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Download the data sheet to see how to address, read, and write to the chip.

Send Bitcoin tips to: Someone recently tried hooking up a static RAM chip to an Arduino with some shift registers. Select a forum As long as the Vpp is right, it should work. No need to make a special datssheet.

These parallel eeproms are old technology. The 28Cxx parts have a built in charge pump circuit to create their programming voltage. You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot post attachments in this forum. Ok, I will keep that in mind when I post up the boards after soldering the components. Sat Jul 15, 6: Thu Jul 13, The caps and solder for them were exactly the same size.


Schematic is on page 8 and fourth post down. Thank you for your quick reply John. I use a 28C64 on my to adapter.

Dwight, there is a charge pump circuit on the boards.

28C512 Datasheet PDF

One should use the levels stated in the table and not the diagram. Dwight I’ve message rpress about the reading issue. As a temporary, workaround solution it would allow you to program the chip although rather inconveniently in two separate passes. Two things arise from this.

28C datasheet & applicatoin notes – Datasheet Archive

That should make it possible to use the chip without needing a Mega for the extra pins. Sat Jul 15, 1: When you verify, does datwsheet show you the value read?

I seem to find many posts about Ic2 eeproms and SPI eeproms, but not parallel eeproms. Welcome, Universal One thing you could do is treat the at29ca k chip as a 64 k chip by tying address input A16 high or low. I’d think it would be a big deal to even used a C64 or less without too much effort. Previous topic Next topic. Dataseet can only flip bits one way by writing, unlike the 28C parts.


28c5122 — good luck! I am using this programmer just to program the 27sf chips. It does need you to erase them before programming.

It sounds like you need to write some board test programs to measure and verify things without a flash chip in the socket. Can you post the schematic? Next step would be my soldering. These chips were really intended to be programmed in place. Then the remaining sixteen address inputs would come from the programmer.

Everything goes smoothly had a finicky USB wire connecting to my Datashee and uno but i am getting a failure for the verifying part.

View 28c512-513 datasheet:

Page 15 of Dr Jefyll, Google [Bot] and 2 guests. I’ve made some boards based on the optimized version that rpress did. Sat Jul 15, 2: Did you check capacitor polarity? There’d be no need for hardware or software to support a bit address, so these options could datashet omitted or temporarily bypassed.

I have everything soldered on one board.