About Juergen Abel

Juergen Abel · 2022-07-15

Hello, I am working with an SPI M95M02-DR EEPROM in a Cypress PSoC Creator enviroment.The M95M02-DR is running on a 1 Mbps SPI bus.After each buffer write, a delay of 20 ms is used.If 0xFF is written to all bytes of a page or if random values are wri...

Juergen Abel · 2022-07-19

No, the glitch is not always at the same position, e.g. if the page is filled with 200 times 0x00 and after that with 56 times 0x07, the error position will be at position 201 (and sometimes also at 202), i.e. the first one or two bytes after the 0x0...

Juergen Abel · 2022-07-19

Thanks for all the suggestions, Paul, some of them I have checked already, some of them can be excluded as a reason.To a): Block protect bits BP0 and BP1: it only depends on the number of zeroes I write to a page. Writing itself is working without a ...

Juergen Abel · 2022-07-19

Concerning the speed, I have tried many different speeds, with no success. Using 0.1 MHz instead of 1 MHz SPI speed, the problem even arraises using less zeros on a page, i.e. get's worse.After trying different circuit boards, all of them show the sa...

Juergen Abel · 2022-07-18

Using a very strong power supply produced even lower spikes, but the problem still occurs.The reason for the problem must be probably something else...

Juergen Abel · 2022-07-15

Hello Paul, thanks for your suggestion. There was a 100 nF capacitor between VCC/GND directly at the EEPROM. After adding 2 more 100 nF ceramic, a 47 nF tantal and finally a 47 uF electrolyte capacitor, the error still occurs.With the scope I measure...

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M95M02-DR : Too many zeros within a page produce write errors

Re: M95M02-DR : Too many zeros within a page produce write errors

Re: M95M02-DR : Too many zeros within a page produce write errors

Re: M95M02-DR : Too many zeros within a page produce write errors

Re: M95M02-DR : Too many zeros within a page produce write errors

Re: M95M02-DR : Too many zeros within a page produce write errors