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In my project,I am trying to write some data in to 24c08 serial eeprom. Also a timer 1 interupt subrountie may run at every 1ms to count the run time. Should i set the EA to 0 before access the serial eeprom to prevent data loss. Moreover, if i do so, i think some interupt will be miss and affect the accuracy of the timer. How can i solve this problem? Finally, my programm is code at C. Anyways for me to calculate the system time?
An I2C master can pause at any time during an I2C transmission. It doesn't matter if you are using an I2C peripheral in your micro, or manually bit-banging. You can stop at any time (with the clock high or low), and resume later. The only restriction is that you must make sure that SDA and SCL are not altered by the timer interrupt service.