AXEL Lite SOM/AXEL Lite Hardware/Peripherals/Watchdog

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ID# Issue Date Notes


27/10/2020 New documentation layout

Peripheral Watchdog[edit | edit source]

The Watchdog Timer (WDOG) protects against system failures by providing a method by which to escape from unexpected events or programming errors.

Description[edit | edit source]

By default, the Watchdog Timer of iMX6 SOC is internally used on AXEL Lite for the CPU-initiated software reset function.

For more details see the reset scheme and control signals section.

The Watchdog timer supports the following features:

  • Configurable timeout counter with timeout periods from 0.5 to 128 seconds which, after timeout expiration, result in the assertion of WDOG_RESET_B_DEB reset signal
  • Time resolution of 0.5 seconds
  • Power down counter with fixed timeout period of 16 seconds, which if not disabled after reset will assert WDOG_B signal low

Pin mapping[edit | edit source]

The Pin mapping is described in the Pinout table section