2.1 Watchdog not disabled

When entering SAM-BA monitor, even after a USB enumeration by a host or reception of a character on the UART ROM code console, the Dual Watchdog Timer is not disabled.

As a consequence, the chip resets after the watchdog timeout elapses. A typical value is 16 seconds.

Work Around

Before the timeout elapses, write the WDDIS bit in PS_WDT_MR to disable the Dual Watchdog Timer.

Affected Device Revisions

A0

A0-D1G

A0-D2G

A1

A1-D5M

A1-D1G

A1-D2G

A1-D4G

XX