AK4642VN Datasheet, PDF (74/82 Pages) Asahi Kasei Microsystems – 16-Bit ΔΣ Stereo CODEC with MIC/HP/SPK-AMP

ASAHI KASEI
[AK4642]
„ εϐʔΧग़ྗ
FS3-0 bits _X,XXX
(Addr:05H, D5&D2-0)
DACS bit
(Addr:02H, D3)
(1)
(2)
SPKG1-0 bits
(Addr:03H, D4-3)
ALC Control 1
(Addr:06H)
ALC Control 2
(Addr:08H)
00
XXH
XXH
(3)
(4)
(5)
1,111
01
28H
C1H
Example:
PLL Master Mode
(13)
Audio I/F Format: MSB justified (ADC & DAC)
Sampling Frequency: 44.1kHz
Digital Volume: 0dB
ALC: Enable
(1) Addr:05H, Data:27H
(2) Addr:02H, Data:20H
(3) Addr:03H, Data:08H
(4) Addr:06H, Data:28H
ALC Control 3
(Addr:0BH)
ALC bit
(Addr:07H, D5)
IVL/R7-0 bits
(Addr:09H&0CH, D7-0)
DVL/R7-0 bits
(Addr:0AH&0DH, D7-0)
PMDAC bit
(Addr:00H, D2)
PMBP bit
(Addr:00H, D5)
PMSPK bit
(Addr:00H, D4)
SPPSN bit
(Addr:02H, D7)
SPP pin
XXH
0
E1H
18H
(6)
(7)
00H
X
91H
(8)
XXH
(9)
(14)
(10)
Hi-Z
(11)
(12)
Normal Output
Hi-Z
(5) Addr:08H, Data:E1H
(6) Addr:0BH, Data:00H
(7) Addr:07H, Data:20H
(8) Addr:09H & 0CH, Data:91H
(9) Addr:0AH & 0DH, Data:28H
(10) Addr:00H, Data:74H
(11) Addr:02H, Data:A0H
Playback
(12) Addr:02H, Data:20H
(13) Addr:02H, Data:00H
SPN pin
Hi-Z
HVDD/2 Normal Output HVDD/2 Hi-Z
(14) Addr:00H, Data:40H
Figure 51. Speaker-Amp Output Sequence
<खॱྫ>
ʮΫϩοΫͷઃఆʯͷ߲Λࢀর͠ɺΫϩοΫΛͯ͠څڙԼ͍͞ɻ
(1) αϯϓϦϯάप೾਺(FS3-0 bits)Λઃఆͯ͠Լ͍͞ɻPLLϞʔυͷ৔߹ɺαϯϓϦϯάप೾਺Λมߋ͠
͔ͯΒͷPLLϩοΫ࣌ؒΛߟྀ͠ɺ(5)ͷDACͼٴεϐʔΧͷύϫʔΞοϓΛߦͬͯԼ͍͞ɻ
(2) DAC Æ SPK-Ampͷύεͷઃఆ: DACS bit = “0” Æ “1”
(3) SPK-AmpήΠϯઃఆ: SPKG1-0 bits = “00” ˠ “01”
(4) ALC Timer (ΞυϨε 06H)ͷઃఆ
(5) ALC REF஋(ΞυϨε 08H)ͷઃఆ
(6) LMTH1, RGAIN1 bitsͷઃఆ(ΞυϨε 0BH)
(7) LMTH0, RGAIN0, LMAT1-0, ALC bitsͷઃఆ(ΞυϨε 07H)
PMADL bit = “1”·ͨ͸PMADR bit = “1”ͷͱ͖ɺDACͷALC͸ແޮͰ͢ɻ
(8) ೖྗσΟδλϧϘϦϡʔϜ(ΞυϨε09H&0CH)ͷઃఆ
PMADL = PMADR bits = “0”ͷͱ͖IVL7-0 = IVR7-0 bits = “91H”(0dB)ʹઃఆͯ͠Լ͍͞ɻ
(9) ग़ྗσΟδλϧϘϦϡʔϜ(ΞυϨε0AH&0DH)ͷઃఆɻ
DVOLC bit = “1”(default)ͷͱ͖ɺDVL7-0bits(0AH)ͰLch͓ΑͼRchͷ྆ํͷϘϦϡʔϜΛઃఆ͠·
͢ɻDAC͕ύϫʔΞοϓ͞ΕͨޙɺDefault஋(0dB)͔Βઃఆͨ͠஋ʹιϑτભҠ͍͖ͯ͠·͢ɻ
(10) DAC, Beep-AmpͼٴεϐʔΧͷύϫʔΞοϓ: PMDAC = PMBP = PMSPK bits = “0” → “1”
ظॳԽαΠΫϧத(1059/fs=24ms@fs=44.1kHz)ɺDACೖྗσʔλ͸಺෦Ͱ2’sίϯϓϦϝϯτͷ “0”ʹ
ݻఆ͞Ε·͢ɻॳظԽ͕αΠΫϧऴྃ͢ΔͱɺDACͷ܈஗Ԇ(21.8/fs=0.5ms@fs=44.1kHz)ܦաޙɺDAC
ग़ྗ͸σΟδλϧೖྗ৴߸ʹ૬౰͢ΔిѹʹͳΓ·͢ɻPMADL bit·ͨ͸PMADR bit͕ “1”ͷͱ͖ɺ
DACͷॳظԽαΠΫϧ͸͋Γ·ͤΜɻALC bit = “1”ͷ৔߹ɺॳظԽαΠΫϧத(1059/fs = 24ms
@fs=44.1kHz)ɺALC͸σΟηʔϒϧঢ়ଶ(ALCͷήΠϯ͸IVL/R7-0 bitsͷઃఆ)ͰɺॳظԽαΠΫϧ͕
ऴྃ͢ΔͱALC͸IVL/R7-0 bitsͷઃఆ͔Βಈ࡞Λ։࢝͠·͢ɻ
(11) εϐʔΧͷύϫʔηʔϒϞʔυͷղআ: SPPSN bit = “0” → “1”
(12) εϐʔΧͷύϫʔηʔϒϞʔυ΁Ҡߦ : SPPSN bit = “1” → “0”
(13) DAC Æ SPK-AmpͷύεͷDisable: DACS bit = “1” Æ “0”
(14) DAC, Beep-AmpͼٴεϐʔΧͷύϫʔμ΢ϯ: PMDAC = PMBP = PMSPK bits = “1” → “0”
MS0358-J-02
- 74 -
2005/04