Datasheet

Pinouts

There are two sets of control input pins on either side. Both sides of the pins are identical! Use whichever side you

like, you can also easily chain by connecting up two side-by-side

Power Pins

GND - This is the power and signal ground pin, must be connected

VCC - This is the logic power pin, connect this to the logic level you want to use for the PCA9685 output, should

be 3 - 5V max! It's also used for the 10K pullups on SCL/SDA so unless you have your own pullups, have it match

the microcontroller's logic level too!

V+ - This is an

optional

power pin that will supply distributed power to the servos. If you are not using for servos

you can leave disconnected. It is not used at all by the chip. You can also inject power from the 2-pin terminal

block at the top of the board. You should provide 5-6VDC if you are using servos. If you have to, you can go

higher to 12VDC, but if you mess up and connect VCC to V+ you could damage your board!

Control Pins

SCL - I2C clock pin, connect to your microcontrollers I2C clock line. Can use 3V or 5V logic, and has a weak

pullup to VCC

SDA - I2C data pin, connect to your microcontrollers I2C data line. Can use 3V or 5V logic, and has a weak pullup

to VCC

OE - Output enable. Can be used to quickly disable all outputs. When this pin is

low

all pins are

enabled

. When

the pin is

high

the outputs are

disabled

. Pulled low by default so it's an optional pin!

Output Ports

There are 16 output ports. Each port has 3 pins: V+, GND and the PWM output. Each PWM runs completely

independently

but

they must all have the same PWM frequency. That is, for LEDs you probably want 1.0 KHz but servos