hello
Im using a pic18f4220 with the C18 compiler.
I have successfully written and read back from EEPROM two bytes of data using 4MHz ceramic resonator.
Next I attemted to perform the same write and read operation from the EEPROM using a 10MHz ceramic resonator.
This did not work at all. My data is not being written in the address location....nor can it be read.
I then decided to use 20MHz and then all the way up to 40MHz.......and i got the same problem.
The EEPROM simply refuses to read or write anything above 4MHz clock speed.
Is this an issue with the pic18F4220?
I have used EEPROM read and write at successfully at 20MHz on a pic18f2420 and i had NO problems.
please can some one suggest how to solve this problem.
thank you
haseeb
Im using a pic18f4220 with the C18 compiler.
I have successfully written and read back from EEPROM two bytes of data using 4MHz ceramic resonator.
Next I attemted to perform the same write and read operation from the EEPROM using a 10MHz ceramic resonator.
This did not work at all. My data is not being written in the address location....nor can it be read.
I then decided to use 20MHz and then all the way up to 40MHz.......and i got the same problem.
The EEPROM simply refuses to read or write anything above 4MHz clock speed.
Is this an issue with the pic18F4220?
I have used EEPROM read and write at successfully at 20MHz on a pic18f2420 and i had NO problems.
please can some one suggest how to solve this problem.
thank you
haseeb