AK4343VN Datasheet, PDF (30/99 Pages) Asahi Kasei Microsystems – Stereo DAC with HP/RCV/SPK-AMP

[AK4343]
■ EXT Slave Mode (PMPLL bit = “0”, M/S bit = “0”)
PMPLL bitΛ“0”ʹ͢Δ͜ͱͰɺ֎෦ΫϩοΫϞʔυ(EXT Mode)Ͱಈ࡞͠ɺMCKI pin͔ΒPLLΛհͣ͞ʹ௚઀ɺ
DACʹϚελΫϩοΫΛೖྗͰ͖·͢ɻ͜ͷϞʔυ͸௨ৗͷΦʔσΟΦDACͱͷI/Fʹରͯ͠׵ޓੑ͕͋Γ
·͢ɻඞཁͳΫϩοΫ͸MCKI (256fs, 512fs or 1024fs), BICK (≥32fs), LRCK(fs)Ͱ͢ɻMCKIͱLRCK͸ಉ͢ظ
Δඞཁ͕͋Γ·͕͢Ґ૬Λ߹ΘͤΔඞཁ͸͋Γ·ͤΜɻMCKIͷೖྗप೾਺͸FS1-0 bitʹΑΓબ୒͢Δ͜ͱ
͕ՄೳͰ͢ɻ(Table 12)
Mode
0
1
2
3
FS3-2 bits
FS1 bit FS0 bit
MCKI Input
Frequency
Sampling Frequency
Range
Don’t care
0
0
256fs
7.35kHz ∼ 48kHz (default)
Don’t care
0
1
1024fs
7.35kHz ∼ 13kHz
Don’t care
1
0
256fs
7.35kHz ∼ 48kHz
Don’t care
1
1
512fs
7.35kHz ∼ 26kHz
Table 12. EXT Slave Mode (PMPLL bit = “0”, M/S bit = “0”) ࣌ͷMCKIप೾਺ͷઃఆ
௿଎αϯϓϦϯά࣌͸ଳҬ֎ϊΠζͷͨΊɺDACग़ྗͷS/N͕ྼԽ͠·͢ɻMCKIʹೖྗ͞ΕΔϚελΫϩο
Ϋͷप೾਺Λ্͛Δ͜ͱͰɺS/NΛվળͰ͖·͢ɻTable 13͸DACग़ྗ͔ΒLOUT/ROUT pinʹ௨ͨ͠৔߹ͷ
S/NͰ͢ɻ
MCKI
S/N
(fs=8kHz, 20kHzLPF + A-weighted)
256fs
83dB
512fs
93dB
1024fs
93dB
Table 13. Relationship between MCKI and S/N of LOUT/ROUT pins
DAC͕ಈ࡞த(PMDAC bit = “1”)͸֎෦ΫϩοΫ(MCKI, BICK, LRCK)ΛࢭΊͯ͸͍͚·ͤΜɻ͜ΕΒͷΫϩ
οΫ͕͞څڙΕͳ͍৔߹ɺ಺෦ʹμΠφϛοΫͳϩδοΫΛ࢖༻͍ͯ͠ΔͨΊɺաిྲྀ͕ྲྀΕɺಈ࡞͕ҟৗ
ʹͳΔՄೳੑ͕͋Γ·͢ɻΫϩοΫΛࢭΊΔ৔߹͸ύϫʔμ΢ϯঢ়ଶ(PMDAC bit = “0”ʣʹ͍ͯͩ͘͠͞ɻ
AK4343
MCKO
MCKI
BICK
LRCK
SDTI
256fs, 512fs or 1024fs
DSP or μP
MCLK
≥ 32fs
BCLK
1fs
LRCK
SDTO
Figure 22. EXT Slave Mode
MS0478-J-02
- 30 -
2010/11