- Hadron
mini
Technical Information Manual
12
3
HARDWARE INTERFACE
Introduction
An example Hadron
mini
R1271C system-level block diagram for an embedded system is shown in
Hadronmini R1271C - Example of Block
Diagram. This figure shows the electrical connections that may and
must be made to control the Hadron
mini
R1271C. In the figure, the required connections are illustrated with
solid lines. Recommended and optional connections are illustrated with different dotted and dashed line
patterns. More details for each connection are listed in the following paragraphs.
Fig. 3.1: Hadron
mini
R1271C - Example of Block Diagram
Required connections:
•
VDC_IN and GND are required to power the Hadron
mini
R1271C.
•
RF is required to connect to the UHF RFID antenna.
•
UART1 Tx and Rx are required to communicate with the system host.
Recommended connections:
•
nRST is used to reset the Hadron
mini
R1271C if UART communication is not available. This connection is
highly recommended. This pin is internally driven strong low during software resets, so it should only
be driven externally by an open drain signal. It must not be driven strong high.
•
UART2 Tx and Rx may be used to examine debug information. Their behavior is defined in the
debugging section of the IRI SDK user documentation.
•
HEALTH indicates successful operation of the Hadron
mini
R1271C. Connection to a LED provides a
visual indication of whether or not an error condition exists.
•
STATUS provides an indication when the Hadron
mini
R1271C is in active mode (for example,
inventorying tags). Connection to a LED provides a visual indicator of the device’s activity.
