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AK4688EN Datasheet, PDF (17/36 Pages) Asahi Kasei Microsystems – Asynchronous Stereo CODEC with Capless Line I/O | |||
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[AK4688]
â ÏÎδλϧHPF
ADCã¯DCãªãã»ãããã£ã³ã»ã«ã®ããã«ãã£ã¸ã¿ã«HPFãå
èµãã¾ããHPFã®fcã¯ãfs=48kHzæ1Hzã«ãªã£ã¦
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ã®PORTã¯ç¬ç«ã®ãªã¼ãã£ãªã¤ã³ã¿ãã§ã¼ã¹ãã©ã¼ããããè¨å®ã§ãã¾ããPORT1ã¯DIF1 bitãPOTR2ã¯
DIF21-20 bitsã§è¨å®å¯è½ã§ããå
¨ã¢ã¼ãã¨ãMSBãã¡ã¼ã¹ãã2âs complimentã®ãã¼ã¿ãã©ã¼ãããã§ãSDTO
ã¯BICK1ã®ç«ã¡ä¸ããã§åºåãããSDTIã¯BICK2ã®ç«ã¡ä¸ããã§ã©ããããã¾ããSDTIã®å
¥åãã©ã¼ããã
ã§ãã¼ã¿ã®ãªãLSBã«ã¯ â0â ãå
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1. PORT1(ADC)Í·àªà°
MSN pin, DIF1 bit ã«ããä¸è¨4種é¡ã®ãã¼ã¿ãã©ã¼ããããé¸æã§ãã¾ãã(Table 17)
Mode
0
1
2
3
MSN
pin
L
L
H
H
DIF1
SDTO
LRCK1
BICK1
bit
L/R I/O speed I/O
0
24/16bit
Left Justified
H/L
I
⥠48fs or
32fs
I
1
24bit, I2S
L/H
I ⥠48fs I
0
24bit
Left Justified
H/L
O
64fs
O
1
24bit, I2S
L/H
O
64fs
O
Table 17. Audio Interface Format (ADC)
(default)
(default)
2. PORT2(DAC)Í·àªà°
DIF21-20 bit ã«ããä¸è¨4種é¡ã®ãã¼ã¿ãã©ã¼ããããé¸æã§ãã¾ãã(Table 18)
Mode
0
1
2
3
DIF21
bit
0
0
1
1
DIF20
bit
0
1
0
1
SDTI
LRCK2
L/R I/O
16bit, Right justified H/L
I
24bit, Right justified H/L
I
24bit, Left justified
H/L
I
24bit, I2S
L/H
I
Table 18. Audio Interface Format (DAC)
BICK2
speed I/O
⥠32fs I
⥠48fs I
⥠48fs I
⥠48fs I
(default)
MS1420-J-00
- 17 -
2012/05
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