User's Guide

ThingMagic M3e User Guide
9
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Edge Via Pin # Signal
Input/Ouput
Notes
1,5,9,18,19.29,33,
36,37,38,40,41
GND
Signal Return
Must connect all GND pins to ground as they
also serve to remove heat from the module.
10
Volt
DC Power Output
3.4V DC output. Maximum load 5 mA. Turns
off when ENABLE is pulled low.
Leave unconnected if not used.
11
Run
Enable/Shutdown
TTL input that turns the module off and
reduces its power consumption to nearly
zero.
Hi=Enable, Low=Shut down module.
If left unconnected, module will stay in
ENABLE state.
Edge Via Pin # Signal
Signal Direction
(In/Out of
ThingMagic
M3e)
Notes
12 GPIO1 Bidirectional
GPIO
Each line configurable as input or
output interface (by default it is an input
with internal pull-down).
13
GPIO2
Bidirectional
GPIO
14
GPIO3
Bidirectional
GPIO
15 GPIO4 Bidirectional
GPIO
16,17 Vin Power Supply
Input
3.3 to 5.5VDC.
Pins 16 and 17 are internally connected.
Connect DC power source to both pins to
ensure sufficient current carrying capacity.
20
UART_TX
Out
UART Serial output, 3.3V logic.
21 UART_RX In UART Serial input, 3.3V logic. Must be low
when module is powered on or off.
22 SPI_MISO Out SPI data pin. (Master-In, Slave-Out) -
Unsupported in Me3 Release 1
23
SPI_NSS
In
SPI Slave Select – active Low -
Unsupported in Me3 Release 1
24 SPI_CLK In SPI Serial Clock - Unsupported in Me3
Release 1
25
SPI_MOSI
In
SPI data pin. (Master-Out, Slave-In) -
Unsupported in Me3 Release 1
26
JTAG CLK
In
27 JTAG Data In/Out
28 RESETN Processor reset, active low pin