* High Performance, Low Power AVR® 8-Bit Microcontroller
* Advanced RISC Architecture
  – 120 Powerful Instructions
  – Most Single Cl.

VCC GND Port B (PB5..PB0) Digital supply voltage. Ground. Port B is a 6-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The Port B output buffers have symmetrical drive characteristics with both high sink and sou.

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