MEGA2560 rev3 I2C pins and pull-up resistors

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

Where did you see pins 02/01 referred to as SDA/SCL ?

In the schematic in pdf of the MEGA2560 rev3

attached an extract

Does that not simply illustrate that SDA/SCL are broken out to pins 1 and 2 of JP6 as well as pins 20/21 on the standard header.

The Uno has had multiple connections to the same SDA/SCL pins for some time