User`s manual

PRELIMINARY
V0.5 – Feb-11 User’s Manual Page 18 of 22
7 NMEA Port
• Default setting: 4800 baud, 8 data bits, no parity, 1 stop bit, no flow control!
• Standard NMEA-0183 output on NMEA, baud rate selectable.
• Standard USB connectors
8 EVA2100-A Firmware and NMEA Sentences
See separate document GPS Firmware for a detailed description of the standard
firmware loaded onto the modules delivered with the EVA2100.
9 Shut-Down Sequence
Care must be taken to implement an orderly shut-down sequence along with
supplying power for a certain period of time after initiating the shut-down sequence.
Abrupt removal or droop 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 shut-down sequence can either be initiated by a command (NMEA or binary) or
by toggling the ON_OFF 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.