参数资料
型号: ADAU1461WBCPZ-RL
厂商: Analog Devices Inc
文件页数: 16/88页
文件大小: 0K
描述: IC SIGMADSP 24BIT 96KHZ PLL 32
标准包装: 5,000
系列: SigmaDSP®
类型: 音频处理器
应用: 车载音频
安装类型: 表面贴装
封装/外壳: 32-VFQFN 裸露焊盘,CSP
供应商设备封装: 32-LFCSP-VQ
包装: 带卷 (TR)
ADAU1461
Rev. 0 | Page 23 of 88
Case 2: PLL Is Used
The core clock to the entire chip is off during the PLL lock
acquisition period. The user can poll the lock bit to determine
when the PLL has locked. After lock is acquired, the ADAU1461
can be started by asserting the core clock enable bit (COREN)
in Register R0 (clock control register, Address 0x4000). This bit
enables the core clock to all the internal blocks of the ADAU1461.
PLL Lock Acquisition
During the lock acquisition period, only Register R0 (Address
0x4000) and Register R1 (Address 0x4002) are accessible
through the control port. Because all other registers require a
valid master clock for reading and writing, do not attempt to
access any other register. Any read or write is prohibited until
the core clock enable bit (COREN) and the lock bit are both
asserted.
To program the PLL during initialization or reconfiguration of
the clock setting, the following procedure must be followed:
1.
Power down the PLL.
2.
Reset the PLL control register.
3.
Start the PLL.
4.
Poll the lock bit.
5.
Assert the core clock enable bit after the PLL lock
is acquired.
The PLL control register (Register R1, Address 0x4002) is a
48-bit register where all bits must be written with a single
continuous write to the control port.
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