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AK5701KN_17 Datasheet, PDF (57/64 Pages) Asahi Kasei Microsystems – PLL & MIC-AMP内蔵16-Bit Stereo ADC | |||
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[AK5701]
â ãã¤ã¯å
¥åé²é³(ã¹ãã¬ãª)
FS3-0 bits X,XXX
(Addr:15H, D3-0)
(1)
MIC Control
(Addr:12H, D4
& Addr:13H, D1-0)
Timer Control
(Addr:1AH)
ALC Control 1
(Addr:1BH)
ALC Control 2
(Addr:1CH)
0, 01
(2)
XXH
(3)
XXH
(4)
XXH
ALC State
ALC Disable
PMADL/R bit
(Addr:10H, D1-0)
ADC Internal
State
Power Down
1111
1, 01
0AH
E1H
81H
01H
(5)
(8)
ALC Enable ALC Disable
3088 / fs
(6)
(7)
Initialize Normal State Power Down
Example:
PLL Master Mode
Audio I/F Format:I2S
Sampling Frequency:44.1kHz
Pre MIC AMP:+15dB
MIC Power On
ALC setting:Refer to Figrure 37
ALC bit = â1â
(1) Addr:15H, Data:2FH
(2) Addr:12H, Data:10H
Addr:13H, Data:01H
(3) Addr:1AH, Data:0AH
(4) Addr:1BH, Data:E1H
(5) Addr:1CH, Data:81H
(6) Addr:10H, Data:07H
Recording
(7) Addr:10H, Data:04H
(8) Addr:1CH, Data:01H
Figure 52. MIC Input Recording Sequence
<æé ä¾>
fs=44.1kHzæã®ALCã®è¨å®ä¾ã§ããALCã®ãã©ã¡ã¼ã¿ãå¤æ´ããå ´åã¯ã âFigure 39. ALCåä½è¨å®æé
ä¾âãåç
§ãã¦ä¸ããã
ãã¯ããã¯ã®è¨å®ãã®é
ãåç
§ããã¯ããã¯ãä¾çµ¦ãã¦ä¸ããã
(1) ãµã³ããªã³ã°å¨æ³¢æ°(FS3-0 bits)ãè¨å®ãã¦ä¸ãããPLLã¢ã¼ãã®å ´åããµã³ããªã³ã°å¨æ³¢æ°ãå¤æ´ã
ã¦ããã®PLLããã¯æéãèæ
®ãã(6)ã®ãã¤ã¯åã³ADCã®ãã¯ã¼ã¢ãããè¡ã£ã¦ä¸ããã
(2) ãã¤ã¯å
¥å(ã¢ãã¬ã¹ 12H&13H)ã®è¨å®ã
(3) ALC Timer (ã¢ãã¬ã¹ 1AH)ã®è¨å®
(4) ALC REFå¤(ã¢ãã¬ã¹ 1BH)ã®è¨å®
(5) LMTH1-0, RGAIN1-0, LMAT1-0, ALC bitsã®è¨å®(ã¢ãã¬ã¹ 1CH)
(6) ãã¤ã¯åã³ADCã®ãã¯ã¼ã¢ãã : PMADL = PMADR bits = â0â ï® â1â
ADCã®åæåãµã¤ã¯ã«ã¯3088/fs=70.0ms@fs=44.1kHz, HPF1-0 bits = â00âã§ãã
ALCã¯å
¥åãã£ã¸ã¿ã«ããªã¥ã¼ã (IVL/R7-0 bits)ã®åæå¤(0dB)ããåä½ãéå§ãã¾ãã
100ms以å
ã§é²é³éå§ããã«ã¯PMVCM=PMMP bits = â1âè¨å®å¾2msã§PMPLL bit = â1âãè¨å®ãããã®
6mså¾ã«PMADL=PMADR bits = â1âãè¨å®ãã¦ä¸ããã
(7) ãã¤ã¯åã³ADCã®ãã¯ã¼ãã¦ã³: PMADL = PMADR bits = â1â ï® â0â
ãã¤ã¯åã³ADCããã¯ã¼ãã¦ã³ãããã¨ã§ALCãDisableç¶æ
ã«ãªãã¾ãããµã³ããªã³ã°å¨æ³¢æ°ãå¤
æ´ããALCã®è¨å®ãå¤æ´ããå ´åã¯ãããã¥ã¢ã«ã¢ã¼ã(ALC bit = â0â) ãããã¯ãã¤ã¯åã³ADCãã
ã¯ã¼ãã¦ã³(PMADL = PMADR bits = â0â)ãã¦ããè¡ã£ã¦ä¸ãããã¾ããPMADL = PMADR bits = â0â
ã®ã¨ããå
¥åãã£ã¸ã¿ã«ããªã¥ã¼ã (IVL/R7-0 bits)ã®ã²ã¤ã³ã¯ãªã»ãããããã次ã®ãã¯ã¼ã¢ããæ
ã¯ã³ã³ããã¼ã«ã¬ã¸ã¹ã¿ã®è¨å®å¤ã§åä½ãéå§ãã¾ãã
(8) ALC Disable: ALC bit = â1â ï® â0â
MS0404-J-04
- 57 -
2015/10
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