interface SPI 25T80 memory with PIC16F84A

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johnnystrong

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i need to interface an 25T80 memory with PIC16F84A. i found 25T80 datasheet but i could not write to his state register. when i read this register after been writing 0X00, i receive 0XFF. i use proton compiler and issis
is someone can give me an algorithm to access that device please
 

Hi,

That memory chip used the SPI protocol which is not a hardware feature of the 84A.

You could write your own software SPI routine, but it would be simpler to use a more modern 16F chip that has an inbuilt SPI module like the 16f88 or 16f876/7
 

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