8MB PSRAM chip for Teensy 4.1

via Pimoroni
Sold out
$3.00
SKU PR-COM0218

We can get 100 units in Australia from Pimoroni. If you order today, we can dispatch this stock between Jan 26, 2021 - Feb 02, 2021.

This PSRAM chip can add 8 Megabytes of RAM for use on Teensy 4.1

One PSRAM Chip for 8 MB Memory

The PSRAM chip is meant to be soldered to the smaller pads on the bottom side of Teensy 4.1, underneath the SD card socket, between pins 31-32 and 33-34. Do not use the larger pads. A single PSRAM chip must be solded to the smaller pads to be detected.

Two PSRAM Chips for 16 MB Memory

If 8 MB isn't enough, you can solder 2 PSRAM chips for a total of 16 MB.

Memory Test Program

After soldering the PSRAM to your Teensy 4.1, run this memory test program to verify the PSRAM memory really is working properly.

Documentation

Click here for the datasheet for this chip

Using PSRAM Memory

To use PSRAM memory in Arduino, add EXTMEM to large arrays or other variables you wish to be allocated in the PSRAM. These variables are not initialized and will contain random data when your program starts, so don't forget to set them to zero or fill them with the data you need before use.