集成电路与嵌入式系统2025，Vol.25Issue(4)：60-65,6.DOI:10.20193/j.ices2097-4191.2024.0065
基于LMK04828的跨板级联时钟同步
Cross-board cascade clock synchronization based on LMK04828
王超 1胡劲涵 1张志福 1陈文涛1
作者信息
- 1. 中国电子科技集团公司第58研究所,无锡 214035
- 折叠
摘要
Abstract
The article is based on the LMK04828 high-performance clock chip,combined with the multi-board cascade clock multi-channel JESD204B synchronous sampling application scenario.It analyzes the impact of the division factor on the phase certainty of the clock output from two directions:the divider and the phase-locked loop.On this basis,a cross-board cascade clock synchronization verification system is designed,and the system is explained in terms of mode configuration precautions,the second-level phase-locked loop divider coefficient conditions,and timing constraints between the SYNC signal and SYSREF.A specific synchronization control process is pro-vided.Finally,through repeated power-up and resynchronization experiments,as well as experiments of repeatedly triggering the SYS-REF pulse output after a single power-up,it is confirmed that the phase relationship of the clock output from the cross-board cascade clock chip remains unchanged,verifying the effectiveness of the synchronization scheme and phase certainty.关键词
LMK04828/跨板级联时钟/时钟同步/确定性相位Key words
LMK04828/cross-board cascade clock/clock synchronization/deterministic phase分类
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王超,胡劲涵,张志福,陈文涛..基于LMK04828的跨板级联时钟同步[J].集成电路与嵌入式系统,2025,25(4):60-65,6.
