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Hardware Watchdog (PDL_HWWDG) | Cypress Semiconductor

Hardware Watchdog (PDL_HWWDG)

2018 年 2 月 27 日
  • Detect and reset runaway applications
  • Configurable timeout period
  • Watchdog "feed" function to reset the counter
  • Automatic stop/re-start in standby mode
Hardware_Watchdog_Symbol Diagram


The Hardware Watchdog is a 32-bit down counter that generates an interrupt, and optional reset, when the timer expires. The counter can be fed by a normally-functioning application to reset the counter and avoid the interrupt/reset. This enables the forced reset of a runaway application (one that fails to feed the watchdog).

The watchdog is clocked from the built-in low-speed CR oscillator (CLKLC) which enables the safe use of standby mode in your application. The counter automatically stops in the low power state and re-starts when the device wakes up.

HWWDG Component Parameter Editor

HWWDG Component Parameter Editor