caenrfid Lepton7 R7100C Technical document

TECHNICAL INFORMATION MANUAL
Revision 0.2 - 30/06/2022
R7100C
Lepton7
30dBm 1-Port RAIN RFID Reader Module

Visit the Lepton7R7100C web page, you will find the latest revision
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All you need to start using your reader in a few clicks!
Scope of Manual
The goal of this manual is to provide the basic information to work with the Lepton7R7100C Reader.
Change Document Record
Date
Revision
Changes
Pages
07/04/2022
0
Preliminary revision
-
19/05/2022
0.1
Added Federal Communications Commission (FCC) Notice
(Preliminary)
3
Added FCC Compliance paragraph in the Regulatory Compliance
chapter
21,22
30/06/2022
0.2
Corrected minimum separation distance requirement
21,22
Reference Document
[RD1] EPCglobal: EPC Radio-Frequency Identity Protocols Class-1 Generation-2 UHF RFID Protocol for
Communications at 860 MHz –960 MHz, Version 2.0.1 (April 2015).
CAEN RFID srl
Via Vetraia, 11 55049 Viareggio (LU) - ITALY
Tel. [phone] Fax [phone]
[email protected]
www.caenrfid.com
© CAEN RFID srl –2022
Disclaimer
No part of this manual may be reproduced in any form or by any means, electronic, mechanical, recording, or
otherwise, without the prior written permission of CAEN RFID.
The information contained herein has been carefully checked and is believed to be accurate; however, no
responsibility is assumed for inaccuracies. CAEN RFID reserves the right to modify its products specifications
without giving any notice; for up to date information please visit www.caenrfid.com.
Preliminary Product Information
This document contains information for a new product. CAEN RFID reserves the right to modify this product
without notice.
“Preliminary” product information describes products that are ready for production, but for which full
characterization data is not yet available. CAEN RFID believes that the information contained in this document is
accurate and reliable. However, the information is subject to change without notice and is provided “AS IS”
without warranty of any kind (Express or implied). You are advised to obtain the latest version of relevant
information to verify, before placing orders, that information being relied on is current and complete. All products
are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including
those pertaining to warranty, patent infringement, and limitation of liability. No responsibility is assumed by CAEN
RFID for the use of this information, including use of this information as the basis for manufacture or sale of any
items, or for infringement of patents or other rights of third parties.

Federal Communications Commission (FCC) Notice (Preliminary)
This device was tested and found to comply with the limits set forth in Part 15 of the FCC Rules. Operation is
subject to the following conditions: (1) this device may not cause harmful interference, and (2) this device must
accept any interference received including interference that may cause undesired operation. These limits are
designed to provide reasonable protection against harmful interference when the equipment is operated in a
commercial environment.
This device generates, uses, and can radiate radio frequency energy. If not installed and used in accordance with
the instruction manual, the product may cause harmful interference to radio communications. Operation of this
product in a residential area is likely to cause harmful interference, in which case, the user is required to correct
the interference at their own expense. The authority to operate this product is conditioned by the requirements
that no modifications be made to the equipment unless the changes or modifications are expressly approved by
CAEN RFID.
Disposal of the product
Do not dispose the product in municipal or household waste. Please check your local
regulations for disposal/recycle of electronic products.

INDEX - Lepton7- Technical Information Manual 4
Index
Scope of Manual ........................................................................................................................................................................2
Change Document Record .......................................................................................................................................................2
Reference Document.................................................................................................................................................................2
1Introduction......................................................................................................................................................................6
Description..................................................................................................................................................................................6
Reader ............................................................................................................................................................................6
2Technical Specifications ................................................................................................................................................7
Technical Specifications ...........................................................................................................................................................7
Key Features...............................................................................................................................................................................8
3Hardware Interface .........................................................................................................................................................9
Introduction.................................................................................................................................................................................9
Power Supply ...........................................................................................................................................................................10
RF Connection..........................................................................................................................................................................10
UART Communication.............................................................................................................................................................10
Reset Pin ...................................................................................................................................................................................11
GPIO Pins..................................................................................................................................................................................11
Wakeup Pin...............................................................................................................................................................................12
Pin Listing and Signal Definitions...........................................................................................................................................12
Electrical Specifications ..........................................................................................................................................................13
Absolute Maximum Ratings........................................................................................................................................13
Operating Conditions..................................................................................................................................................14
Device Functional Specifications ..............................................................................................................................14
UHF Gen 2 RFID Radio Specifications .....................................................................................................................15
Device Input and Output Specifications ...................................................................................................................15
4Layout and Components ..............................................................................................................................................17
Introduction...............................................................................................................................................................................17
PCB Layout for RF ...................................................................................................................................................................17
50 Ohm Characteristic Impedance ...........................................................................................................................17
Package and Assembly Information ......................................................................................................................................18
Package Mass..............................................................................................................................................................18
Package Dimensions...................................................................................................................................................18
PCB Footprint ..............................................................................................................................................................19
SMT Reflow Information .............................................................................................................................................19
Moisture Sensitive Level 3 (MSL 3) ..........................................................................................................................20
5Regulatory Compliance ................................................................................................................................................21
RoHS EU Directive...................................................................................................................................................................21
FCC Compliance......................................................................................................................................................................21

INDEX - Lepton7- Technical Information Manual 5
List of Figures
Fig. 1.1: Lepton7Reader –top view....................................................................................................................................................6
Fig. 1.2: Lepton7 Reader –back view ................................................................................................................................................6
Fig. 3.1: Lepton7R7100C - Example of Block Diagram....................................................................................................................9
Fig. 3.2: BSL sequence ......................................................................................................................................................................10
Fig. 3.3: Lepton7R7100C Pin Listing................................................................................................................................................12
Fig. 4.1: PCB Transmission Line Types............................................................................................................................................17
Fig. 4.2: Package Dimensions, Top, Front, and Side Views ..........................................................................................................18
Fig. 4.3: Recommended Etched Copper Footprint –All Pads.......................................................................................................19
Fig. 4.4: Recommended Solder Reflow Profile for the Lepton7R7100C .....................................................................................19
List of Tables
Tab. 2.1: Lepton7R7100C Technical Specifications ........................................................................................................................7
Tab. 3.1: Pin Listing and Signal Definitions......................................................................................................................................13
Tab. 3.2: Absolute Maximum Ratings ...............................................................................................................................................13
Tab. 3.3: Operating Conditions .........................................................................................................................................................14
Tab. 3.4: Supply Current Specifications ..........................................................................................................................................14
Tab. 3.5: Startup and Wakeup Time.................................................................................................................................................14
Tab. 3.6: RF Receiver Specifications................................................................................................................................................15
Tab. 3.7: RF Transmitter Specifications ...........................................................................................................................................15
Tab. 3.8: Digital Interface Specification............................................................................................................................................15
Tab. 3.9: Analog Interface Specification ..........................................................................................................................................16

INTRODUCTION - Lepton7- Technical Information Manual 6
1INTRODUCTION
Description
Reader
The Lepton7(Model R7100C), an embedded reader of the easy2read©product line, is an ultra compact reader
for low power, high performance RAIN RFID applications.
With programmable output power from 10dBm to 30dBm, the reader can detect tags at more than 5 mt of
distance (depending on antenna and tag dimensions).
Due to its low power consumption, the module is specifically designed to be easily integrated in battery
powered devices.
The radio frequency core of the module is based on the Impinj E710 IC that permits to achieve fast reading
speed and to be used in dense reader and dense tag environments for top-class rated performances.
The compactness of the device and the surface mount technology allow to embed the Lepton7inside the new
small form factor industrial handhelds, smartphone accessories and other compact form factor devices.
The Lepton7complies with and can operate in both European and US regulatory environments and, thanks to
its multiregional capabilities, it’s ideal for integration in devices requiring compliance to different geographical
regions.
The Lepton7is pin-to-pin compatible with the Impinj RS1000 and RS500 modules making it a perfect
replacement for these devices.
Fig. 1.1: Lepton7Reader –top view
Fig. 1.2: Lepton7 Reader –back view

TECHNICAL SPECIFICATIONS - Lepton7- Technical Information Manual 7
2TECHNICAL SPECIFICATIONS
Technical Specifications
Frequency Range
865.600÷867.600 MHz (ETSI EN 302 208 v3.3.1)
902÷928 MHz (FCC part 15.247)
RF Power
Configurable from 10 dBm to 30 dBm (from 10 mW to 1W) conducted
power
RX Sensitivity
-85dBm –10%PER, assuming 20 dB antenna RL @ 30 dBm output
Antenna VSWR
Requirement
< 2:1 for optimum performances
Antenna Connectors
50 Ohm mono-static RF port on a single pin
Frequency Tolerance
±10ppm over the entire temperature range
Number of Channels
4 channels (compliant to ETSI EN 302 208 v3.3.1)
50 hopping channels (compliant to FCC part 15.247)
Standard Compliance
EPC C1G2 / ISO18000-63
I/O Interface
4 I/O lines 3.3V level
Iout @ 8mA max
Connectivity
UART Serial Port
Baudrate: from 9.6 to 921.6 kbps, default 921.6 kbps
Databits: 8
Stopbits:1
Parity: none
Flow control: none
3.3 V I/O voltage level
Power Supply
4.75 ÷ 5.25 V DC
Power Consumption
-1.4 A @ 5 V - RF out = 30 dBm
-5 mA in idle mode - Ready to receive commands
Dimensions
(L) 32 x (W) 29 x (H) 4.1 mm3
1.26 x 1.14 x 0.16 inches3
Package Type
32 pin surface mount module (SMT compatible)
Operating Temperature
-20°C to +70°C
Weight
5.4 g
Tab. 2.1: Lepton7R7100C Technical Specifications
Y
Warning: The RF settings must match the operating country/region to comply with local laws and
regulations.
The usage of the reader in different countries/regions from the one in which the device has been
sold is not allowed.

TECHNICAL SPECIFICATIONS - Lepton7- Technical Information Manual 8
Key Features
RAIN RFID (UHF EPC Class1 Gen2, ISO 18000-63) compliant
Both ETSI and FCC support in the same module
Ultra compact size
Up to 30 dBm (1W) output power
-85 dBm Rx sensitivity, assuming 20 dB antenna return loss
Impinj RS500 and RS1000 pin-to-pin compatibility
Inventory (FastID, Tag Population Estimate, Select, Session, Target)
Access (Read, Write, Lock, Kill, BlockPermalock, and QT)
Shielded to prevent unwanted radiation and provide noise immunity in embedded environments
29 mm by 32 mm by 4.1 mm surface mount package with SMT compatibility
Single mono-static RF port
Field upgradability via firmware updates. Gen 2 v2 will be firmware upgradable
UART serial interface using CAEN RFID easy2read©protocol
Test features (CW, PRBS, custom regions, channel lists, and fixed frequency)

HARDWARE INTERFACE - Lepton7- Technical Information Manual 9
3HARDWARE INTERFACE
Introduction
An example Lepton7R7100C system-level block diagram for an embedded system is shown in Fig. 3.1:
Lepton7 R7100C - Example of Block Diagram. This figure shows the electrical connections that may and must
be made to control the Lepton7R7100C. 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: Lepton7R7100C - Example of Block Diagram
Required connections:
•VDC_IN and GND are required to power the Lepton7R7100C.
•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 Lepton7R7100C 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 Lepton7 internal microcontroller NRST, TST and BSL_SEL
signals shall be driven as in the picture below:

HARDWARE INTERFACE - Lepton7- Technical Information Manual 10
Fig. 3.2: BSL sequence
The BSL program execution starts when TST pin has received a minimum of two positive transitions and
if TST is high while /RST rises from low to high. BSL_SEL shall be at high level before BSL starts. Pulses
length and distance between edges of all signals shall be 10ms at least.
•UART2 Tx and Rx may be used to examine debug information.
Optional connections:
•GPIOs allow interaction with the Lepton7R7100C as both digital inputs and outputs. They may be used to
trigger inventory, generate events based on inventory activity, or provide general-purpose user-
controlled digital I/O.
•WKUP provides a mechanism to wake up the Lepton7R7100C from the low power Sleep mode. If
unused, this pin should be tied to logic low.
•UC_ADC allows use of an ADC to convert an analog input voltage into a digital value.
•UC_DAC allows use of a DAC to generate an analog output voltage from a digital value.
•RFU is a GPIO reserved for future use.
Power Supply
The Lepton7R7100C is powered by a voltage applied to the VDC_IN pin (pin 11) relative to the GND pins. The
supply voltage operating range is 4.75 V to 5.25 V. Current consumption varies from about 1400 mA to about
5mA depending on the operating mode. The power supply is internally bypassed and regulated, and no
external bypass or bulk storage capacitance is required, as long as the input voltage is stable.
If Lepton7R7100C activity is not required at all times, and power reduction is desired, the VDC_IN supply
voltage may be externally gated to remove power to the device.
RF Connection
The Lepton7R7100C has a single RF pin (pin 1) which should be connected to a 50 Ω antenna via 50 Ω
controlled impedance connection. This connection could simply be a microstrip transmission line to a PCB
antenna or SMT antenna, or it could include a connector and coaxial cable. The RF connection is single
ended, referenced to ground.
For more information about impedance matching, see PCB Layout for RF page 17.
UART Communication
The Lepton7R7100C has two full-duplex UART standard interfaces, accessible using pins UART1-RX, UART1-
TX, UART2-RX, and UART2-TX. UART1 implements the host communication interface via easy2read©, and
UART2 implements the debug interface (RFU). The Tx pins are outputs from the Lepton7R7100C, and the Rx
pins are inputs to the Lepton7R7100C. Both UART interfaces are 921,600 baud, with 8 data bits, 1 stop bit,
and no parity bit (8-n-1 configuration).