发明授权
US5799178A System and method for starting and maintaining a central processing unit (CPU) clock using clock division emulation (CDE) during break events 失效
用于在中断事件期间使用时钟分频仿真(CDE)启动和维护中央处理单元(CPU)时钟的系统和方法

  • 专利标题: System and method for starting and maintaining a central processing unit (CPU) clock using clock division emulation (CDE) during break events
  • 专利标题(中): 用于在中断事件期间使用时钟分频仿真(CDE)启动和维护中央处理单元(CPU)时钟的系统和方法
  • 申请号: US634794
    申请日: 1996-04-19
  • 公开(公告)号: US5799178A
    公开(公告)日: 1998-08-25
  • 发明人: Gary WalkerMike CrewsJames Steele
  • 申请人: Gary WalkerMike CrewsJames Steele
  • 申请人地址: CA San Jose
  • 专利权人: VLSI Technology, Inc.
  • 当前专利权人: VLSI Technology, Inc.
  • 当前专利权人地址: CA San Jose
  • 主分类号: G06F1/14
  • IPC分类号: G06F1/14 G06F1/04
System and method for starting and maintaining a central processing unit
(CPU) clock using clock division emulation (CDE) during break events
摘要:
The present invention relates to a system and method for starting and maintaining a Central Processing Unit (CPU) clock even though the CPU clock is operating under a Clock Division Emulation (CDE) scheme. Break Events are broken into different groups with each group of Break Events being mapped to a particular programmable event timer. Each of the programmable event timers have an associated time limit which will keep the CPU clock running for a time commensurate with that group of Break Events. When a Break Event occurs, the programmable event timer associated with that particular Break Event will load the corresponding time limit into the programmable event timer. Once loaded, the programmable event timer will keep the CPU clock running during the entire time limit. Only after all of the programmable event timers have counted down will the CPU clock be allowed to stop.
公开/授权文献
信息查询
0/0