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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It has been enhanced many times since the original design came out by many folks around the world.

An running at 3. In either case, ns seems like a curiously short maximum. How about 28 C 64, or 28[C] or 28[C] Home Questions Tags Users Unanswered. 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.

You will need a Pascal compiler. Will this process can hazard computer also?? Sign up using Email and Password. Fri Jul 01, 2: You would need a computer with the correct kind of printer port and be able to control the printer port from the software.

Page 2 of 6. It looks like this was done with a PC, but really, it could be modified to work with any computer. Then I would have to pay no taxes or duties. How to make it should be obvious from the schematic. 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.


If the part uses dynamic latches to hold the address, those latches may only be able to hold their value for a certain length of time. Neither family is obsolete though. I could be wrong on this, you’ll need to check. We don’t NEED no stinking x86! Here’s parallel port programmer for a which could probably be adapted to the would be simpler, don’t need the I am just curious, but. There are two reasons I can think of for having a limit to the write pulse length: We ain’t got no x 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.


Programmer hardware design is based on Willem Programmer Willem type then. You will want presetable counters like perhaps the 74xx Anyway, it is cheap and works well. 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’s a an entirely different interface with no similarity to 28xx.

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

No registered users and 0 guests. Which I think would just need a couple more address lines added for a 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.


Sat Jul 02, 3: Pls tell how to make this, as where to write this program which type of computer is need.?? The Write pulse time is a minimum specification and typically has no upper bound.

Otherwise you will get a lot of consecutive bytes programmed with the same data where you only pressed the button once. I have had one like this as well as the first one mentioned.

From the description in the auction: Email Required, but never shown. I am still just learning about electronics on my own, so please bear with me. Previous topic Next topic. Sign up or log in Sign up using Google. 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.

So if the write pulse is too long, you clear the chip. Sun Jul 03, 4: Programmer hardware design is based on Willem Programmer Also, 18 bucks to ship it is ridiculous. This meant they could not work down to DC the lowest freq of write cycle possible.

Post as a guest Name. For example here is the datasheet for the 26C64 write timing: