28C512 DATASHEET PDF

Zolocage Thu May 04, 9: Datadheet the remaining sixteen address inputs would come from the programmer. 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 seem to find many posts about Ic2 eeproms and SPI eeproms, but not parallel eeproms. The forum software will automatically show a reasonably-sized preview.

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Thank you so much Mario. I see no schematic there? HTH — good luck! Polarity on the capacitors are correct. Sat Jul 15, 1: The forum software will automatically show a reasonably-sized preview.

View 28c datasheet: You need a LOT of pins to control the 15 address pins, 8 data pins and the various control pins. I should note that the data sheet I saw had the incorrect timing diagram for reading the value. Sat Jul 15, Two things arise from this. I have everything soldered on one board.

Everything goes smoothly had a finicky USB wire connecting to my Leonardo and uno but i am getting a failure for the verifying part. However, after doing several searches, including reading several posts about interfacing with eproms, I have yet to find a solution.

Download the data sheet to see how to address, read, and write to the chip. Mon Dec 31, 1: These parallel eeproms are old technology. Thu Jul 13, You can link to a specific post using the little icon to the left of Posted: When you verify, does it show you the value read? One should use the levels stated in the table and not the diagram. Then the remaining sixteen address inputs would come from the programmer. That should make it possible to use the chip without needing a Mega for the extra pins.

Did you check capacitor polarity? The caps and solder for them were exactly the same size. Page 15 of The 28Cxx parts have a built in charge pump circuit to create their programming voltage. It does need you to erase them before programming. Sat Jul 15, 6: Can you post the schematic? In the last photo, i did not account for the zif socket size as i ordered the socket after i had submitted the gerbers.

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28C512 Datasheet

Telabar It might not have a proper connection. Everything goes smoothly had a finicky USB wire connecting to my Leonardo and uno but i am getting a failure for the verifying part. In the last photo, i did not account for the zif socket size as i ordered the datxsheet after i had submitted the gerbers. I see no schematic there?

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

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28C512 DATASHEET PDF

Tygolkis Gonna solder 2 more boards, one with hot air soldering and one with my reflow oven. Did you check capacitor polarity? I should note that the data sheet I saw had the incorrect timing diagram for reading the value. HTH — good luck! However, after doing several searches, including reading several posts about interfacing with eproms, I have yet to find a solution.

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Thank you so much Mario. I see no schematic there? HTH — good luck! Polarity on the capacitors are correct. Sat Jul 15, 1: The forum software will automatically show a reasonably-sized preview. View 28c datasheet: You need a LOT of pins to control the 15 address pins, 8 data pins and the various control pins. I should note that the data sheet I saw had the incorrect timing diagram for reading the value.

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