System Design Document

A project log for VGA Graphics Over SPI and Serial - VGATonic

640x480 (and 848x480!) Color VGA Video Card for Microcontrollers and Single Board Computers

PKPK 08/16/2015 at 09:210 Comments

I just finished the initial System Design Document. It also includes some newly measured details on power consumption (Edit: I set up a better test bench with a reliable adapter today; picture/results below).

It also lays out some of the future work I'd like to complete, including additional firmware - so folks who don't want to use VGA can switch to NTSC or something instead.

This document is on top of the User's Guide I released (with the Hacker's Guide inset!) that lists a lot of the features onboard, and details some of the protocols I used. If you're interested in VGATonic, I'd suggest reading them both!


I set up a better testbench today. Here is a picture of one of the worst case readings:

I'm getting between 140 and 158 mA @ 5V here, so let's call it between .7 and .85 Watts for a graphics card. Not bad - I'd say that competes pretty well with what's out there, haha!