Is it true that I do not need additional pull up resistors if I connect an I2C slave to pins 20 (SDA0-3), 21 (SCL0-3) of the Arduino Due? (On the Arduino Due schematics it is noted as "I2C Voltage Translator".)
If I use the Wire-Library the I2C communication is via pins 20 and 21 ?
How do I do (which library) I2C communication via pins 9 (SDA1 = TWD0) and 10 (SCL1 = TWCK0) ? There are no pull up resistors for pin 9 and 10?
My question: Where are these 1 K pull up resistors (RN5D and RN5C) on the Arduino Due board? I might try to remove them.
Quote from: conradelektro on Mar 06, 2014, 07:23 pmMy question: Where are these 1 K pull up resistors (RN5D and RN5C) on the Arduino Due board? I might try to remove them.As you might guess from their designators, RN5D and RN5C are part of a resistor array. Fortunately, they are the only two resistors used in the array (the rest are not connected), so it's ok to remove the whole thing.See the attached pic for location.I always remove them (with hot tweezers).RegardsChris