PMADR bits = “0”, PMDAC bit = “1”ͷͱ͖ɺDACͷHPF
͸ONɺADCͷHPF͸OFFͰ͢ɻ
MS0986-J-00
- 29 -
2008/07