Flash Memory

Flash Memory on the Audio Shield and externally

The Teensy audio shield contains 8 pads that you can solder a SOIC 8-pin flash memory chip to the shield.

You can also use a SOIC-8 pin to through hole pin header to bring out the flash memory, such as the Sparkfun BOB-13655.

You would use the Serial Flash library to access this memory.

Flash memory chips that are known to work with both the audio shield and the Teensy 4.1 include:

• W25Q128JVSIQ-ND, 128 megabit/16 megabyte storage.

Here is a post containing timing information on accessing flash memory vs. SD cards.

You can use Frank Boesing's Teensy Transfer to inspect, write to, and read from flash memory on a Teensy LC, 3.1, 3.2, 3.5, or 3.6 (right now it does not work on a Teensy 4.0):

• Github page with the code
• PJRC thread about TeensyTransfer

Teensy 4.1 QSPI flash and psram pads

The Teensy 4.1 has two sets of pads to solder one or two 8 pin QSPI flash memory chips directly on the Teensy. One of the pads is set up for a SOIC 8-pin flash (same flash as used by the audio board). The other set of pads has a smaller footprint, and is meant for SOC 8-pin psram memory.