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When the module is in Hibernate state, the antenna bias can be switched off externally by using
WAKEUP signal output to switch off VDD_ANT supply, see e.g. Application Circuit Diagram.
2.2.7
Time Mark TM
The TM output signal provides pulse-per-second (1PPS) output pulse signal for timing purposes.Pulse
length (high state) is 200ms about 1us accuracy synchronized at rising edge to full UTC second.The
firmware may support optionally other output functions from TM signal, like GPS_ON output for e.g.
external LNA power control or RTC_CLK, which outputs buffered RTC clock signal at 32768 Hz;
contact FIBOCOM support for details.
2.2.8
ECLK
The ECLK is reserved for external clock input with special variant for A-GPS frequency aiding.The input
is suggested to be connected to GND when not used.
TSYNC
2.2.9
TSYNC input is reserved for external time aiding with a special variant used for A-GPS. The input is
suggested to be connected to GND when not used.
2.3
HW Information
2.3.1
Pin Assignment
No.
1
2
3
4
5
6
GTS-4E GPS Module Hardware Integration Manual
Name
I/O
RESERVE
SS_N
I
TIMEPULSE
O
ON/OFF
I
ECLK
I
TSYNC
I
Description
Do not connect
SPI Slave Select
Time pulse (1PPS)
External ON/OFF Signal
ECLK clock input for frequency
aiding applications
TSYNC is the time transfer strobe
input used in AGPS precise time
aiding. Edges on this pin latch
ACQCLK counter values, this
helps message data to transfer
time information between
Page 12 of 22
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