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Clarification of LPC82x power-up ramp wait time erratum

Question asked by duaneallen on Apr 13, 2018
Latest reply on Apr 24, 2018 by Victor Jimenez

A new errata document has been published for the LPC82x (ES_LPC82x Rev 1.3). Section 3.5 VDD.1 of that document states:


On the LPC82x, the VDD supply voltage range is from 1.8 V to 3.6 V. The LPC82x
datasheet specifies a power-up ramp condition for the user application. Before ramping
up, the minimum wait time (twait) of the power supply on the VDD pin (200 mV or below) is
12 us.
The device might not always start-up if the minimum wait time (twait) is 12 us. The required
minimum time (twait) specification is 2 ms.


It is unclear as to what this actually means, and what if any measures need to be taken to ensure proper startup of the microcontroller; reviewing the part's datasheet did not contribute anything that aided in understanding of the wait time requirement. Could someone provide a clearer and more detailed explanation of this, please?