Tyco Electronics A1082-A, Руководство пользователя

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GPS receiver A1082-A
10 Application and Hints
10.1 Enable PIN (P1.6)
The Enable PIN is an input PIN and low active.
The module will immediately switch to standby mode by pulling the Enable PIN to
“low”. The RTC keeps running and the internal SRAM will be back upped. This
keeps the Ephemeris and Almanac stored. Pulling the Enable PIN back to “high”
within 2 hours will end in hot start situation.
10.2 1PPS PIN
The 1PPS pin is an output pin.
In addition to precise positioning, GPS also allows for accurate timing due to the
synchronized atomic clocks in the GPS satellites. While the current date and time is
transmitted in NMEA sentences, an exact and accurate timing signal is provided via
the 1PPS pin of the A1082-A modules.
10.3 Standby PIN (P1.5)
The Standby pin is an input pin and high active.
Pulling Standby pin to high will activate trickle power mode with factory preset vari-
ables. Please see Firmware manual A1082-A.
10.4 FDOUT PIN
FDOUT Pin is an output pin.
FDOUT indicates active low power modes (trickle, standby). Typical application to use this
pin is to deactivate external LNA or active antenna to reduce power consumption to mini-
mum.
Page 24 of 27 User’s Manual V1.0 - 10/07