AK4589 Datasheet, PDF (43/76 Pages) Asahi Kasei Microsystems – 2/8 CHANNEL AUDIO CODEC WITH DIR

ASAHI KASEI
[AK4589]
ಈ࡞આ໌ (DIR/DIT෦)
Non-PCM/DTS-CDσʔλετϦʔϜࣗಈݕग़ػೳ
AK4589͸Non-PCMσʔλετϦʔϜͷݕग़ػೳΛ΋ͪ·͢ɻDolby “AC-3 Data Stream in IEC60958 Interface”ʹ
४ͨ͠ڌ32Ϗοτ ModeͷNon-PCMσʔλϓϦΞϯϒϧ͕ݕग़͞ΕΔͱ͖AUTO bit͕ “1”ʹͳΓ·͢ɻϓϦΞ
ϯϒϧͷ96Ϗοτ sync code͸ 0x0000, 0x0000, 0x0000, 0x0000, 0xF872 and 0x4E1FͰߏ੒͞Ε·͢ɻ࣍ͷ4096
ϑϨʔϜͰsync codeݕ͕ग़͞Εͳ͍৔߹ɺ͞Βʹsync codeݕ͕ग़͞ΕΔ·ͰAUTO bit͸ “0”Ͱ͢ɻ·ͨɺ͜ͷ
ϓϦΞϯϒϧ͕ݕग़͞Εͨ৔߹ɺsync codeʹଓ͍ͯ2όΠτ(Pc, Pd)ΛϨδελʹ֨ೲ͠·͢ɻಉ༷ʹDTS-CD
ͷσʔλϓϦΞϯϒϧ͕ݕग़͞ΕΔͱDTSCD bit͕ “1”ʹͳΓ·͢ɻ࣍ͷ4096ϑϨʔϜͰsync codeݕ͕ग़͞Ε
ͳ͍৔߹ɺ͞Βʹsync codeݕ͕ग़͞ΕΔ·ͰDTSCD bit͸ “0”Ͱ͢ɻ
192kHzରԠΫϩοΫϦΧόϦճ࿏
಺ଂ͢Δ௿δολPLL͸32kHz͔Β192kHzͷϩοΫϨϯδΛ΋ͪɺϩοΫ࣌ؒ͸20msҎԼͰ͢ɻ·ͨɺਫথൃ
ৼճ࿏ͷϦϑΝϨϯεΫϩοΫए͘͠͸νϟωϧεςʔλεͷαϯϓϦϯάप೾਺৘ใΛ༻͍ɺαϯϓϧϨʔ
τ(32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz)Λݕग़͠·͢ɻਖ਼ִ͍ؒ͠ͰϓϦΞϯϒϧΛड৴
͠ͳ͍ͱಉ֎ظΕ͕͜ىΓ·͢ɻ
ϚελΫϩοΫग़ྗ
AK4589͸ϚελΫϩοΫग़ྗϐϯΛ2ϐϯ΋ͪ·͢ɻϚελΫϩοΫιʔεͱͯ͠PLLͰϦΧόϦͨ͠Ϋϩο
Ϋ·ͨ͸֎෇͚ͷX'talͰൃৼͨ͠ΫϩοΫͷͲͪΒ͔Λબ୒Ͱ͖·͢(Table 17)ɻϚελΫϩοΫग़ྗ(MCKO1,
MCKO2)ͼٴX’talͷप೾਺ͷfsʹର͢Δൺ͸OCKS1-0 bitͰઃఆ͠·͢ɻ96kHz࣌͸512fsɺ192kHz࣌͸256fs,512fs
͕ग़ྗ͞Ε·ͤΜɻ
No. OCKS1 OCKS0 MCKO1 MCKO2
X’tal
fs (max)
0
0
0
256fs
256fs
256fs
96 kHz
1
0
2
1
3
1
1
256fs
128fs
256fs
0
512fs
256fs
512fs
1
128fs
64fs
128fs
96 kHz
48 kHz
192 kHz
Table 17. ϚελΫϩοΫग़ྗप೾਺બ୒ (Stereo mode࣌)
ϚελΫϩοΫಈ࡞Ϟʔυ
Default
ΦʔσΟΦग़ྗσʔλͱͯ͠RXσʔλΛબ୒͢Δ͔DAUX2σʔλΛબ୒͢Δ͔͸CM1-0 bitͰઃఆ͞Ε·͢ɻ
Mode 2Ͱ͸PLL͕UnlockʹͳΔͱΫϩοΫιʔε͕ࣗಈతʹX'talʹ੾ΓସΘΓ·͢ɻMode 3Ͱ͸ΫϩοΫιʔ
ε͸X’talݻʹఆͰ͕͢ɺνϟωϧεςʔλε౳ͷRXσʔλ͸ϞχλʔͰ͖·͢ɻMode 2, 3Ͱ͸PLLͱX'talͷप
೾਺͕ॏͳΒͳΒͳ͍Α͏ʹઃఆ͢Δ͜ͱΛਪ঑͠·͢ɻ
Mode CM1 CM0 UNLOCK PLL
X'tal Clock source SDTO
0
0
0
-
ON ON(Note)
PLL
RX
Default
1
0
1
-
OFF
ON
X'tal
DAUX2
2
1
0
3
1
1
0
ON
ON
1
ON
ON
-
ON
ON
PLL
RX
X'tal
DAUX2
X'tal
DAUX2
ON:ൃৼ (Power-up), OFF:ൃৼఀࢭ (Power-Down)
Note: X’talΛϦϑΝϨϯεΫϩοΫʹ࢖༻͠ͳ͍৔߹(XTL1-0 pin = “H,H”)͸OFFͰ͢ɻ
Table 18. ΫϩοΫಈ࡞Ϟʔυબ୒
MS0339-J-00
- 43 -
2004/09