User Manual
ThingMagic Nano User Guide 24
www.JADAKtech.com
The UART RX and UART TX lines are buffered on the Nano Carrier Board. This makes the inputs 5V
tolerant and increases the output current driving capability from 10 mA to 15 mA. Diodes are also added on
all I/O lines to increase the ESD protection.
The buffer on the Nano Carrier Board is driven by the Volt pin on the ThingMagic Nano. The current
supplied to this buffer will count toward the 1A total current that the ThingMagic Nano can draw from its
power source, potentially requiring slightly higher input voltage levels to achieve the highest RF output
levels.
The following page provides a schematic diagram for the Nano Carrier Board. Contact us at rfid-
support@jadaktech.com to obtain this in a PDF file.
14 ENABLE Input Internally Pulled high, in ENABLE state,
if not connected
15 Unused
Caution: The RX input line and all GPIO lines configured as inputs must be low when the
module is turned off and low just before the module is turned on. The RX input line
can be assured to be in a safe state if it is driven by a buffer circuit that is powered
by the Nano module as shown in the Nano carrier board design. That way, the input
Voltage to the RX pin can never be higher than the DC supply voltage into the Nano
module because the buffer is powered by the Nano module.
Caution: The following carrier board schematic diagram contains references to interfaces that
may or may not be implemented in the future (SPi, USB, etc.). Please refer to Digital/
Power Interfaces for information about which interfaces are currently supported.
Pin Definitions
Pin Number Signal
Signal Direction with
respect to
Carrier Board
Notes