AK4589 Datasheet, PDF (34/76 Pages) Asahi Kasei Microsystems – 2/8 CHANNEL AUDIO CODEC WITH DIR

ASAHI KASEI
[AK4589]
σΟδλϧϘϦϡʔϜػೳ
AK4589͸νϟωϧಠཱσΟδλϧϘϦϡʔϜ(128Ϩϕϧ, 0.5dBεςοϓ)Λ಺ଂ͍ͯ͠·͢ɻݮਰྔ͸Ϩδε
λͷATT7-0 bitͰͦΕͧΕઃఆ͠·͢(Table 15)ɻ
ATT7-0
00H
01H
02H
:
7DH
7EH
7FH
FEH
FFH
Attenuation Level
0dB
-0.5dB
-1.0dB
:
-62.5dB
-63dB
MUTE (-∞)
:
MUTE (-∞)
MUTE (-∞)
Default
Table 15.σΟδλϧϘϦϡʔϜͷݮਰྔ
ATT7-0ઃఆ஋ؒͷભҠ࣌ؒ͸ATS1-0 bitͰઃఆ͠·͢(Table 16)ɻMode0ͱMode1Ͱ͸ઃఆ஋ؒͷભҠ͸ιϑτ
ભҠͰ͢ɻ͕ͨͬͯ͠ɺભҠதʹεΠονϯάϊΠζ͸ൃੜ͠·ͤΜɻ
Mode
0
1
2
3
ATS1
0
0
1
1
ATS0
0
1
0
1
ATT speed
1792/fs
896/fs
256/fs
256/fs
Default
Table 16.σΟδλϧϘϦϡʔϜͷATT7-0ઃఆ஋ؒͷભҠ࣌ؒ
Mode0ͷ৔߹ɺATTઃఆؒͷભҠ͸1792ϨϕϧͰιϑτભҠ͠·͢ɻ00H(0dB)͔Β7FH(MUTE)·Ͱʹ͸1792/fs
(37.3ms@fs=48kHz)͔͔Γ·͢ɻPDN pinΛ “L” ʹ͢ΔͱɺATT7-0͸00HظॳʹԽ͞Ε·͢ɻATT7-0͸RSTN1
bitΛ “0” ʹ͢ΔͱҰ୴00HʹͳΓɺRSTN1 bitΛ “1” ʹ໭͢ͱઃఆ஋ʹ໭͍͖ͬͯ·͢ɻ
MS0339-J-00
- 34 -
2004/09