AM29F040B DATASHEET PDF

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So, I decided to make a one am29c040b me too. Hello, This is my first post in arduino forum, and I’m very glad to use this great device.

I appreciated your help pito, In the attachement is the screenshot from command definition table of this Flash memory.

AM29F040B Datasheet

To come to this lack of pins, Shift registers should be used, therefore, I bought 2 shift registers 74HC and wire them in cascading which will give us 16 outputs After that, the datashete problem has appeared: I have read the datasheet but my weakness is the Timing Diagram I’m not an electronic engineer I can’t understand it correctly, which means that I can’t write a functionnal code. Send out a 16 bit address only and do check you see the address there with a voltmeter for example.

Q0 – Q7 are connected to A0 – A7 Second shift register: If the vatasheet is programmed you may try to read first 8 addresses for example when the flash is not programmed, erased, you will read FF.

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I also tested my code below but without any result.

AM29F040B Datasheet

Any other clue or idea will be appreciated. Hi Pito, As requested, this is code that I have wrote. When it works then try to read the flash.

First, try the shift registers stuff to get work. The answer was yes. The same with write.

AM29FB Meet Spansion Inc., AM29FB Datasheet

CS high Erasing requires a special sequence too. Below, Is the circuit: Now, Searching for new project and especially in GameBoy console, I have found that some people have made programmable gameboy cartridge, changing its Rom and replace it with AM29F Flash Memory.

I read some replies from people in some forums, they claimed that arduino UNO which I use, is not fast enough to drive correctly AM29FB because arduino can’t drive 20ns or something like thatin other hand some others confirm that’s possible to do. Erase function still remain for later when write and read are functionnal: Q0 – Q7 are connected to A8 – A I would recommend you a step by step approach. The detailed timing diagrams are am29f0400b important for you when working with arduino, except the write process – either you have to wait long datasheef, or you have to poll certain data bits until the flash is written reading a flash takes ns, writing takes several msecs usually.

Then, an29f040b the other signals and do check you see them all as required. Please in the attachement the timing diagram of Write operation, and below the flow of datadheet I have understood from it.

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However, I’m struggling to understand some sentences in the datasheet, if someone please can help me to find out what these phrases mean: CS to low 3. Erase is a sequence of commands see table 4. I have used arduino a couple of months, I have made a different projects using it, such as Car robot, little Game Console with LCD What’s the next step now.

Hi everyone, Regarding the flash memory programming, I can say now that I can read datashest eeprom. Thanks for your reply Pito, Concerning about what you have said, below is the test result that I have made: I tried several algorithm from the writing timing Diagram without success.

So, I think the shift registers dataasheet well and arduino pins too. OE to low 4.

Programmers are so expensive. Usually reading a byte from flash means: Try to create the following functions, ie.: You have to study the writing algorithm, described on pagesor find a ready sw somewhere. LOW For the other pins, they are directly connected to the arduino, despite of this I have test them out with Voltmeter too to be sure.

Thanks for you quick reply, Can you please be more specific about this: