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Pin Assignment
Pin #
Name
1
VCC_IN
2
GND
3
1PPS
4
BOOTSEL
5
TXA
6
RXA
7
GPIO1
8
VBAT
9
NRESET
10
NC
EM-318-02
Description
DC Supply Voltage input
Analog Ground
One Pulse per second output synchronized to GPS time. Not available in
trickle mode.
Boot mode – set high to program flash
Serial output for channel
Serial input for channel
GPS Fix status output
Backup voltage supply
This is the battery backup input that powers the SRAM and
RTC when main power is removed. Typical current draw is 15uA. Without an external
backup battery, the module/engine board will execute a cold star after every turn on.
To achieve the faster start-up offered by a hot or warm start, a battery backup must be
connected. The battery voltage should be between 2.0v and 5.0v.
must be kept "HIGH" for operation. From Vcc connect a 470 Ohm resistor in series
with a 3.2v Zener diode to Ground. Then, connect the VBAT input to Zener's cathode
to pull the input "HIGH".)
Reset Input (Active Low)
Not connect
Page 5 of 16
(NOTE:
Specifications are subject to be changed without notice.
Version 1.2.1
This pin
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