asked by
What does the HRST pin on M20050 really do?
After resetting and un-resetting (pin 10, HRST of M20050), the M20050 comes back on line with it's previous settings (rather than power up default settings).  The data sheet doesn't address what the real behavior is.  The M20050 HRST (pin 10) seems to be more of a sleep mode pin.   Is there any further information on what this pin really does?

Please log in or register to answer this question.

1 Answer

answered by
Hi , The HRST pin is used to restart the module. this forces a volatile RAM data loss. However the Non-volatile backup RAM content is not cleared and can still provide a fast TTFF.

to reset the module to a default configuration you can use PMTK command 104 (PMTK_CMD_FULL_COLD_START).

Meet the moderators

Nansen Tsai

Engineering Manager Nansen has a wealth of technical RF and wireless knowledge, with particular expertise in RF development and problem-solving.

Geoff Schulteis

Senior Antenna Apps Specialist at Antenova Geoff is an antenna design-in and OTA measurement specialist. His knowledge of FCC and world carrier requirements is second-to-none.

Steve Bradburn

Senior Antenna Engineer at Antenova With over 25 years’ experience in manufacturing, test and design, Steve has a wealth of RF and measurement knowledge across many industry sectors.


Antennas: The Comparison Guide

Find the perfect antenna for your project