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Mon Dec 31, 1: Sat Jul 15, 6: I have everything soldered on one board.

Thu May 04, 6: Haven’t soldered anything yet but will this weekend. Sat Jul 15, 9: When you verify, does it show you the value read? No need to make a special programmer. I don’t use a programmer, I just use the on my KIM-1 and program it in place. I am using this programmer just to program the 27sf chips. Just wanted to say thanks to rpress and marc to helping datadheet the schematic on this programmer.

Schematic is on catasheet 8 and fourth post down. It’s best if you do attach images, but if they are big, better not to inline them.

28C 28C parallel eeproms

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. Gonna solder 2 more boards, one with hot air soldering and one with my reflow oven. It sounds like you need to write some board test programs to measure and verify things 2c8512 a flash chip in the socket. You can only flip bits one way by writing, unlike the 28C parts.


It does need you to erase them before programming. Sat Jul 15, 1: I don’t want to reinvent the wheel for something that I’m sure has been done before. Everything goes smoothly had a 2c512 USB wire connecting to my Leonardo and uno but i datashert getting a failure for the verifying part. Fri Jul 14, Users browsing this forum: I should note that the dagasheet sheet I saw had the incorrect timing diagram for reading the value.

Next step would be my soldering. It has worked before on their boards. I’d think it would be a big deal to even used a C64 or less without too much effort.

Dr Jefyll, Google [Bot] and 2 guests. In other words bypassing your bit mod’s allows you to isolate certain parts of the problem — which of course is a fundamental troubleshooting technique.

Then the remaining sixteen address inputs would come from the programmer. Will report back when soldered and tested. I’m so sorry to post about something obvious. I use a 28C64 on my to adapter. I think the jest of my post was lost. Ok, I will keep that in mind when I post up the boards after soldering the components. 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. Previous topic Next topic. As long as the Vpp is right, it should work. Dwight I’ve message rpress about the reading issue. The caps and solder for them were exactly the same size.

(PDF) 28C512 Datasheet download

But the regular dip socket will be fine for me as i have a ic puller. Here are some pictures in the mean time: So even though it says it wrote the data, it shows as nothing has changed.

These chips were really intended to be programmed in place. I’ve double tripled check my traces and everything goes where it should.

28C512 Datasheet PDF

HTH — good luck! I’ve made some boards based on the optimized version that rpress did. Select a forum Thank you for your quick reply John.