參數(shù)資料
型號: AK4648EC
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: Stereo CODEC with MIC/HP/SPK-AMP
中文描述: 立體聲編解碼器麥克風(fēng)/惠普/胰腎聯(lián)合移植腺苷
文件頁數(shù): 105/119頁
文件大?。?/td> 1272K
代理商: AK4648EC
[AK4648]
MS0625-E-01
2007/06
- 105 -
3.
PLL Slave Mode (MCKI pin)
BICK pin
LRCK pin
MCKO bit
(Addr:01H, D1)
PMPLL bit
(Addr:01H, D0)
(1)
Power Supply
PDN pin
PMVCM bit
(Addr:00H, D6)
(2)
(3)
MCKI pin
(5)
(4)
Input
MCKO pin
Output
(6)
(7)
40msec(max)
(8)
Input
Example:
Audio I/F Format: MSB justified (ADC & DAC)
BICK frequency at Master Mode: 64fs
Input Master Clock Select at PLL Mode: 11.2896MHz
MCKO: Enable
Sampling Frequency: 44.1kHz
(1) Power Supply & PDN pin = “L”
“H”
(3)Addr:00H, Data:40H
(2)Addr:04H, Data:4AH
Addr:05H, Data:27H
(4)Addr:01H, Data:03H
MCKO output start
BICK and LRCK input start
Figure 73. Clock Set Up Sequence (3)
<Example>
(1)
After Power Up, PDN pin = “L”
“H”. “L” time of 150ns or more is needed to reset the AK4648.
The AK4648 should be operated as the recommended power-up/down sequence shown in “System Design
(Grounding and Power Supply Decoupling)” to avoid the pop noise at the speaker output, lineout output, and
headphone output.
(2)
DIF1-0, PLL3-0 and FS3-0 bits should be set during this period.
(3)
Power Up VCOM: PMVCM bit = “0”
“1”
VCOM should first be powered up before the other block operates.
(4)
Enable MCKO output: MCKO bit = “1”
(5)
PLL starts after that the PMPLL bit changes from “0” to “1” and PLL reference clock (MCKI pin) is supplied.
PLL lock time is 40ms(max.).
(6)
The normal clock is output from MCKO during this period.
(7)
The invalid frequency is output from MCKO after PLL is locked.
(8)
BICK and LRCK clocks should be synchronized with MCKO clock.
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