參數(shù)資料
型號: AK4651VG
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: 16Bit ツヒ CODEC with MIC/HP/SPK-AMP
中文描述: 16位ツヒ編解碼器麥克風(fēng)/惠普/胰腎聯(lián)合移植腺苷
文件頁數(shù): 52/66頁
文件大?。?/td> 605K
代理商: AK4651VG
ASAHI KASEI
[AK4651]
MS0503-E-00
2006/04
- 52 -
Power On
Note that AK4651 must be in cold reset at power on and RESETN must be “L” until master crystal clock becomes stable,
or cold reset must be done once after master clock is stable.
BIT_CLK
Initialize Registers
start up crystal oscillation
SYNC=”L”
SDATA_OUT=”L”
RESET#
Vdd
T
rst2clk
Figure 40. Power On Timing
Cold Reset
Note that both SDATAOUT and SYNC must be “L” at the rising edge of RESETN for cold reset.
The AK4651 initializes all registers including the Power-down Control Registers, BIT-CLK is reactivated and each
analog output except for HP-Amp is in Hi-Z state while RESETN pin is “L”.
At the rising edge of RESETN, the AK4651 starts the initialization of ADC and DAC, which takes 1028TS cycles. After
that, the AK4651 is ready for normal operation. At that time, VRA bit is its default value (“0”). Therefore, fs=48kHz and
TS=1/fs=20.83
μ
s.
Status bit in the slot 0 is “0” (not ready) when the AK4651 is in RESET period (“L”) or in initialization process. After
initialization cycles, the status bit goes to “1” (ready).
Trst_low
BIT_CLK
VIL
RESET#
Trst2clk
SYNC= “L”
SDATA_OUT= “L”
Figure 41. Cold Reset Timing
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