[technical parameters]
Product model: CR95HF RFID/NFC Module
Card reading distance (according to the protocol, we test the following 3 types):
(Note: a card quality depends on both distance and position)
ISO14443A:D = 45mm (at the same time, the size and quality depends on the position.)
ISO14443B:D = 45mm (at the same time, the size and quality depends on the position.)
ISO15693:D = 70mm (at the same time, the size and quality depends on the position.)
Write card distance: to be measured
Working current is 35mA (minimum value), 40mA (typical value), 50mA (max value) DC3.3V.
Idle current: < 10mA DC3.3V
Module power supply: DC5V (SGM2019-3.3V LDO chip on board).
Control interface: SPI / UART (users can modify themselves, initially set to SPI interface).
Module size: 85.5mm x 54mm
[delivery list]
CR95HF module: 1,
S50 (ISO14443A protocol) ordinary white card: 1 cards, [Note: the size of 85.6mm * 54mm]
SRT512 (ISO14443B protocol) white card: 1 cards, [Note: the size of 85.6mm * 54mm]
I-Code2 (ISO15693 protocol) self-adhesive flexible label card: 1. [Note: the size of the card is 50mm * 50mm]
[Note: the use of 50mm * 50mm 15693 card, card reading distance D = 60mm]
The following /******* for some specific technical information *******/
[buyers please compare the similarities and differences of all kinds of RFID/NFC chips. ]
Our store does not evaluate the advantages and disadvantages of various RFID/NFC implementations. Please buyers select them. ]
[when choosing the CR95HF plan, the default buyer has already known its advantages and disadvantages. ]
The protocol type supported by CR95HF: (see the chip manual for details)
1. ISO/IEC 14443-3 Type A and B Tags
2. ISO/IEC 15693 Tags
3. ISO/IEC 18000-3M1 Tags
4. NFC Forum tags: Types 1, 2, 3 and 4
5. ST short-range interface (SRI) tags
6. ST long-range interface (LRI) tags
7. ST Dual Interface EEPROM
[software programming reference]
Please note: we are unable to provide programming support for CR95HF at the present stage. For transplant development, please refer to ST's official website routines.
Please note: we are only providing a hardware platform at the stage, debugging and testing using official website program.
[about control interface]
The modules are connected by default using the SPI interface. If users want to change to UART interface, the resistance R9 can be removed and welded to the R10 location, so that the module can be set as UART interface.
The power supply of the module is +5V or +3.3V, and only one of them is needed.
When +5V is used, the on-board LDO will work to provide +3.3V power to the chip.
When using +3.3V, the board LDO does not work.
[test mode]
Use ST M24LR-DISCOVERY kit development kit routines to test modules.
The version of the slave routine is CR95HF Demo board project V2.1.2. (the routine has source code)
The host software version is CR95HF demonstration board Version 2.1.1. (the software is not source code)
In the routine, STM32F103CBT6 is used to control CR95HF, and then communicates with host computer software through USB interface. For details, please refer to the document UM1589 "M24LR-DISCOVERY kit user guide". Therefore, users first need to prepare a STM32F1xx based circuit board with USB interface, and reserve PA2 to PA7 pin interface. If you use other types of MCU, you need to gradually transplant the routine.
There are 6 pins on the hardware connection: PA2 ~ PA7.
Among them, PA2 and PA3 are UART pins (routines as GPIO) and PA4 ~ PA7 as SPI1 pins.
Plus 2 power supply pins, 8 pins must be connected.