Page 61

As the internal pull-down resistor is used, the switch can be connected to the line and ground without any external resistors:

should read:

As the internal pull-up resistor is used, the switch can be connected to the line and ground without any external resistors:

 

Page 131

The line in the first new paragraph:

The PWM output in this configuration mimics the workings of an 8-bit A-to-D converter.

shoudl read:

The PWM output in this configuration mimics the workings of an 8-bit D-to-A converter.

i.e. swap A and D.

 

 

Page 135

The graph axis labels need to be switched.