AK5701 Datasheet, PDF (26/62 Pages) Asahi Kasei Microsystems – PLL & MIC-AMP 16-Bit Stereo ADC

ASAHI KASEI
[AK5701]
„ EXT Slave Mode (PMPLL bit = “0”, M/S bit = “0”)
PMPLL bitΛ“0”ʹ͢Δ͜ͱͰɺ֎෦ΫϩοΫεϨʔϒϞʔυ(EXT Slave Mode)Ͱಈ࡞͠ɺMCKI pin͔ΒPLL
Λհͣ͞ʹ௚઀ɺADCʹϚελΫϩοΫΛೖྗͰ͖·͢ɻ͜ͷϞʔυ͸௨ৗͷΦʔσΟΦCODECͱͷI/Fʹ
ରͯ͠׵ޓੑ͕͋Γ·͢ɻඞཁͳΫϩοΫ͸MCKI (256fs, 512fs or 1024fs), EXBCLK (≥32fs), EXLRCK(fs)Ͱ͢ɻ
MCKIͱEXLRCK͸ಉ͢ظΔඞཁ͕͋Γ·͕͢Ґ૬Λ߹ΘͤΔඞཁ͸͋Γ·ͤΜɻMCKIͷೖྗप೾਺͸
FS1-0 bitʹΑΓબ୒͢Δ͜ͱ͕ՄೳͰ͢ɻ(See Table 11)
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
Don’t care
0
1
1024fs
7.35kHz ∼ 13kHz
Don’t care
1
0
512fs
7.35kHz ∼ 26kHz
Don’t care
1
1
256fs
7.35kHz ∼ 48kHz Default
Table 11. EXT Slave Mode (PMPLL bit = “0”, M/S bit = “0”) ࣌ͷMCKIप೾਺ͷઃఆ
ADC͕ಈ࡞த(PMADL bit = “1” or PMADR bit = “1”)͸֎෦ΫϩοΫ(MCKI, EXBCLK, EXLRCK)ΛࢭΊͯ͸͍
͚·ͤΜɻ͜ΕΒͷΫϩοΫ͕͞څڙΕͳ͍৔߹ɺ಺෦ʹμΠφϛοΫͳϩδοΫΛ࢖༻͍ͯ͠ΔͨΊɺա
ిྲྀ͕ྲྀΕɺಈ࡞͕ҟৗʹͳΔՄೳੑ͕͋Γ·͢ɻΫϩοΫΛࢭΊΔ৔߹͸ύϫʔμ΢ϯঢ়ଶ
(PMADL=PMADR bits = “0”)ʹ͍ͯͩ͘͠͞ɻ
AK5701
MCKO
MCKI
EXBCLK
EXLRCK
256fs, 512fs or 1024fs
DSP or µP
MCLK
≥ 32fs
BCLK
1fs
LRCK
SDTO
SDTI
Figure 22. EXT Slave Mode
MS0404-J-00
- 26 -
2005/08