I mean, Texas Instruments had enough patience to make a font, didn't they?
Well, they also had years to work on it, and I believe they just copy-pasta'd.
Indeed. The font is very common on devices with a low-res LCD screen.
Example:
The font looks fammiliar, no? And seen from some CSE screenshots, the CSE font looks like it's just a higher-resolution version of this (with a few exceptions).