Adafruit USB Host BFF by Liz Clark published May 03, 2024, last edited April 01, 2025 posted in Adafruit Products Arduino Compatibles CircuitPython Breakout Boards Programming/ MicroPython / CircuitPython Save New Favorite × Please sign in to include this guide in your list of favorites. You will be redirected back to this guide once you sign in, and can then save this guide as one of your favorites. Link Note Download Overview Pinouts CircuitPython Arduino Downloads Single page Feedback? Corrections? Text View Primary Products Your browser does not support the video tag. Adafruit USB Host BFF for QT Py or Xiao with MAX3421E $14.95 Add to Cart Featured Products view all USB OTG Host Cable - MicroB OTG male to A female $2.50 Add to Cart Tiny OTG Adapter - USB Micro to USB $2.95 Add to Cart Miniature Keyboard- Microcontroller-Friendly PS/2 and USB $29.95 Add to Cart 3 Intermediate Product guide Downloads Files MAX3421E Datasheet EagleCAD PCB Files on GitHub Fritzing object in the Adafruit Fritzing Library Schematic and Fab Print On the first batch of boards, the IRQ and CS silkscreen labels are swapped. Pin A1 is CS, labeled IRQ; pin A2 is IRQ, labeled CS. dimensions are in inches Page last edited May 03, 2024 Text editor powered by tinymce. Arduino