A companion sidecar board with microSD connector to mate with the Teensy 4 Header Breakout Board. It's designed to solder to the top 9 pins on the left side of the header breakout. The 9th pin provides an optional card detect (short the solder bridge) on digital pin 29.
Designed in KiCad.
Notes:
- See also Combo SD/USB Host breakout
- In progress: First version works great!
- With longer header pins you should be able to flip the board to be under or over the Teensy 4.0
- Uses Hirose DM3D microSD socket
- Added decoupling cap C1, 0.1uF
- Bridge the CARD DETECT jumper to use pin 29 to detect a card in the slot. Needs INPUT_PULLUP.
Pinout:
- 34/SD DAT1
- 35/SD DAT0
- GND
- 36/SD CLK
- 3.3V
- 37/SD CMD
- 38/SD DAT3
- 39/SD DAT2
- 29/Card Detect