Pins

• Michael Meissner created a great table which gives a good overview about different boards and their pin layouts. The first sheet lists the Teensy 3.0, 3.1/3.2, 3.5, 3.6, and LC pins showing their commonality and differences. The second sheet lists the pins used on various shields. The third sheet lists various Adafruit processors using the feather layout (including the Teensy with the Teensy -> feather adapter). The fourth sheet lists the pins used on various feather wings (shields). The fifth sheet lists the pinouts of some I2C boards. Other sheets list various other microprocessor pinouts.

• Influence of Pin Setting on System Function and Performance: NXP Application Note AN5078

• The Teensy 4.0 pinout card from PJRC.COM did not list pin 0 is also SPI CS1, and pin 1 is also SPI MISO1.

• The Teensy 3.1, 3.2, 3.5, and 3.6 pinout cards did not list the pins used by the digital I2S bus. The PJRC.COM link for the Teensy audio shield documents these pins. Pin 9 is BCLK, pin 11 is MCLK, pin 13 is DOUT, pin 22 is DIN, and pin 23 is LRCLK. Note BCLK (pin 11) and MCLK (pin 13) overlap with the normal SPI0 pins, so you will need to use the alternate pins (pin 7 is the alternate MOSI, and pin 14 is the alternate SCLK).