RCC->CFGR0 |=(uint32_t)RCC_SW_PLL;/*Wait till PLL is used as system clock source*/while((RCC->CFGR0 & (uint32_t)RCC_SWS) != (uint32_t)0x08) { } }else{/** If HSE fails to start-up, the application will have wrong clock * configuration. User can add here some code to...
#include"bsp_clkconfig.h"voidUser_SetSysClock(void){/***//* PLL (clocked by HSE) used as System clock source *//***/__IOuint32_tStartUpCounter =0, HSEStatus =0;/* 复位RCC的所有寄存器 */RCC_DeInit();/* Enable HSE *//* ...
SYSPLLCON1.K2DIV寄存器在上一次写入仍在进行时被锁定,如 SYSPLLSTAT.K2RDY =0 所示。 System PLL Lock Detection 系统PLL 具有锁定检测(lockdetection)功能,用于监控系统 PLL 的 DCO 部分,以区分稳定和不稳定的 DCO 电路行为。如果两个输入fREF 和fDIV的差异太大,锁定探测器(lock detector)会将 DCO 电路标记...
In a first embodiment the phase looked loop includes a counter which is incremented by a local device system clock and latched by a frame synchronisation marker received from a remote device. The counter output is calibrated 130 and 140, for example, by comparing to an expected count, averaged...
PLL 美 英 n.锁相环路;多聚L-赖氨酸 网络锁相环(phase-locked loop);锁相回路;锁相环电路 英汉 网络释义 n. 1. 锁相环路 2. 多聚L-赖氨酸 释义: 全部,锁相环路,锁相回路,锁相环电路
ADI’s industry leading phase locked loop (PLL) synthesizer family features a wide variety of high performance, low jitter clock generation and distribution devices. The extensive, ever growing phase l
NRZ Signal Decoding the NRZ encoded bitstream Clock Recovery System 参考 数字通信中,消息常被编码为比特流发送,因此接收端总会遇到比特流时钟恢复的问题;时钟恢复是指重新建立发送端编码比特流与时钟信号的关系,例如,进行PMA层进行NRZ编码后,时间信息被隐藏,因为时钟信号会占用带宽并且不带有有效消息;一般电路设计中...
SYSTEM_SYNCHRONOUS attempts to compensate all clock delay while SOURCE_SYNCHRONOUS is used when a clock is provided with data and thus phased with the clock. 指定输入时钟的PLL相位补偿。 SYSTEM_SYNCHRONOUS尝试补偿所有时钟延迟,而当时钟被提供数据并因此与时钟定相时,使用SOURCE_SYNCHRONOUS。
As such, it can be used with a high quality voltage controlled crystal oscillator (VCXO) and a narrow low-pass filter to clean up a noisy REFIN clock. Figure. 1 Basic PLL configuration. Figure 2. Basic PLL configuration. Phase Frequency Detector Figure 3. Phase frequency detector. The ...
The frequency dividers in this system can also increase the input frequency as high as the system capacity allows. This is the principle used in the TI Audio Devices Clocking Scheme. 3 PLL and Clocks Distribution Tree in Audio Devices In general terms, an audio device requires of a clock ...