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AK5720VT Datasheet, PDF (16/25 Pages) HuaXinAn Electronics CO.,LTD – ADC | |||
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[AK5720]
â ã·ã¹ãã ã¯ããã¯
13. æ©è½èª¬æ
AK5720ã«å¿
è¦ã¨ãããã¯ããã¯ã¯MCLK, BICK, LRCKã§ããMCLKã¨LRCKã¯åæããå¿
è¦ã¯ããã¾ã
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è¦ã¯ããã¾ãããTable 1ã«æ¨æºã®ãªã¼ãã£ãªã¬ã¼ãã«å¯¾ãã¦AK5720ã«å¿
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ããåã¯ããã¯ã®å¨æ³¢æ°ã示ãã¾ããã¹ã¬ã¼ãã¢ã¼ãã§ã®åä½æ(PDN pin = âHâ)ã¯ãåå¤é¨ã¯ããã¯
(MCLK, BICK, LRCK)ãæ¢ãã¦ã¯ããã¾ãããã¯ããã¯ãæ¢ããå ´åã¯ãã¯ã¼ãã¦ã³ç¶æ
(PDN pin = âLâ)
ã«ãã¦ä¸ããããã¹ã¿ã¢ã¼ãã§ã¯ãã¯ã¼ãã¦ã³æ以å¤ã¯ãå¤é¨ã¯ããã¯(MCLK)ãä¾çµ¦ãã¦ä¸ããã
fs
32kHz
44.1kHz
48kHz
96kHz
MCLK
128fs
N/A
N/A
N/A
N/A
192fs
N/A
N/A
N/A
N/A
256fs
384fs
8.192MHz 12.288MHz
11.2896MHz 16.9344MHz
12.288MHz 18.432MHz
24.576MHz 36.864MHz
Table 1. System Clock Example
512fs
16.384MHz
22.5792MHz
24.576MHz
N/A
768fs
24.576MHz
33.8688MHz
36.864MHz
N/A
â ãªã¼ãã£ãªã¤ã³ã¿ãã§ã¼ã¹ãã©ã¼ããã
CKS pin (Table 2)ã«æ¥ç¶ããå¤ä»ãæµæã®å¤ã¨æ¥ç¶å
ã§ã¤ã³ã¿ã¼ãã§ã¼ã¹ã¢ã¼ããè¨å®ãã¾ããã¢ã¼ãæ¯ã«
MCLKå¨æ³¢æ°ããã³BICKå¨æ³¢æ°ã¨fsã®é¢ä¿ããã¹ã¿ã¢ã¼ããã¹ã¬ã¼ãã¢ã¼ããã決ã¾ãã¾ãã
CKS pinãç´æ¥ãããã¯å¤ä»ãæµæ4.7kïãä»ãã¦GNDã¾ãã¯VAã«æ¥ç¶ãããå ´å(Normal mode) ã
DIF/TDMI pinã¯ãªã¼ãã£ãªãã¼ã¿ãã©ã¼ãããé¸æãã³ã¨ãã¦æ©è½ãã24bitåè©°ãã¨I2Sãããã©ã¼ã
ãããé¸æã§ãã¾ã(Table 3)ããªã¼ãã£ãªãã¼ã¿ã¯BICKã®ç«ä¸ãã§SDTO pinã«åºåããã¾ãããªã¼ã
ã£ãªã¤ã³ã¿ãã§ã¼ã¹ã¯ãã¹ã¿ã¢ã¼ãã¨ã¹ã¬ã¼ãã¢ã¼ãã«å¯¾å¿ãã¾ãããã¹ã¿ã¢ã¼ãã§ã¯LRCKã¨BICK
ã¯åºåã«ãªããã¹ã¬ã¼ãã¢ã¼ãã§ã¯å
¥åã«ãªãã¾ãããã¹ã¿ã¢ã¼ãæã®LRCKå¨æ³¢æ°ã¨BICKå¨æ³¢æ°ã¯ã
ããã1fsã¨64fsã§ãã
CKS pinãå¤ä»ãæµæ18kïãããã¯82kïãä»ãã¦GNDã¾ãã¯VAã«æ¥ç¶ãããå ´å(TDM mode)ã
DIF/TDMI pinã¯TDMãã¼ã¿å
¥åãã³ã¨ãã¦æ©è½ãã¾ããTDM modeã®ã¨ããªã¼ãã£ãªãã¼ã¿ã¯BICKã®
ç«ã¡ä¸ããã§SDTO pinã«åºåããã¾ãããã®SDTOåºåãã¼ã¿ã¯èªèº«ã®TDMI pinã«å
¥åããã¨ãã«BICK
ã®ç«ã¡ä¸ããã«å¯¾ããã»ããã¢ããããã¼ã«ãæéãæºãããããªé
延ãæã¡ã¾ãã
Mode
CKS
DIF/TDMI SDTO Master/Slave
MCLK
BICK
0
< 10Ω to GND
1
(Short to GND)
2
< 10Ω to VA
3
4
Normal
5
(Short to VA)
4.7kΩ±10% to
GND
6
7
4.7kΩ±10% to VA
8
18kΩ±10% to GND
9 TDM 18 kΩ±10% to VA
10
82kΩ±10% to GND
11
82kΩ±10% to VA
L
MSB
H
I2S
Slave
L
H
MSB
I2S
Master
L
MSB
H
I2S
Master
L
H
MSB
I2S
Master
TDMI MSB Master
TDMI
TDMI
TDMI
MSB
I2S
I2S
Slave
Master
Slave
Table 2. Mode Select
256/384fs (8kï£fsï£96k)
512/768fs (8kï£fsï£48k)
ï³ 48fs or 32fs
256fs (8kï£fsï£96k)
64fs
384fs (8kï£fsï£96k)
64fs
512fs (8kï£fsï£48k)
256fs (8kï£fsï£96k)
256fs (8kï£fsï£96k)
256fs (8kï£fsï£96k)
256fs (8kï£fsï£96k)
64fs
256fs
256fs
256fs
256fs
Note 12. BICK = 32fså
¥åæã¯ãSDTOåºåã¯16bitåºåã¨ãªãã¾ãã
MS1641-J-00
- 15 -
2014/04
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