Content for AT28C256

AT28C256

The Microchip AT28C256 is a high-performance 256Kbit Parallel EEPROM available in both Industrial and Military temp ranges, offering access times to 150ns with power dissipation of 440mW. Deselected, CMOS standby current is less than 200μA. Accessed like static RAM for the read or write cycle without external components, it contains a 64-byte page register to allow writing of up to 64bytes simultaneously. Features an internal Error Correction Circuit for extended endurance and improved data retention, in Military version. Optional Software Data Protection mechanism guards against inadvertent writes; and an extra 64 bytes of EEPROM enables device identification or tracking.

Bad Apple on 32K EEPROM

“This post covers how we interface a 32K EEPROM, a clock and an address register to a 20 x 4 LCD character display module and use it to play a video. We “decompress” the video by expanding our 8-bit data …

Vectron VGA Plus Text Mode

“Vectron VGA Plus Text Mode simplifies displaying text with retro computers and microcontrollers by hiding the pixel-level details. Supply only row and column positions, and an ASCII character code, to write text to a 40x30 character VGA display. How It …

There oughta be a WiFi Game Boy cartridge

“It took a while, but I finally managed to create my own Game Boy cartridge. With WiFi! At this point, it can only demo a simple telnet-style communication and access Wikipedia articles, but I am confident that I will showcase …

Vectron Handheld

“Vectron Handheld is a retro handheld gaming console based on the 6502 CPU. It has five input buttons (up, down, left, right, fire) and a 1.8” 128x160 18-bit color TFT LCD display. I have developed an implementation of Pong …

DIY EEPROM Programmer

“I had a number of projects in mind that I wanted to do without the use of a microcontroller. Yet, I needed some sort of persistent data storage that was easy to access on a breadboard with just basic logic …

Project  OMEN Alpha

OMEN Alpha

“As-simple-as-possible computer with the 8085 CPU As-simple-as-possible computer with the 8085 CPU I write a book about old computers. Oh, sorry: I mean “vintage computers” from 80’s. My primary goal is to show how one can build a 8bit …