CN105320211B - 一种考虑时钟停振情况的无毛刺切换时钟管理电路 - Google Patents
一种考虑时钟停振情况的无毛刺切换时钟管理电路 Download PDFInfo
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- CN105320211B CN105320211B CN201510753083.6A CN201510753083A CN105320211B CN 105320211 B CN105320211 B CN 105320211B CN 201510753083 A CN201510753083 A CN 201510753083A CN 105320211 B CN105320211 B CN 105320211B
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- Prior art keywords
- clock
- oscillation stop
- oscillation
- hclk
- switching circuit
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- Oscillators With Electromechanical Resonators (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
Description
PIN | 方向 | 说明 |
lclk | input | LRC时钟输入 |
hclk | input | 其他高频时钟输入,要求hclk时钟频率大于LRC时钟 |
wdt_rst_n | output | 高频时钟watch dog复位信号,低电平有效 |
PIN | 方向 | 说明 |
clk_a | input | a时钟输入 |
clk_b | input | b时钟输入 |
select | input | 时钟选择信号,0‐clk_b;1‐clk_a |
reset_n | input | 复位信号,复位后选择clk_a,低有效,可以不使用 |
out_clk | output | 时钟输出 |
PIN | 方向 | 说明 |
lrc_clk | input | 低频RC时钟输入 |
osc_clk | input | 晶振时钟输入 |
pll_clk | input | PLL时钟输入 |
other_clk | input | 其他时钟输入 |
clk_sel[2:0] | input | 时钟选择信号 |
clk_o | output | 时钟输出 |
clk_sel | 选通时钟 |
3’b000 | lrc_clk |
3’b001 | osc_clk |
3’b01X | pll_clk |
3’b1XX | other_clk |
Claims (1)
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CN201510753083.6A CN105320211B (zh) | 2015-11-06 | 2015-11-06 | 一种考虑时钟停振情况的无毛刺切换时钟管理电路 |
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CN201510753083.6A CN105320211B (zh) | 2015-11-06 | 2015-11-06 | 一种考虑时钟停振情况的无毛刺切换时钟管理电路 |
Publications (2)
Publication Number | Publication Date |
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CN105320211A CN105320211A (zh) | 2016-02-10 |
CN105320211B true CN105320211B (zh) | 2022-06-03 |
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Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109412581A (zh) * | 2017-08-18 | 2019-03-01 | 杭州晶华微电子有限公司 | 一种时钟停振检测电路 |
CN112241190B (zh) * | 2019-07-19 | 2022-01-14 | 成都锐成芯微科技股份有限公司 | 一种中高频晶体驱动电路 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102857222A (zh) * | 2012-07-03 | 2013-01-02 | 山东华芯半导体有限公司 | 一种系统时钟的动态调整方法和电路 |
CN103197728A (zh) * | 2012-01-06 | 2013-07-10 | 上海华虹集成电路有限责任公司 | 不同时钟域无毛刺时钟切换电路的实现方法及电路 |
CN104834581A (zh) * | 2015-05-11 | 2015-08-12 | 江苏宏云技术有限公司 | 一种晶体振荡器的停振监测电路 |
CN204613809U (zh) * | 2015-05-22 | 2015-09-02 | 中国航天科技集团公司第九研究院第七七一研究所 | 一种无毛刺的时钟切换电路 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7053675B2 (en) * | 2003-07-25 | 2006-05-30 | Arm Limited | Switching between clocks in data processing |
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2015
- 2015-11-06 CN CN201510753083.6A patent/CN105320211B/zh active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103197728A (zh) * | 2012-01-06 | 2013-07-10 | 上海华虹集成电路有限责任公司 | 不同时钟域无毛刺时钟切换电路的实现方法及电路 |
CN102857222A (zh) * | 2012-07-03 | 2013-01-02 | 山东华芯半导体有限公司 | 一种系统时钟的动态调整方法和电路 |
CN104834581A (zh) * | 2015-05-11 | 2015-08-12 | 江苏宏云技术有限公司 | 一种晶体振荡器的停振监测电路 |
CN204613809U (zh) * | 2015-05-22 | 2015-09-02 | 中国航天科技集团公司第九研究院第七七一研究所 | 一种无毛刺的时钟切换电路 |
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