SILION SIM7500 UHF Reading and Writing Module User Manual
Revised records
| documentnumber | version | Date of formulation / modification | Reason | Change thecontent |
| V1.0 | 2021-11-25 | The initial version | / |
Product presentation
Ultra-small RFID module SIM7500 is a cost-effective ultra-high frequency RFID reading and writingmoduledeveloped by the technical team of Core Alliance Exhibition based on the IMPINJ new generation RFchipE710.SIM7500 The module is only the size of a coin, and it is designed for high-performance RFIDhandhelddevicesandmobile portable devices. SIM7500 Its low power consumption, small size, good RF performance, andadvancedanti-interference design make it a priority for low-cost mobile devices.
Product characteristics
The new generation of E710 RF chip
Using IMPINJ new generation E710 UHF RF reader chip, high sensitivity, wide readingrange,low power consumption.
Low-power design
Low power design, maximum power consumption 4.5W
Patch design
With stamp hole mode for facilitate patch mounting
Small size
The exterior size of the module is only 28mm * 28mm * 4mm, which is the size of acoin.Thesmall size is suitable for a variety of installation scenarios.
Electrical character
| Parameter | Condition | Min | Typical | Max | Unit | |
| Frequency | ||||||
| Frequency range | According Customization | 840 | 960 | MHz | ||
| Frequency step value | According Customization | 250/500 | KHz | |||
| output | ||||||
| output power | 5 | 30 | dBm | |||
| Output power accuracy | +/- 1 | dB | ||||
| Output power flatness | +/- 0.5 | dB | ||||
| Label | ||||||
| Receiving sensitivity | -88 | dBm | ||||
| Stock the label peak speed | 900 | tag/s | ||||
| Label cache area | 96 bit EPC | 1000 | tag | |||
| logic level | ||||||
| VIL，Input Low Voltage | -0.5 | 0.8 | V | |||
| VIH，Input High Voltage | 2 | Vdd+0.5 | V | |||
| Temperature range | ||||||
| Storage temperature | -40 | 85 | ℃ | |||
| Working temperature | -20 | 55 | ℃ | |||
| Enter the power supply | ||||||
| Supply voltage | 3.6 | 5.0 | 5.25 | V | ||
| Standby mode | 165 | mA | ||||
| Card reading mode | Pout=30dBm, 50 Ω Load | 900 | mA | |||
(1) The current varies depending on the load.
Absolute maximum rated parameter
| parameter | Rating |
| Service voltage | +3.6 ~ +5V±5% |
| Digital I/O Voltage to GND | 3.3V |
| Working temperature | -20 ~ +55℃ |
| Storage temperature | -40 ~ +85℃ |
Pin configuration and function description
| Pin | Definition |
| 1 | VCC(+3.6 – 5V) |
| 2 | GND |
| 3 | EN Module power enabling:LOW(POWER DOWN) HIGH&DISCONNECT(ACTIVE) |
| 4 | Digital Output 2 （GPIO OUT2） |
| 5 | Digital Input 1 （GPIO IN 1） |
| 6 | Digital Input 2 （GPIO IN 2） |
| 7 | RXD (DATA INPUT，TTL level ) |
| 8 | TXD (DATA OUTPUT，TTL level ) |
| 9 | RST (LOW ACTIVE，Do not use, please hover) |
| 10 | Digital Output 1 （GPIO OUT1） |
| 11 | GND |
| 12 | Module 3.3V output |
| 13 | SWCLK SWD Burning the interface clock line |
| 14 | SWDIO SWDBurning the interface clock line |
| 15 | RFU |
| 16 | RFU |
| 17 | GND |
| 18 | GND |
| 19 | ANT |
| 20 | GND |
Application message
Enter the power supply
The VCC port is recommended to filter with a tantalum capacitor of 100 to 470 uFto reduce the quick on and off power traction of the power amplifier during RF
transmission.0.1 uF and 100 pF capacitor filter out the power ripple in differentfrequency bands.
Enable / reset
EN enables, built-in 47K pull resistance to VCC, high level or suspended when themodule power, low level when the module power (low level should be less than 0.4V, highlevel should be greater than 0.9V less than VCC). RST reset, built-in pull resistanceto 3.3V, connected to the low level reset.
GPIO joggle
Input：
Logic low <0.8 V minimum 0V
Logic high >2V maximum 3.3V
output：
Logic low maximum 0.4V
Logic high minimum 2.9V，maximum 3.3V
The maximum output current of the IO port is 5 mA.
Antenna connection
The antenna port output impedance is 50 ohm, and please use the 50 ohm microstripline or strip line for the PCB connection. The impedance of the antenna should alsobe 50 ohm, the antenna standing wave ratio is recommended to be less than 1.5, betterantenna standing wave ratio can get better card reading effect.
Communication interface RXD and TXD
The communication interface RXD and TXD are both TTL level, and it is recommendedto refer to the above application schematic diagram to connect. The communication waverate was 115,200 bps
Physical characteristics
Product size ：28mm*28mm*4mm
FCC STATEMENT
This device complies with Part 15 of the FCC Rules. Operation is subject to the followingtwoconditions:This device may not cause harmful interference, and
This device must accept any interference received, including interference that may causeundesiredoperation. Warning: Changes or modifications not expressly approved by the party responsible for compliancecouldvoid the user’s authority to operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class Bdigital device,pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protectionagainstharmful interference in a residential installation. This equipment generates uses and canradiateradiofrequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.However, there is no guarantee that interference will not occur in a particular installation. If thisequipmentdoes cause harmful interference to radio or television reception, which can be determinedbyturningtheequipment off and on, the user is encouraged to try to correct the interference by one or moreof thefollowing measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver. Connect the equipment into an outlet on a circuit different from that to which the receiver isconnected.Consult the dealer or an experienced radio/TV technician for help.
FCC Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. Thisequipment should be installed and operated with minimum distance 20mm between the radiator
Integration instructions for host product manufacturers according to KDB 996369 D03 OEMManual v01
List of applicable FCC rules
FCC Part 15 Subpart C 15.247 & 15.207 & 15.209
Specific operational use conditions
Operation Frequency:902-928MHz
Number of Channel:50 Channels
Modulation Type:ASK
Antenna Type:Ceramic antenna
Antenna Gain(Peak):2.5 dBi (Provided by customer)
The module can be used for mobile or portable applications with a maximum 2.5dBi antenna. Thehost manufacturer installing this module into their product must ensure that the final composit product complies with the FCC requirements by a technical assessment or evaluation to the FCCrules, including the transmitter operaition. The host manufacturer has to be aware not to provide informationto the end user regarding how to install or remove this RF module in the user’s manual of the endproduct which integrates this module. The end user manual shall include all required regulatory information/warning as show in this manual.
Limited module procedures
Not applicable. The module is a Single module and complies with the requirement of FCCPart 15.212.
Trace antenna designs
Not applicable. The module has its own antenna, and doesn’t need a host’s printed board microstriptrace antenna etc.
RF exposure considerations
The module must be installed in the host equipment such that at least 20mm is maintained betweentheantenna and users’ body; and if RF exposure statement or module layout is changed, then the host product manufacturer required to take responsibility of the module through a change in FCCIDor newapplication. The FCC ID of the module cannot be used on the final product. In these circumstances, thehost manufacturer will be responsible for re evaluating the end product (including the transmitter) andobtaining a separate FCC authorization.
Antennas
Antenna Specification are as follows:
Antenna Type:Ceramic antenna
Antenna Gain(Peak):2.5 dBi (Provided by customer)
This device is intended only for host manufacturers under the following conditions:
The transmitter module may not be co-located with any other transmitter or antenna;
The module shall be only used with the External antenna(s) that has been originally tested and certified with this module. The antenna must be either permanently attached or employ a ‘unique’ antenna coupler.
As long as the conditions above are met, further transmitter test will not be required. However, thehost manufacturer is still responsible for testing their end-product for any additional compliance requirements required with this module installed (for example, digital device emissions, PCperipheral requirements, etc.).
Label and compliance information
Host product manufacturers need to provide a physical or e-label stating
“Contains FCC ID 2AQ9M-SIM7500 With their finished product.
Information on test modes and additional testing requirements
Operation Frequency:902-928MHz
Number of Channel:50 Channels
Modulation Type:ASK
Antenna Type:Ceramic antenna
Antenna Gain(Peak):2.5 dBi (Provided by customer)
Host manufacturer must perfom test of radiated & conducted emission and spurious emission, etcaccording to the actual test modes for a stand-alone modular transmitter in a host, as well as for multiple simultaneously transmitting modules or other transmittersin a host product. Only when all the test results of test modes comply with FCC requirements, then the end product canbe sold legally.
Additional testing, Part 15 Subpart B disclaimer
The modular transmitter is only FCC authorized for FCC Part 15 Subpart C 15.247 & 15.207 & 15.209and that the host product manufacturer is responsible for compliance to any other FCC rules that applyto the host not covered by the modular transmitter grant of certification. If the grantee markets their product as being Part 15 Subpart B compliant (when it also contains unintentional-radiator digital circuity), then the grantee shall provide a notice stating that the final host product still requires Part 15 Subpart B compliance testing with the modular transmitter installed.
Documents / Resources
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