User Manual

ThingMagic Nano User Guide 4
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The following table gives the Voltage and Current limits for all communication and control interfaces:
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.
18, 19 GND Signal Return Must connect all GND pins to ground as they
also serve to remove heat from the module.
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.
22-28 RFU Reserved Reserved for future use - leave unconnected.
29-36 GND Signal Return Must connect all GND pins to ground as they
also serve to remove heat from the module.
39 RF RF Transmit and
Receive
Interface to antenna.
37, 38, 40, 41 GND RF Ground Must connect all GND pins to ground as they
also serve to remove heat from the module.
Voltage and Current Limits
Specification Limits
Input Low-level Voltage 1.0 V max to indicate low state; no lower than 0.3 V below ground to
prevent damage
Input High-level Voltage 1.9 V min to indicate high state; 3.7 V max when module is powered
up, no more than 0.3 V higher than Volt when module is turned off to
prevent damage.
ThingMagic Nano Digital Connector Signal Definition
Edge Via Pin # Signal
Signal Direction
(In/Out of
ThingMagic
Nano)
Notes