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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Sat Jul 02, 4: 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 28644 between the two ranges might arbitrarily be accepted or 28664. Mon Dec 31, 8: Are you able to order by mail order, or does it have to be available in a local store? By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Sun Jul 03, 6: It looks like the ‘ and ‘ also allow counting down as well as up. Which I think would just need a couple more address lines added for a I have had one like this as well as the first one mentioned.

I do not think there ever was an official product called the Willem programmer. Sat Jul 02, 9: Sun Jul 03, 4: Otherwise you will get a lot of consecutive bytes programmed with the same data where you only pressed the button once.

For example here is the datasheet for the 26C64 write timing: Page 2 of 6. If not, please ask specific questions. For example here is the datasheet for the 26C64 write timing:. Post as a guest Name. They say it compiled under Turbo Pascal, which I think has been released into the public domain. It’s a an entirely different interface with no similarity to 28xx. I would not recommend DIP switches, since they are mostly made for very few cycles of life. You could just ground the highest address bit for example.


An example that I have worked with is this one 28664. Sign up using Email and Password.

For example you would need a seperate transistor, LED, transmission gate, pull down resistor, and so on for each data line. Post 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. 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.

EEPROM datasheet & applicatoin notes – Datasheet Archive

Fri Jul 01, The address needs to be held for an entire write cycle, so any dynamic latches would need to be able to deal with that.

So if the write pulse is too long, you clear the chip.

An running at 3. There are two reasons I can think of for having a limit to the write pulse length: They both work very well. Sat Jul 02, 3: It looks like this was done with a PC, but really, it could be modified to work with any computer.


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. How about 28 C 64, or 28[C] or 28[C] Previous topic Next topic. That’s not a Willem programmer.


Then I would have to pay no taxes or duties. Hello, I have see that. Programmer hardware design is based on Willem Programmer Also, 18 bucks to ship it is ridiculous. From the description in the auction: You will want presetable counters like perhaps the 74xx Fri Jul 01, 9: Programmer hardware design is based on Willem Programmer. That’s the main point here.

If the device rejects any write cycles that are efprom long, that may help guard against erroneous write operations in cases where a system operation gets disrupted e. We ain’t got no x Email Required, but never shown. It’s the total price that matters on eBay. Will this process can hazard computer also?? Sign up or log in Sign up using Google. I am just curious, but.

28C64 Datasheet

No registered users and 0 guests. Home Questions Tags Users Unanswered. The Willem type has the dual advantages of being less expensive and will take an external power supply.