AT28C64, 28C64 Datasheet, 28C64 64K ns Parallel PLCC EEPROM Datasheet, buy 28C Find Datasheet EEPROM related suppliers, manufacturers, products and specifications on GlobalSpec – a trusted source of Datasheet EEPROM. Compatible with the Serial Peripheral Interface. (SPI) bus. • Memory array. – 64 Kb (8 Kbytes) of EEPROM. – Page size: 32 bytes. • Write.

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org • View topic – How to Start hardware of EEPROM Self made circuit??

The 1us maximum write pulse time seems really weird, since many processors would need extra circuitry in order to meet that spec. I have see that.

That’s not a Willem programmer. We ain’t got no x Having to use what is in stock at a local store would be extremely limiting, even in the United States where we have lots of big electronics stores.

Sun Jul 03, 4: How to make it should be obvious from the schematic. You could just ground the highest address bit for example. If not, please ask specific questions.

Previous topic Next topic. An example that I have worked with is this one cva. The ‘ and ‘ have 16Kx8 and 32Kx8 but you don’t have to use all of it.

It’s a an entirely different interface with no similarity to 28xx. Fri Jul 01, 4: Sign up using Email and Password. If you have the counters increment automatically after each programming pulse, you will have to debounce the “program” button.


For example you would need a seperate transistor, LED, transmission gate, pull down resistor, and so on for each data line. The program is written in Pascal. Here’s parallel port programmer for a which could probably be adapted to the would be simpler, don’t need the I am still just learning about electronics on my own, so please bear with me.

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A bit of Googling will turn up lots of do it yourself programmers, complete with the software to run them. Are you able to order by mail order, or does it have to be available in a local store?


The address needs eeproj be held for an entire write cycle, so any dynamic latches would need to be able to deal with that. You will want presetable counters like perhaps the 74xx If the cycle limit is intended to guard against stray write events, engineering it to be usable with systems that run at slow clock speeds should have been trivial and would have improved usability.

The Write pulse time is a minimum specification and typically has no upper bound. Absolutely yes If you don’t set things up correctly with both the hardware and the software you might end up with the computer trying to talk to the EEPROM at the same time the EEPROM is trying to talk to the computer, in that case they might short each other out.

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Programmer hardware design is based on Willem Programmer Willem type then. Thanks for the answer. Feprom Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. It has been enhanced many times since the original design came out by many folks around the world.

Post as a guest Name. They say it compiled under Turbo Pascal, which I think has been released into the public domain.

If that were the intended purpose, however, I would expect a specification that would indicate that write pulses within a certain range are guaranteed to be accepted, write pulses that are outside a larger range would be guaranteed to be ignored, and those between the two ranges might arbitrarily be accepted or ignored. You would need a computer with the correct kind of printer port and be able to control the printer eeptom from the software.