GPS SiRFstarIV Evaluation Kit EVA2200-A for GPS Receiver Module A2200-A User Guide
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8 Shutdown Sequence
Care must be taken to implement an orderly shutdown sequence along with sup-
plying power for a certain period of time after initiating the shutdown sequence. Ab-
rupt removal or drop of power while the module is running has risks ranging from
minor impact on TTFF to fatal, permanent corruption of flash memory code area!
The shutdown sequence can either be initiated by a command (NMEA or binary) or
by toggling the ON_OF
F pin. It is strongly recommended to press the “ON” button
before removing power from the evaluation board!
The shutdown is completed after maximum 1s. Therefore the module should be at
least supplied with voltage for that time after the shutdown sequence was initiated. In
case the voltage supply will be available then continuously, it is necessary to wake up
the GPS module again by toggling the ON_OFF pin.
