AM29FB datasheet, AM29FB pdf, AM29FB data sheet, datasheet, data sheet, pdf, Advanced Micro Devices, 4 Megabit ( K x 8-Bit) CMOS AM29FBJI Cypress / Spansion NOR Flash 4M (Kx8) 70ns 5v Parallel NOR Flash datasheet, inventory, & pricing. AM29FB datasheet, AM29FB circuit, AM29FB data sheet: AMD – 4 Megabit ( K x 8-Bit) CMOS Volt-only, Uniform Sector Flash Memory.
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I also tested my code below but without any result.
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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 made an sst39sf programmer you can base your programmer off my code see This will run on your arduino uno note that I used avr-gcc to compile it instead of the datasyeet ide https: Hi Pito, As requested, this is code that I have wrote.
Q0 – Q7 are connected to A8 – A CS high Writing the flash is more complicated – to write a byte into datashfet flash require ie.
Erase function still remain for later when write and read are functionnal: Any other clue or idea will be appreciated. If there is any recommandation or correction please don’t hesistate to do it to help me out: Send out a 16 bit address only and do check you see the address there with a voltmeter for example. Programmers are so expensive.
Try to create the following functions, ie.: The same with write. If the flash is programmed you may try to read first 8 addresses for example when the flash is not programmed, erased, you will read FF.
OE to low 4.
CS daatsheet low 3. Erase is a sequence of commands see table 4. What’s the next step now. Then, set the other signals and do check you see them all as required. First, try the shift registers stuff to get work.
Regarding the read operation, I think it’s very clear but can you be more specific about this: The answer was yes. 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 big problem has appeared: You have to study the writing algorithm, described on pagesor find a ready sw somewhere.
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 Hi pito and everyone, Sorry for the late response. Usually reading a byte from flash means: Hi everyone, Regarding the flash memory programming, I can say now that I can read the eeprom. WE to low 4.
Thanks for your reply Pito, Concerning about what you have said, below is the test result that I have made: Hello, This is my first post in arduino forum, and I’m very glad to use this great device. Thanks for you quick reply, Can you please be more specific about this: I read some replies from people in some forums, they claimed that arduino UNO which I datasheft, is not fast a29f040b to drive correctly AM29FB because arduino can’t drive am29f040h or something like thatin other hand some others confirm that’s possible to do.
Below, Is the circuit: 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.
CS high Erasing requires a special sequence too. I tried several algorithm from the writing timing Diagram without success.
AM29FB Meet Spansion Inc., AM29FB Datasheet
So, I decided to make a one for me too. Please in the attachement the timing diagram of Write operation, and below the flow of what I have understood from it. So, I think the shift registers work well and arduino pins too. I appreciated your help pito, In the attachement is the screenshot from command definition table datashewt this Flash memory. Q0 – Q7 are connected to A0 – A7 Second shift register: 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.