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pi 4 - What is Rpi's I2C Maximum Speed? - Raspberry Pi Stack Exchange
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i2c default clock speed for Pi Pico (RP2040) is 90.9kHz (and 400kHz is around 265kHz) · Issue #4466 · adafruit/circuitpython · GitHub
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PN532 NFC Near Field Communication HAT for Raspberry Pi/Arduino/STM32, NFC Reader/Writer Module Support I2C/SPI/UART Three Interfaces, 13.56MHz Operating Frequency, Support Various NFC/RFID Cards : Amazon.co.uk: Computers & Accessories
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