AK4612EQ Datasheet, PDF (44/68 Pages) Asahi Kasei Microsystems – 6/8-Channel Audio CODEC

[AK4612]
■ ιϑτϛϡʔτػೳ
ιϑτϛϡʔτ͸σΟδλϧతʹ࣮ߦ͞Ε·͢ɻSMUTE bitΛ “1” ʹ͢Δͱͦͷ࣌఺ͷATTઃఆ஋͔Βઃఆ͞
ΕͨσΟδλϧϘϦϡʔϜͷભҠ࣌ؒ (Table 18)Ҏ಺Ͱೖྗσʔλ͕-∞ (“0”)·ͰΞςωʔγϣϯ͞Ε·͢ɻ
SMUTE bitΛ “0” ʹ͢Δͱɺ-∞͔Βઃఆ͞ΕͨσΟδλϧϘϦϡʔϜͷભҠ࣌ؒ (Table 18)Ҏ಺ͰATTઃఆ஋
·Ͱ෮͢·͠ؼɻιϑτϛϡʔτ։࢝ޙɺ-∞·ͰΞςωʔγϣϯ͞ΕΔલʹղআ͞ΕΔͱΞςωʔγϣϯ͕
தஅ͞Εɺಉ͡αΠΫϧͰATTઃఆ஋·Ͱ෮͢·͠ؼɻιϑτϛϡʔτػೳ͸৴߸ΛࢭΊͣʹ৴߸ݯΛ੾Γ
ସ͑Δ৔߹ͳͲʹ༗ޮͰ͢ɻ
SMUTE bit
ATT Level
(1)
Attenuation
(2)
(4)
-∞
GD
GD
(3)
AOUT
DZF1,2
(5)
8192/fs
஫:
(1) ઃఆ͞ΕͨσΟδλϧϘϦϡʔϜͷભҠ࣌ؒ (Table 18)Ҏ಺Ͱ-∞ (“0”)·ͰΞςωʔγϣϯ͞Ε·͢ɻྫ
͑͹ɺMode 0࣌ɺATTઃఆ஋͕ “00H”ͷ৔߹͸4096/fsαΠΫϧͰ͢ɻιϑτϛϡʔτͰભҠ͢ΔATT஋
͸00HʙFFHͰ͢ɻ
(2) ઃఆ͞ΕͨσΟδλϧϘϦϡʔϜͷભҠ࣌ؒ (Table 18)Ҏ಺ͰATTઃఆ஋·Ͱ෮͢·͠ؼɻྫ͑͹ɺMode
0࣌ɺATTઃఆ஋͕ “FFH”ͷ৔߹͸4096/fsαΠΫϧͰ͢ɻιϑτϛϡʔτͰભҠ͢ΔATT஋͸FFHʙ00H
Ͱ͢ɻ
(3) σΟδλϧೖྗʹରͯ͠Ξφϩάग़ྗ͸܈஗Ԇ(GD)Λ࣋ͪ·͢ɻ
(4) ιϑτϛϡʔτ։࢝ޙɺ-∞·ͰΞςωʔγϣϯ͞ΕΔલʹղআ͞ΕΔͱΞςωʔγϣϯ͕தஅ͞Εɺಉ
͡αΠΫϧͰATTઃఆ஋·Ͱ෮͢·͠ؼɻ
(5) άϧʔϓͷશνϟωϧͷೖྗσʔλ͕8192ճ࿈ଓͯ͠ “0” ͷ৔߹ɺDZF1, 2 pin͸ “H” ʹͳΓ·͢ɻ
ͦͷޙάϧʔϓ1ʢάϧʔϓ2ʣͷ͍ͣΕ͔ͷνϟωϧͷೖྗσʔλ͕ “0” Ͱͳ͘ͳΔͱɺDZF1(DZF2) pin
͸ “L” ʹͳΓ·͢ɻ
Figure 43. ιϑτϛϡʔτػೳͱθϩݕग़ػೳ
■
γεςϜϦηοτ

ݯిON ࣌ʹ͸ɺPDN pinʹҰ౓ “L” Λೖྗͯ͠Ϧηοτͯ͠Լ͍͞ɻVCOMجͲͳ४ిѹͷύϫʔμ΢ϯ͸
MCLK Ͱղআ͞Εɺͦͷ ޙLRCK ͷ “↑” ʹಉ಺ͯ͠ظ෦ճ࿏͕ύϫʔΞοϓ͠ɺ಺෦ͷλΠϛϯά͕ಈ࡞͠
·͢ɻLRCK ͕ೖྗ͞ΕΔ·ͰADC, DAC͸ύϫʔμ΢ϯঢ়ଶͰ͢ɻ
MS1039-J-01
- 44 -
2009/06