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AK4688EN Datasheet, PDF (13/36 Pages) Asahi Kasei Microsystems – Asynchronous Stereo CODEC with Capless Line I/O | |||
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[AK4688]
â γεÏÏΫϩοΫ
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AK4688ã¯ãéåæã§åä½å¯è½ãªã·ãªã¢ã«ãªã¼ãã£ãªã¤ã³ã¿ãã§ã¼ã¹ã2å (PORT1, PORT2)æã¡ã¾ããPORT1
ã¯ADCç¨ãPORT2ã¯DACç¨ã®ãªã¼ãã£ãªã¤ã³ã¿ã¼ãã§ã¼ã¹ã§ããåã
ã®PORTã«ããã¦ãã¹ã¬ã¼ãã¢ã¼ãæ
ã«å¿
è¦ãªã¯ããã¯ã¯ãMCLK 1(MCLK2), LRCK1 (LRCK2), BICK1 (BICK2)ã§ããMCLK1 (MCLK2)ã¨LRCK1
(LRCK2)ã¯åã
PORTæ¯ã«åæããå¿
è¦ã¯ããã¾ãããä½ç¸ãåãããå¿
è¦ã¯ããã¾ããã
AK4688ã¯ADCç¨ã«PDN1 pin(or PWAD bit) ãDACç¨ã«PDN2 pin(or PWAD bit) ã§ã³ã³ããã¼ã«ãããã¯ã¼ãã¦
ã³æ©è½ãããããç¬ç«ã«æã£ã¦ãã¾ããI2Cã³ã³ããã¼ã«ã¢ã¼ãã®å ´åã¯ã PDN1 pin= PDN2 pin = âHâ and
PWAD bit = PWDA bit = â1â ã§åä½ç¶æ
ã«ãªã(Table 1, Table 3)ãH/Wã³ã³ããã¼ã«ã¢ã¼ãã®å ´åã¯ãPDN1 pin=
PDN2 pin = âHâã§åä½ç¶æ
ã«ãªãã¾ã(Table 2, Table 4)ãåä½ç¶æ
ã§ããã¹ã¿ã¢ã¼ãæ (MSN pin = âHâ)ã«MCLK1
ããã¹ã¬ã¼ãã¢ã¼ãæ(MSN pin = âLâ)ã«ãMCLK1 (MCLK2)ãLRCK1 (LRCK2)ãBICK1 (BICK2)ãåæ¢ããã¨
èªåçã«ãã¯ã¼ãã¦ã³ç¶æ
ã«ãªããADCåºå㯠â0â ãã¼ã¿ãDACåºåã¯Pull Down(VSS)ã«ãªãã¾ããã¾ãã
ãã¹ã¿ã¢ã¼ãæ (MSN pin = âHâ)ã«MCLK1ããã¹ã¬ã¼ãã¢ã¼ãæ(MSN pin = âLâ)ã¯ãMCLK1 (MCLK2)ãLRCK1
(LRCK2)ãBICK1 (BICK2)ãåå
¥åå¾ããã¯ã¼ãã¦ã³ç¶æ
ã解é¤ããåä½ãåéãã¾ãã
é»æºONçã®ãªã»ãã解é¤æ(PDN1 pin= âLâ â âHâ) ã¯MCLK1, LRCK1, BICK1 ãå
¥åãããã¾ã§ADCã¯ãã¯
ã¼ãã¦ã³ç¶æ
ã§ããé»æºONçã®ãªã»ãã解é¤æ(PDN2 pin= âLâ â âHâ) ã¯MCLK2, LRCK2, BICK2 ãå
¥åãã
ãã¾ã§DACã¯ãã¯ã¼ãã¦ã³ç¶æ
ã§ãã
PDN1 pin
PWAD bit
Master mode: MCLK1
Slave mode: MCLK1,LRCK1 and BICK1
ADC stauts ADC OUT
L
Ã
Ã
Power down
0
H
0
Ã
Power down
0
H
1
Non-active
Power down
0
H
1
active
Power up ADC output
(Ã: Donât Care)
Table 1. System CLOCK for ADC (I2Cã³ã³ããã¼ã«ã¢ã¼ããPORT1)
PDN1 pin
Master mode: MCLK1
Slave mode: MCLK1,LRCK1 and BICK1
ADC stauts
ADC OUT
L
Ã
Power down
0
H
Non-active
Power down
0
H
active
Power up ADC output
(Ã: Donât Care)
Table 2. System CLOCK for ADC (H/Wã³ã³ããã¼ã«ã¢ã¼ããPORT1)
PDN2 pin PWDA bit
MCLK2,LRCK2
and BICK2
DAC stauts
DAC OUT
L
Ã
Ã
Power down
VSS
H
0
Ã
Power down
VSS
H
1
Non-active
Power down
VSS
H
1
active
Power up
DAC output
(Ã: Donât Care)
Table 3. System CLOCK for DAC (I2Cã³ã³ããã¼ã«ã¢ã¼ããPORT2)
PDN2 pin
MCLK2,LRCK2
and BICK2
DAC stauts
DAC OUT
L
Ã
Power down
VSS
H
Non-active
Power down
VSS
H
active
Power up
DAC output
(Ã: Donât Care)
Table 4. System CLOCK for DAC (H/Wã³ã³ããã¼ã«ã¢ã¼ããPORT2)
MS1420-J-00
- 13 -
2012/05
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