User Manual

7
Power Switch
The power switch is controlled by the MCU Atmega328. Basically, there are 2 states: SLEEP
and RUNNING.
When the power cable is plugged in, the red LED indicator will light up and the MCU will turn
into the SLEEP mode.
When the button is pressed, the MCU is wakened from sleep and switches on the power of
the Raspberry Pi, so RPi is booted up too. This is the RUNNING mode.
When it's in the RUNNING mode, you can press again and hold the power switch for more
than 2 seconds. The MCU will go back to the SLEEP mode then.
Motor, Ethernet and USB Ports
Ethernet Port
The Ethernet port of the Raspberry Pi. You can just connect a network cable to the RPi for
access to the Internet.
USB Port
4 of the USB ports are reserved. The built-in microphone comes from CM108 USB Microphone.
So, the top right of the USB is taken:
Motor Port
The PiSmart Box uses a TB6612 for motor controls.
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