AK4631 Datasheet, PDF (26/69 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK-AMP

ASAHI KASEI
[AK4631]
„ PLL Slave Mode (PMPLL bit = “1”, M/S bit = “0”)
MCKI, BICK or FCK pin΁ೖྗ͞ΕΔΫϩοΫΛج४ʹ಺෦ͷPLLʹͯAK4631ʹඞཁͳΫϩοΫΛੜ੒͠·
͢ɻPLLͷج४ΫϩοΫ͸ɺPLL3-0 bitʹͯઃఆ͢Δ͜ͱ͕Ͱ͖·͢ɻ·ͨɺBICKग़ྗ͕16fsͷ৔߹͸ɺΦʔ
σΟΦI/F͸DSPϞʔυͷΈରԠ͠·͢ɻ
a) PLL ج४ΫϩοΫ: BICK or FCK pin
FS3-0 bitΛઃఆ͢Δ͜ͱͰɺBICK ΫϩοΫ Λج४ͱ͢Δ৔߹͸ 7.35kHz ∼ 48kHzɺFCKΫϩοΫΛج४
ͱ͢Δ৔߹͸7.35kHz ∼ 26kHz ͷ೚ҙͷαϯϓϦϯάप೾਺ʹରԠ͠·͢ɻ(See Table 6)
AK4631
MCKO
MCKI
BICK
FCK
SDTO
SDTI
DSP or µP
16fs, 32fs, 64fs
1fs
BCLK
FCK
SDTI
SDTO
Figure 19. PLL Slave Mode 1 (PLL Reference Clock: FCK or BICK pin)
b) PLL ج४ΫϩοΫ: MCKI pin
MCKOʹಉͨ͠ظBICK, FCKΛೖྗ͠·͢ɻMCKOͱFCK͸ಉ͢ظΔඞཁ͕͋Γ·͕͢Ґ૬Λ߹ΘͤΔ
ඞཁ͸͋Γ·ͤΜɻαϯϓϦϯάप೾਺͸ɺFS3-0 bitͰઃఆ͢Δ͜ͱ͕Ͱ͖·͢ɻ(See Table 5)
AK4631
11.2896MHz, 12MHz, 12.288MHz
13.5MHz, 24MHz, 27MHz
DSP or µP
MCKI
MCKO
BICK
FCK
256fs
16fs, 32fs, 64fs
1fs
MCLK
BCLK
FCK
SDTO
SDTI
SDTI
SDTO
Figure 20. PLL Slave Mode 2 (PLL Reference Clock: MCKI pin)
ADC or DAC͕ಈ࡞தʢPMADC bit = “1” or PMDAC bit = “1”ʣ͸֎෦ΫϩοΫ(MCKI, BICK, FCK)ΛࢭΊͯ͸
͍͚·ͤΜɻ͜ΕΒͷΫϩοΫ͕͞څڙΕͳ͍৔߹ɺ಺෦ʹμΠφϛοΫͳϩδοΫΛ࢖༻͍ͯ͠ΔͨΊɺ
աిྲྀ͕ྲྀΕɺಈ࡞͕ҟৗʹͳΔՄೳੑ͕͋Γ·͢ɻΫϩοΫΛࢭΊΔ৔߹͸ύϫʔμ΢ϯঢ়ଶʢPMADC bit
= PMDAC bit = “0”ʣʹ͍ͯͩ͘͠͞ɻ
MS0317-J-01
- 26 -
2004/11