AK5701 Datasheet, PDF (27/62 Pages) Asahi Kasei Microsystems – PLL & MIC-AMP 16-Bit Stereo ADC

ASAHI KASEI
[AK5701]
„ EXT Master Mode (PMPLL bit = “0”, M/S bit = “1”, TE3-0 bits = “0101”, TMASTER bit = “1”)
Figure 49ͷखॱྫʹैͬͯϨδελΛઃఆ͢Δ͜ͱͰɺ֎෦ΫϩοΫϚελϞʔυ(EXT Master Mode)Ͱಈ࡞
͠ɺMCKI pin͔ΒPLLΛհͣ͞ʹ௚઀ɺADCʹϚελΫϩοΫΛೖྗͰ͖·͢ɻඞཁͳΫϩοΫ͸MCKI
(256fs, 512fs or 1024fs)Ͱ͢ɻMCKIͷೖྗप೾਺͸FS1-0 bitʹΑΓબ୒͢Δ͜ͱ͕ՄೳͰ͢(See Table 12)ɻ
Mode
0
1
2
3
FS3-2 bits
Don’t care
Don’t care
Don’t care
Don’t care
FS1 bit FS0 bit
MCKI Input
Frequency
Sampling Frequency
Range
0
0
256fs
7.35kHz ∼ 48kHz
0
1
1024fs
7.35kHz ∼ 13kHz
1
0
1
1
512fs
256fs
7.35kHz ∼ 26kHz
7.35kHz ∼ 48kHz
Table 12. EXT Master Mode࣌ͷMCKIप೾਺ͷઃఆ
Default
ADC͕ಈ࡞த(PMADL bit = “1” or PMADR bit = “1”)͸MCKIΛࢭΊͯ͸͍͚·ͤΜɻMCKI͞څڙ͕Εͳ͍৔
߹ɺ಺෦ʹμΠφϛοΫͳϩδοΫΛ࢖༻͍ͯ͠ΔͨΊɺաిྲྀ͕ྲྀΕɺಈ࡞͕ҟৗʹͳΔՄೳੑ͕͋Γ·
͢ɻMCKIΛࢭΊΔ৔߹͸ύϫʔμ΢ϯঢ়ଶ(PMADL=PMADR bits = “0”)ʹ͍ͯͩ͘͠͞ɻ
AK5701
MCKO
MCKI
BCLK
LRCK
SDTO
256fs, 512fs or 1024fs
DSP or µP
MCLK
32fs or 64fs
BCLK
1fs
LRCK
SDTI
Figure 23. EXT Master Mode
BCKO1 bit BCKO0 bit BCLKग़ྗप೾਺
0
0
N/A
0
1
1
0
32fs
Default
64fs
1
1
N/A
Table 13. BCLK Output Frequency at Master Mode
MS0404-J-00
- 27 -
2005/08