hello,
In the schematic of the MEGA2560 rev3 , they are 2 set of pins for SDA/SCL:
- pin 20/21
- pin 02/01
Can they be used indifferently?
There is also in the schema pull-up resistors of 10K (RN1B/RN1C) for SDA/SCL, are they in place for the 2 set of pins ?
My concern is that the pull-up resistors are sometimes also included in the slaves composants; in this case what is the impact to cumulate pull-up resistors for I2C ?
Thanks for your answers