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Update for 03-11-21 18:00

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Tyler Perkins 2021-11-03 18:00:01 -04:00
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@ -47,7 +47,13 @@ Port C controls the analog Pins,
Port B controls pins D8 - 13
Each port has 3 registers associated with it. Port* is the register that allows
writing to the pins. These are PortB (0x25), PortC (0x28)
writing to the pins. These are PortB (0x25), PortC (0x28), and PortD (0x2B).
The Data Direction Registers (DDR*) determine if the Pin is used for Input or
Output. When a bit is set to zero (0), the pin will be used for input. Setting
a pin to one (1) will enable it for output. The three DDR* registers are DDRB,
(0x24), DDRC (0x27), and DDRD (0x2A). Finally, there are the PIN* registers,
which allow for input to taken. These registers are read only. The three PIN*
registers are PINB (0x23), PINC (0x26), and PIND (0x29).
* PortC