AK4343VN Datasheet, PDF (31/99 Pages) Asahi Kasei Microsystems – Stereo DAC with HP/RCV/SPK-AMP

[AK4343]
■ EXT Master Mode (PMPLL bit = “0”, M/S bit = “1”)
PMPLL bit = “0”͓ΑͼM/S bit = “1”ʹઃఆ͢Δ͜ͱͰɺ֎෦ΫϩοΫϚελϞʔυ(EXT Master Mode)Ͱಈ࡞
͠ɺMCKI pin͔ΒPLLΛհͣ͞ʹ௚઀ɺDACʹϚελΫϩοΫΛೖྗͰ͖·͢ɻඞཁͳΫϩοΫ͸MCKI
(256fs, 512fs or 1024fs)Ͱ͢ɻMCKIͷೖྗप೾਺͸FS1-0 bitsʹΑΓબ୒͢Δ͜ͱ͕ՄೳͰ͢(Table 14)ɻ
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 14. EXT Master Mode (PMPLL bit = “0”, M/S bit = “1”)࣌ͷMCKIप೾਺ͷઃఆ
௿଎αϯϓϦϯά࣌͸ଳҬ֎ϊΠζͷͨΊɺDACग़ྗͷS/N͕ྼԽ͠·͢ɻMCKIʹೖྗ͞ΕΔϚελΫϩο
Ϋͷप೾਺Λ্͛Δ͜ͱͰɺS/NΛվળͰ͖·͢ɻTable 15͸DACग़ྗ͔ΒLOUT/ROUT pinʹ௨ͨ͠৔߹ͷ
S/NͰ͢ɻ
MCKI
S/N
(fs=8kHz, 20kHzLPF + A-weighted)
256fs
83dB
512fs
93dB
1024fs
93dB
Table 15. Relationship between MCKI and S/N of LOUT/ROUT pins
DAC͕ಈ࡞த(PMDAC bit = “1”)͸MCKIΛࢭΊͯ͸͍͚·ͤΜɻMCKI͞څڙ͕Εͳ͍৔߹ɺ಺෦ʹμΠφϛ
οΫͳϩδοΫΛ࢖༻͍ͯ͠ΔͨΊɺաిྲྀ͕ྲྀΕɺಈ࡞͕ҟৗʹͳΔՄೳੑ͕͋Γ·͢ɻMCKIΛࢭΊΔ
৔߹͸ύϫʔμ΢ϯঢ়ଶ(PMDAC bit = “0”)ʹ͍ͯͩ͘͠͞ɻ
AK4343
MCKO
MCKI
BICK
LRCK
SDTI
256fs, 512fs or 1024fs
DSP or μP
MCLK
32fs or 64fs
BCLK
1fs
LRCK
SDTO
Figure 23. EXT Master Mode
BCKO bit BICKग़ྗप೾਺
0
32fs
(default)
1
64fs
Table 16. BICK Output Frequency at Master Mode
MS0478-J-02
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2010/11