參數資料
型號: AK4640
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: 16BIT CODEC WITH MIC /HP/SPK-AMPl
中文描述: 16位編解碼器麥克風/惠普/胰腎聯(lián)合移植,AMPl
文件頁數: 71/76頁
文件大小: 634K
代理商: AK4640
ASAHI KASEI
[AK4640]
MS0273-E-00
2004/03
- 71 -
Stop of Clock
MCKI can be stopped when PMMIC=PMADC=PMDAC=PMSPK= “0”.
1. When X’tal is used in PLL mode
MCKPD bit
(Addr:01H, D7)
PMXTL bit
(Addr:01H, D6)
PMPLL bit
(Addr:01H, D5)
MCKO bit
(Addr:03H, D4)
(1)
(2)
Exam ple :
Audio I/F Form at : I
2
S
BICK frequency at Master Mode : 64fs
Input Master Clock Select at PLL Mode : 11.2896MHz
(1) Addr:04H, Data:62H
(2) Addr:01H, Data:80H
Figure 53. Stop of Clock Sequence(1)
<Example>
(1) Disable MCKO output : MCKO bit = “1”
“0”
(2) Power down X’tal and PLL, Pull down the XTI pin :
PMXTL bit = PMPLL bit = “1”
“0”, MCKPD = “0”
“1”
2. When an external clock is used in PLL mode
MCKPD bit
(Addr:01H, D7)
External MCLK
PMPLL bit
(Addr:01H, D5)
MCKO bit
(Addr:03H, D4)
Input
(1)
(2)
(3)
Exam ple :
Audio I/F : I
2
S
BICK frequency at Master Mode : 64fs
Output Master Clock Frequency : 64fs
(1) Addr:04H, Data:62H
(2) Addr:01H, Data:80H
(3) Stop external clock
Figure 54. Stop of Clock Sequence(2)
<Example>
(1) Stop MCKO output : MCKO bit = “1”
“0”
(2) Power down PLL, Pull down the XTI pin : PMPLL bit = “1”
“0”, MCKPD = “0”
“1”
When the external MCKI becomes Hi-Z or the external MCKI is input by AC couple, MCKI pin should be
pulled down.
(3) Stop an external MCKI
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