AK4612EQ Datasheet, PDF (48/68 Pages) Asahi Kasei Microsystems – 6/8-Channel Audio CODEC

[AK4612]
■ ADCݸผύϫʔμ΢ϯػೳ


AK4612Ͱ͸ADCύϫʔϚωδϝϯτϏοτPMAD3-1 bitʹΑΓݸผʹύϫʔμ΢ϯΛ͢Δ͜ͱ͕Ͱ͖·͢ɻ
ύϫʔϚωδϝϯτϏοτPMAD3-1 bit͕ “0”ͷͱ͖ɺ֘౰͢ΔADCͷΞφϩά෦ɺσΟδλϧ෦͸ʹڞύϫ
ʔμ΢ϯ͞Ε·͢ɻ֤ADC͸ύϫʔμ΢ϯղআޙɺΞφϩά෦͕ॳظԽ͞Ε·͢ɻΞφϩάೖྗʹର͢Δσ
Οδλϧग़ྗ͸܈஗Ԇ(GD)Λ΋ͪ·͢ɻύϫʔμ΢ϯ࣌ADCग़ྗ͸ “0” σʔλͰ͢ɻΞφϩά෦ͷॳظԽऴ
ྃ࣌ADCग़ྗʹҟԻ͕ग़ྗ͞Ε·͢ɻҟԻ͕໰୊ʹͳΔ৔߹͸σΟδλϧग़ྗΛϛϡʔτͯ͠Լ͍͞ɻ
PMAD3-1 bit
Power Down Channel
4~5/fs (1)
2~3/fs (2)
4~5/fs (1)
2~3/fs (2)
ADCDigital
Internal State
ADC Analog
Internal State
ADC In
(Analog)
Normal Operation Power-down
Normal Operation Power-down
GD ⁽⁴⁾
Normal Operation
Power-down
518/fs (3)
Init Cycle Normal Operation Power-down
Normal Operation
518/fs (3)
Init Cycle
Normal Operation
(4)
GD
ADC Out
(Digital)
(5)
“0”data
(6)
(6)
Normal Operation Channel
ADC In
(Analog)
ADC Out
(Digital)
GD ⁽⁴⁾
(5)
“0”data
GD ⁽⁴⁾
Clock In
MCLK,LRCK,SCLK
஫ɿ
(1) PMAD3-1 bitʹ “0”Λॻ͖ࠐΜͰ͔Β֘౰͢ΔADC͕ύϫʔμ΢ϯ͢Δ·Ͱ4~5/fs ͔͔Γ·͢ɻ
(2) PMAD3-1 bitʹ “1”Λॻ͖ࠐΜͰ͔ΒॳظԽαΠΫϧ͕։࢝͢Δ·Ͱ2∼3/fs͔͔Γ·͢ɻ
(3) ADC͸ύϫʔμ΢ϯղআޙɺΞφϩά෦͕ॳظԽ͞Ε·͢ɻ
(4) Ξφϩάೖྗʹର͢ΔσΟδλϧग़ྗ͸܈஗Ԇ(GD)Λ΋ͪ·͢ɻ
(5) ύϫʔμ΢ϯ࣌ADCग़ྗ͸ “0” σʔλͰ͢ɻ
(6) Ξφϩά෦ͷॳظԽऴྃ࣌ADCग़ྗʹҟԻ͕ग़ྗ͞Ε·͢ɻҟԻ͕໰୊ʹͳΔ৔߹͸σΟδλϧग़
ྗΛϛϡʔτͯ͠Լ͍͞ɻ
Figure 47. ADCݸผύϫʔμ΢ϯྫ
MS1039-J-01
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2009/06