register_bit.md

Registers

!!! Attention resistor[ruh_zi_str] : electrical component that implements electrical resistance
register[reh_juh_str] : a memory location within the actual processor that work at very fast speeds

n-ary numbers

• 1 byte = 8 bits = 2^8 = 256 = [7:0]

• 1 B = 8 b

  JP	EN	usable	15	255	255
  2進数	Binary	0,1	0b1111	0b11111111	B11111111
  10進数	Decimal	0,1,2,3,4,5,6,7,8,9	0d15	0d255	255
  16進数	Hexadecimal	0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F	0xf	0xff	$f

• Ref. 2進数、8進数、10進数、16進数相互変換ツール

!!! Note 1kB = 1 [kilo] byte = 1000 B
1KB = 1 [ke̞ː] byte = 1024 B = 2^10 B = 1KiB = 1 [kibi] byte

1 bps = 1 [bits per second]  

pinout

Datasheet

ATtiny1614

5.　I/O Multiplexing and Considerations
5.1 Multiplexed Signals


Pin names are of type Pxn, with x being the PORT instance (A, B) and n the pin number. T``

16 . PORT - I/O Pin Configuration
16.1 Features
General Purpose Input and Output Pins with Individual Configuration:
– Pull-up

16.2 Overview

The I/O pins of the device are controlled by instances of the PORT peripheral registers. Each PORT instance has up to eight I/O pins. The PORTs are named PORTA, PORTB, PORTC, etc.

Each PORT pin has a corresponding bit in the Data Direction (PORTx.DIR) and Data Output Value (PORTx.OUT) registers to enable that pin as an output and to define the output state. For example, pin PA3 is controlled by DIR[3] and OUT[3] of the PORTA instance.

16.4 Register Summary - PORTx

16.5.1 Data Direction

Name: DIR
This bit field controls the output driver for each PORTx pin.

Value	Description
0	Pxn is configured as an input-only pin, and the output driver is disabled
1	Pxn is configured as an output pin, and the output driver is enabled