AK4612EQ Datasheet, PDF (49/68 Pages) Asahi Kasei Microsystems – 6/8-Channel Audio CODEC

[AK4612]
■ DACݸผύϫʔμ΢ϯػೳ
AK4612Ͱ͸DACύϫʔϚωδϝϯτϏοτPMDA4-1 bitʹΑΓݸผʹύϫʔμ΢ϯΛ͢Δ͜ͱ͕Ͱ͖·͢ɻ
ύϫʔϚωδϝϯτϏοτ͕ “0”ͷͱ͖ɺ֘౰͢ΔDACͷΞφϩά෦ɺσΟδλϧ෦͸ʹڞύϫʔμ΢ϯ͞
Ε·͢ɻPMDA4-1 bitʹΑΓύϫʔμ΢ϯ͞ΕͨDACͷΞφϩάग़ྗ͸DVMPD pin = “L”Ͱ͋Ε͹VCOMిѹɺ
DVMPD pin = “H”Ͱ͋Ε͹Hi-ZʹͳΓ·͢ɻ·ͨDZFݕग़͸ߦ͍ͬͯ·͕͢ɺDZFݕग़݁Ռ͸DZF1-2 pinʹ൓
ө͞Εͳ͘ͳΓ·͢ɻύϫʔμ΢ϯͷઃఆɾղআͷ྆ํͰҟԻ͕ੜ͡ΔͨΊɺ໰୊ʹͳΔ৔߹͸֎෦Ͱϛϡ
ʔτɺ΋͘͠͸PMDAC bit = “0”·ͨ͸RSTN bit = “0”ͷ࣌ʹPMDA4-1 bitͷઃఆΛߦ͍ͬͯͩ͘͞ɻFigure 48
ʹPMDA4-1 bitʹΑΔύϫʔμ΢ϯͼٴύϫʔΞοϓ࣌ͷγʔέϯεΛࣔ͠·͢ɻ
PMDA4-1 bit
Power Down Channel
4~5/fs (4)
DAC Digital
Internal State
Normal Operation
DAC Analog
Internal State
Normal Operation
2~3/fs (5)
4~5/fs (4)
2~3/fs (5)
Power-down
Power-down
Normal Operation
516/fs (6)
Power-down
Init Cycle Normal Operation Power-down
Normal Operation
516/fs (6)
Init Cycle Normal Operation
DAC In
(Digital)
DAC Out
(Analog)
DZF Detect
Internal State
(1)
GD
(3) ₍₂₎
8192/fs
(7)
Normal Operation Channel
DAC In
(Digital)
DAC Out
(Analog)
“0”data
GD
8192/fs
DZF Detect
Internal State
“0”dat a
(3)
(3) ₍₂₎
(7)
GD
GD
(3)
Clock In
MCLK,LRCK,SCLK
(8)
DZF1/DZF2
(9)
஫ɿ
(1) σΟδλϧೖྗʹର͢ΔΞφϩάग़ྗ͸܈஗Ԇ(GD)Λ΋ͪ·͢ɻ
(2) PMDA4-1 bitͰύϫʔμ΢ϯ͞ΕͨDACͷΞφϩάग़ྗ͸DVMPD pin = “L”Ͱ͋Ε͹VCOMిѹɺ
DVMPD pin = “H”Ͱ͋Ε͹Hi-ZͰ͢ɻ
(3) PMDA4-1 bitʹ“0”Λॻ͖ࠐΜͰ͔Β4~5/fsͰɺPMDA4-1 bitʹ “1”Λॻ͖ࠐΜͰ͔Β518∼519/fs ͰDAC
ͷग़ྗʹ͸ҟԻ͕ग़ྗ͞Ε·͢ɻ
(4) PMDA4-1 bitʹ “0”Λॻ͖ࠐΜͰ͔Β֘౰͢ΔDAC͕ύϫʔμ΢ϯ͢Δ·Ͱ4~5/fs ͔͔Γ·͢ɻ
(5) PMDA4-1 bitʹ “1”Λॻ͖ࠐΜͰ͔ΒॳظԽαΠΫϧ͕։࢝͢Δ·Ͱ2∼3/fs͔͔Γ·͢ɻ
(6) DAC͸ύϫʔμ΢ϯղআޙɺΞφϩά෦͕ॳظԽ͞Ε·͢ɻ
(7) ύϫʔμ΢ϯ͞ΕͨDACͰ͸DZFݕग़͸ߦ͍ͬͯ·͕͢ɺݕग़݁Ռ͸DZF1-2 pinʹ͸൓ө͞Ε·ͤ
Μɻ
(8) ύϫʔμ΢ϯઃఆʹΑΓɺύϫʔμ΢ϯ͞ΕͨDACͷDZFݕग़݁Ռ͕ແࢹ͞ΕɺDZF1-2 pin͕ “H”ʹ
ͳΓ·͢ɻ
(9) ύϫʔμ΢ϯΛߦΘͳ͍DACʹೖྗ͕͋Δ৔߹ʹɺݸผύϫʔμ΢ϯΛߦͬͯ΋DZF1-2 pin͸ “H”
ʹ͸ͳΓ·ͤΜɻҟԻ͕໰୊ʹͳΔ৔߹ʹ͸Ξφϩάग़ྗΛ֎෦Ͱϛϡʔτ͍ͯͩ͘͠͞ɻ
Figure 48. DACݸผύϫʔμ΢ϯྫ
MS1039-J-01
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2009/06