- Lepton
7
x1 - Lepton
7
x4 - Technical Information Manual
11
3
HARDWARE INTERFACE
Introduction
An example R7101C Lepton
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x1/R7104C Lepton
7
x4 system-level block diagram for an embedded system is
shown in
Fig. 3.1: Lepton7x1 R7101C/Lepton7x4 R7104C - Example
of Block Diagram. This figure shows the
electrical connections that may and must be made to control the R7101C Lepton
7
x1/R7104C Lepton
7
x4. 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: Lepton
7
x1 R7101C/Lepton
7
x4 R7104C - Example of Block Diagram
Required connections:
•
VDC_IN and GND are required to power the R7101C Lepton
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x1/R7104C Lepton
7
x4.
•
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 R7101C Lepton
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x1/R7104C Lepton
7
x4 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.
•
TST and BSL_SEL shall be used for the FW recovery/upgrade procedure.
In order to start the Boot Strap Loader of Lepton
7
internal microcontroller NRST, TST and BSL_SEL
signals shall be driven as in the picture below:
