参数资料
型号: EVAL-ADAU1761Z
厂商: Analog Devices Inc
文件页数: 18/92页
文件大小: 0K
描述: BOARD EVAL FOR ADAU1761
标准包装: 1
系列: SigmaDSP®
主要目的: 音频编解码器
嵌入式: 是,DSP
已用 IC / 零件: ADAU1761
主要属性: 立体声,24 位,8 ~ 96 kHz 采样率,GUI 工具
次要属性: I²C 和 GPIO 接口,2 差分和 1 个立体声单端模拟输入和输出
已供物品: 2 个板,线缆,CD
产品目录页面: 776 (CN2011-ZH PDF)
相关产品: ADAU1761BCPZ-RL-ND - IC SIGMADSP CODEC PLL 32LFCSP
ADAU1761BCPZ-R7-ND - IC SIGMADSP CODEC PLL 32LFCSP
ADAU1761BCPZ-ND - IC SIGMADSP CODEC PLL 32LFCSP
ADAU1761
Rev. C | Page 25 of 92
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 ADAU1761
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 ADAU1761.
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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