I am using PCA9685 in a project. 3 are on the same i2c bus and thus I need to change the address of individual ICs. It has 5 selectable address bits as shown in the figure below:
The address will change depending on whether A0...A5 are tied to GND or VCC.
Datasheet says that:
To conserve power, no internal pull-up resistors are incorporated on the hardware selectable address pins and they must be pulled HIGH or LOW.
Does it mean I need to use external resistors for pull up or pull down or am I allowed to directly connect the address pins to GND or VCC as per my requirement?