MFRC522-PD, a card reading distance up to 80mm [spot] pen
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[technical parameters]
Product model: MFRC522-PD
Read distance: D = 80mm (Note: quality depends on a and position)
Write card distance: to be measured
Working current is 30mA (minimum value), 40mA (typical value), 50mA (max value) DC3.3V.
Module power supply: DC5V (SGM2019-3.3V LDO chip on board).
Control interface: UART / SPI / I2C (users can modify themselves, initially set as UART interface).
Module size: 85.5mm x 54mm (see screen mark on PCB for size information).
[delivery list]
MFRC522-PD module: 1,
S50 common white card: 1,
9P 2.54mm spacing single row straight needle: 1,
9P 2.54mm spacing single bent needle: 1.
Module size: 85.5mm x 54mm
Connecting socket: 2.54mm single row, you can use a variety of plug-ins: straight needle, curved needle, the other with the size of the socket. (when we tested, the interference fit between the connector and the board was used to connect the signal, so every socket of the board was empty.
[software programming reference]
The seventh chapter in the Chinese version of ISO 14443 protocol.Pdf: initialization and conflict avoidance, the eighth chapter: transport protocol.
The mifare_reader_invert.jcf file can be opened with Notepad.
In the reference routine folder, there are C51, C430, VB read card reference program and VC reader reference program.
In addition, the specific meaning of each register assignment needs to refer to the MFRC522.pdf document.
[about control interface]
According to the Datasheet of MFRC522, the control interface of the IC is determined by the level of I2C and EA.
In the MF522-PD module, the two configuration lines have been induced, and the type of interface is determined by resistance R3, R4, R5 and R6.
R3 (drop-down, 10K Ohm), R4 (pull up, 100 ohms, no solder on board) controls the level of the pin I2C.
R5 (drop-down, 10K Ohm), R6 (pull up, 100 ohms, no solder on board) controls the level of the pin EA.
For details, refer to the MF522-PD module instruction manual, with the reference schematic of the module.
The schematic diagram of the connection below is for reference only for wiring, not for physical delivery.