AK4642VN Datasheet, PDF (27/82 Pages) Asahi Kasei Microsystems – 16-Bit ΔΣ Stereo CODEC with MIC/HP/SPK-AMP

ASAHI KASEI
[AK4642]
„ PLL Slave Mode (PMPLL bit = “1”, M/S bit = “0”)
MCKI, BICK or LRCK pin΁ೖྗ͞ΕΔΫϩοΫΛج४ʹ಺෦ͷPLLʹͯAK4642ʹඞཁͳΫϩοΫΛੜ੒͠
·͢ɻPLLͷج४ΫϩοΫ͸ɺPLL3-0 bitʹͯઃఆ͢Δ͜ͱ͕Ͱ͖·͢(Table 4)ɻ
a) PLL ج४ΫϩοΫ: BICK or LRCK pin
FS3-0 bitΛઃఆ͢Δ͜ͱͰɺ7.35kHz ∼ 48kHzͷ೚ҙͷαϯϓϦϯάप೾਺ʹରԠ͠·͢ɻ(See Table 6.)
AK4642
MCKO
MCKI
BICK
LRCK
SDTO
SDTI
DSP or µP
32fs, 64fs
1fs
BCLK
LRCK
SDTI
SDTO
Figure 14. PLL Slave Mode 1 (PLL Reference Clock: LRCK or BICK pin)
b) PLL ج४ΫϩοΫ: MCKI pin
MCKOʹಉͨ͠ظBICK, LRCKΛೖྗ͠·͢ɻMCKOͱLRCK͸ಉ͢ظΔඞཁ͕͋Γ·͕͢Ґ૬Λ߹ΘͤΔඞ
ཁ͸͋Γ·ͤΜɻϚελΫϩοΫग़ྗ(MCKO pin)͸PS1-0 bit (Table 9)Ͱઃఆ͞Εͨप೾਺Λग़ྗ͠ɺMCKO
bitͰON/OFFՄೳͰ͢ɻαϯϓϦϯάप೾਺͸ɺFS3-0 bitͰઃఆ͢Δ͜ͱ͕Ͱ͖·͢ɻ(See Table 5)
AK4642
11.2896MHz, 12MHz, 12.288MHz
13.5MHz, 24MHz, 27MHz
DSP or µP
MCKI
MCKO
BICK
LRCK
256fs/128fs/64fs/32fs
≥ 32fs
1fs
MCLK
BCLK
LRCK
SDTO
SDTI
SDTI
SDTO
Figure 15. PLL Slave Mode 2 (PLL Reference Clock: MCKI pin)
ADC or DAC͕ಈ࡞த(PMADL bit = “1”, PMADR bit = “1” or PMDAC bit = “1”)͸֎෦ΫϩοΫ(MCKI, BICK,
LRCK)ΛࢭΊͯ͸͍͚·ͤΜɻ͜ΕΒͷΫϩοΫ͕͞څڙΕͳ͍৔߹ɺ಺෦ʹμΠφϛοΫͳϩδοΫΛ࢖
༻͍ͯ͠ΔͨΊɺաిྲྀ͕ྲྀΕɺಈ࡞͕ҟৗʹͳΔՄೳੑ͕͋Γ·͢ɻΫϩοΫΛࢭΊΔ৔߹͸ύϫʔμ΢
ϯঢ়ଶ(PMADL=PMADR=PMDAC bits = “0”)ʹ͍ͯͩ͘͠͞ɻ
MS0358-J-02
- 27 -
2005/04