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AK5701KN_17 Datasheet, PDF (23/64 Pages) Asahi Kasei Microsystems – PLL & MIC-AMP内蔵16-Bit Stereo ADC | |||
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[AK5701]
EXLRCK or EXBCLKããå
¥åã®å ´åã¯ãFS3, FS2 bitã§ãµã³ããªã³ã°å¨æ³¢æ°ã®è¨å®ãè¡ã£ã¦ä¸ãã(Table 6)ã
Mode FS3 bit FS2 bit
FS1 bit
FS0 bit Sampling Frequency Range
0
0
0
x
x
7.35kHz ï£ fs ï£ 12kHz
1
0
1
x
x
12kHz < fs ï£ 24kHz
2
1
x
x
x
24kHz < fs ï£ 48kHz (default)
Others
Others
N/A
(x: Donât care, N/A: Not available)
Table 6. Setting of Sampling Frequency at PMPLL bit = â1â and Reference=EXLRCK/EXBCLK
â PLLã®ã¢ã³ããã¯ã«ã¤ãã¦
1) PLL Master Mode (PMPLL bit = â1â, M/S bit = â1â)
ãã®ã¢ã¼ã㧠PMPLL bit = â0â ï â1âã«ããå¾PLLãããã¯ããã¾ã§ã®éãBCLKã¨LRCK㯠âLâãåºåãMCKO
bit = â1âã®ã¨ãMCKO pinããã¯æ£å¸¸ã§ãªãå¨æ³¢æ°ã®ã¯ããã¯ãåºåããã¾ããMCKO bit = â0âã®å ´åã¯ã
MCKO pin㯠âLâãåºåãã¾ãã(Table 7)
DSP Mode 0, 1ã«ããã¦ãPMPLL bit = â0â ï â1âè¨å®ã«ããPLLãããã¯ããå¾ãBCLKã¨LRCKã¯Lchã®ãã¼
ã¿ã«å¯¾å¿ãã¦åºåãéå§ãã¾ããDSP Mode 0, 1ã§MSBS bit = â0â, BCKP bit = â1âã¾ãã¯MSBS bit = â1â, BCKP bit
= â0âã®å ´åãBCLKåºåéå§ã®1çºç®ã® âHâå¹
ã2çºç®ä»¥éã«æ¯ã¹ã¦1/(256fs)ã ãçããªãã¾ãã
ãµã³ããªã³ã°å¨æ³¢æ°ãå¤æ´ããå ´åã¯ä¸åº¦PMPLL bit = â0âã«ãããã¨ã§ã¢ã³ããã¯ç¶æ
ã®ä¸å®ãªBCLK,
LRCKãåºåãããã« âLâãåºåããããã¨ãã§ãã¾ãã
PLL State
MCKO pin
MCKO bit = â0â MCKO bit = â1â
BCLK pin
LRCK pin
PMPLL bit â0â ï â1âç´å¾
âLâ Output
ä¸å®
âLâ Output
âLâ Output
PLL Unlock æ(ä¸è¨ä»¥å¤)
âLâ Output
ä¸å®
ä¸å®
ä¸å®
PLL Lock æ
âLâ Output
See Table 9
See Table 10 1fs Output (Note 30)
Note 30. DSP Mode 1ã®ã¨ããLRCKã¯2fsã§ãã
Table 7. Clock Operation at PLL Master Mode (PMPLL bit = â1â, M/S bit = â1â)
2) PLL Slave Mode (PMPLL bit = â1â, M/S bit = â0â)
ãã®ã¢ã¼ãã§ã¯ PMPLL bit = â0â ï â1âã«ããå¾PLLãããã¯ããã¾ã§ã®éãMCKOããã¯æ£å¸¸ã§ãªãå¨æ³¢æ°
ã®ã¯ããã¯ãåºåããã¾ãããã®å¾ãPLLãããã¯ããã¨MCKO pinããTable 9ã§é¸æãããã¯ããã¯ãåºå
ããã¾ããä½ããPLLãã¢ã³ããã¯ã«ãªã£ãå ´åãADCããã¯æ£å¸¸ãªãã¼ã¿ãåºåããã¾ããã
PLL State
MCKO pin
MCKO bit = â0â MCKO bit = â1â
PMPLL bit â0â ï â1âç´å¾
PLL Unlock æ(ä¸è¨ä»¥å¤)
âLâ Output
âLâ Output
ä¸å®
ä¸å®
PLL Lock æ
âLâ Output
See Table 9
Table 8. Clock Operation at PLL Slave Mode (PMPLL bit = â1â, M/S bit = â0â)
MS0404-J-04
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2015/10
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