Posts Tagged ‘eeprom’

EEPROM rotation for ESP8266 and ESP32

Wednesday, June 27th, 2018

Xose Pérez over at Tinkerman writes: The Arduino Core for ESP8266 and ESP32 uses one SPI flash memory sector to emulate an EEPROM. When you initialize the EEPROM object (calling begin) it reads the contents of the sector into a memory buffer. Reading a writing is done over that in-memory...

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Posted in code, tutorials | 4 Comments »

App note: Adding flexibility by using multiple footprints for I2C™ serial EEPROMs

Sunday, January 21st, 2018

Save PCB space by utilizing EEPROM SOIC-8 area, here's an application note from Microchip. Link here (PDF) For many years, the 8-lead SOIC package has been the most popular package for serial EEPROMs, but now smaller packages are becoming more commonplace. This offers a number of benefits; the reductions in...

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Posted in app notes | No Comments »

Talk SPI to EEPROM part3: Test SPI Protocol with Bus Pirate

Tuesday, May 12th, 2015

Jan Cumps tested out SPI Protocol using a Bus Pirate: It wasn't my initial intention to use the Bus Pirate. But my first naive attempts to talk from Hercules to EEPROM failed. I could create the SPI instructions with the LaunchPad, but I didn't get a reply back from the 25LC256....

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Posted in Bus Pirate, testing | No Comments »

Demystifying hardware security with the Bus Pirate

Wednesday, November 12th, 2014

Alain Iamburg over at FishNet Security writes: Welcome to Part III of this series on hardware security. In Part II we explored passive data captures of EEPROM read operations over the SPI bus. In this installment, we will be looking at techniques for actively probing and communicating with such chips. Memory...

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Posted in Bus Pirate, security | No Comments »

GPIBUSB Adapter update

Tuesday, July 8th, 2014

Another update on Scasagrande's project, GPIBUSB Adapter rev4: After working closely with a few individuals it was discovered that some of the pre-existing GPIB software (such as KE5FX's tools) has some hardcoded serial port settings, one of which being the use of hardware flow control. After getting builds of the software...

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Posted in open source, USB | 2 Comments »

RFID reader for BuildBrighton door pt II

Thursday, July 3rd, 2014

Chris Holden has written an article on their new door entry system at BuildBrighton: The basic idea is this: A keyfob is presented to the reader and the serial number read from it. The keyfob number is displayed on the character LCD. This is sent (via the ethernet module) to a URL...

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Posted in hacks, RFID | No Comments »

Open source hardware GPIB USB adapter update

Monday, March 17th, 2014

Steven Casagrande posted an update on his open source hardware GPIB USB adapter: After many days, I just finished off firmware version 5 for my adapter. This is probably my biggest update yet. A lot of people asked for compatibility with the Prologix commands so that's what I focused on. Here...

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Posted in open source | 3 Comments »

App note: F-RAM for smart E-Meters

Saturday, December 21st, 2013

Cypress' application note on smart E-Meters and why its more advantageous to use F-RAM over conventional EEPROMs. This application note provides an overview of a smart electricity meter, or Smart E-Meter, and explains the benefits of using nonvolatile serial F-RAM rather than EEPROM in Smart E-Meter designs.

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Posted in app notes | 1 Comment »

Bus Pirate meets the 93LC46B

Friday, December 20th, 2013

Bob writes: I found an old EEPROM chip in my spare parts collection, the 93LC46B. The data sheet says it communicates using 3-wire serial I/O, and can store 1024 bits organized either as 8- or 16-bit words. Next was the question of how to wire the bus pirate to the...

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Posted in Bus Pirate | No Comments »

Tips and tricks using the 24LC256 I2C EEPROM memories

Wednesday, September 11th, 2013

Jechavarria shared some tips and tricks on using the 24LC256 I2C EEPROM  memories: I resume this brief series of articles with another device I usually use. It’s the popular 24LC256 I2C EEPROM memory, from Microchip. First of all, you can find the datasheet here. This memory has a 32K x 8 bytes of...

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Posted in how-to | 1 Comment »

MEEPROMMER: (E)EPROM programmer based on Arduino hardware

Wednesday, July 31st, 2013

mkeller0815 built  his own programmer - the MEEPROMMER, that is available at github: The idea behind this EEPROM programmer was to have a tool to get data on a 28Cxxx EEPROM for my own 6502 based computer. There are a lot of professional programmers you can buy, but for a...

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Posted in Arduino, programmers | No Comments »

App note: EEPROM emulation using flash

Sunday, March 17th, 2013

[embed][/embed] Here’s is a video describing the basic concepts of using Freescale flash memory to emulate EEPROM.

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Posted in app notes | 1 Comment »

App note: Bit Banging I2C on mid-range MCUs with the XC8 C compiler

Saturday, February 23rd, 2013

Bit Banging I2C on mid-range MCUs with the XC8 C compiler: This application note is intended to serve as a reference for communicating with Microchip's 24XXXX series Serial EEPROM devices without relying on a hardware serial port to handle the I2C operations.

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Posted in app notes | No Comments »

HOW-TO: Access Bus Pirate v4 on-board I2C EEPROM

Wednesday, October 17th, 2012

Bus Pirate v4 has an on-board 24xx64 8Kbyte data storage chip called an  EEPROM (IC3). It can be used to store various settings and preferences, but cooler, the EEPROM's I2C interface can be accessed from within the Bus Pirate's I2C mode. First time users can get familiar with the Bus...

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Posted in how-to, tutorials | 2 Comments »

STM M24LR04E-R 4-Kbit dual interface EEPROM with RFID

Tuesday, September 25th, 2012

STMicroelectronics has introduced the M24LR04E-R 4-Kbit Dual Interface EEPROM with RFID. "The M24LR04E-R device is a dual-interface, electrically erasable programmable memory (EEPROM). It features an I2C interface and can be operated from a VCC power supply. It is also a contactless memory powered by the received carrier electromagnetic wave. The...

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Posted in components, data transfer, documentation, RFID | No Comments »

App note: Extending the life cycle of emulated EEPROM in program memory

Saturday, August 11th, 2012

Some applications require you to store data that wont be lost if the power goes down. Usual solutions involve either using an on-chip EEPROM or external memory devices. This app note from Microchip provides an alternative that allows you to store your data in the programming memory without having the...

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Posted in app notes | No Comments »

Reprogramming USB Webkey dongle using Bus Pirate

Friday, March 2nd, 2012

JJShortcut took one of the webkey USB devices his school was discarding and decided to reverse engineer it. The device plugs into the USB port on a PC and when its on-board button is pushed it opens the computer's web browser, directing the user to a specific URL. He found...

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Posted in Bus Pirate, hacks, reversed, USB | 6 Comments »

Bus Pirate: Modifying the EEPROM on a LED POV fan

Friday, October 28th, 2011

MrZor decided to find some use for his Bus Pirate. After dissembling a LED POV fan he figured out that it uses a 24LC02B EEPROM chip to store the text displayed on the device. The 24LC02B is a I2C device so he used the I2C mode of the Bus Pirate...

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Posted in Bus Pirate | 1 Comment »

Bus Pirate Zeno zit zapper hack update

Friday, July 8th, 2011

Restoring a Zeno zit zaper tip was one of the first published 'hacks' using the Bus Pirate a few years ago. It's still a super popular post that gets a ton of hits. Here's some updates: Was jacking around with the Zeno again recently and figured out (as far as...

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Posted in Bus Pirate, hacks | No Comments »

Web platform: 32Mbit flash instead of EEPROM

Friday, June 3rd, 2011

megabug replaced the 1Mbit EEPROM storage chip on the web platform with a 32Mbit (4MB) flash rom chip. Support is already available in the Microchip TCP/IP stack, so all you need to do is swap the chip and enable a few options in the configuration file Via the forum.

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Posted in web platforms | 2 Comments »

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Recent Comments

  • readybrek: Anyone got a any recommendations for a budget-priced hot air station?
  • William: lol I'm happy to waste 3c for each program/debug cycle... but probably not the time spent soldering a new device down to a proto board!...
  • Joe Desbonnet: Ya, I can recommend the low melting point solder. I used brand 'ChipQuik' and it's amazingly easy to use.
  • Jerome: I need a new BusPirate for the Fablab ;) Many thanks!
  • Max: Seems like an unexpectedly violent way to remove the chip indeed. A hot air station should of course do the job just fine, but in...