Editing Watchdog timer (section)

===Single-stage watchdog===
Watchdog timers come in many configurations, and many allow their configurations to be altered. For example, the watchdog and CPU may share a common [[clock signal]] as shown in the block diagram below, or they may have independent clock signals or in some cases the watchdog may have no clock signal at all. A basic watchdog timer has a single timer which, upon timeout, typically will reset the CPU:

[[File:SimpleWatchdogTimer.gif|300px|center|alt=Block diagram of a simple, single-stage watchdog timer. The common clock is characteristic of basic watchdog microcontrollers.]]