Onboard monitoring of voltage levels and droop events

A processor [100] includes a plurality of voltage droop detectors [130] positioned at multiple points of the processor. The detectors monitor voltage levels and alerts the processor if a droop event has been detected in real time. Multiple droops can be detected simultaneously, with each detected droop event generating an alert that is sent to a processor module, such as a clock control module, toact based on the detected droop. Each detector employs a ring oscillator [206] that generates a periodic signal and a corresponding count based on that signal, wherein the frequency of the signal varies based on a voltage at the corresponding point being monitored. 一种处理器[100]包括定位在所述处理器的多个点处的多个电压下垂检测器[130]。所述检测器监测电压电平，并且在已实时检测到下垂事件的情况下警示所述处理器。可同时检测到多个下垂，其中每个检测到的下垂事件生成警示，所述警示被发送到诸如时钟控制模块的处理器模块以基于所检测到的下垂而行动。每个检测器采用环形振荡器[206]，所述环形振荡器生成周期信号和基于该信号的对应计数，其中所述信号的频率基于所监测的对应点处的电压而变化。