Description

The initial write to the HIBCTL register may not occur if the Hibernation module is reset. The WRC bit in the HIBCTL register may not be set.

Workaround

After a Hibernation module reset, check to see if the WRC bit is set and perform the following:

• If the WRC bit is not set within the maximum oscillator startup time, perform a software reset of the Hibernation module and retry the HIBCTL write. The maximum oscillator startup time is given by the Hibernation XOSC startup time parameter, TSTART, in the Hibernation External Oscillator (XOSC) Input Characteristics table in the Electrical Characteristics chapter of the data sheet.
• If the WRC bit is set but the HIBCTL write was not successful, retry the HIBCTL write.