ATtiny5 datasheet(45/168 Pages) ATMEL

No. de pieza	ATtiny5

Descripción Electrónicos	8-bit Microcontroller with 512/1024 Bytes In-System Programmable Flash

PDF	168 Pages

Scroll/Zoom	100%

Fabricante Electrónico	ATMEL [ATMEL Corporation]

Página de inicio	http://www.atmel.com

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45 / 168 page

8127C–AVR–10/09

ATtiny4/5/9/10

10.2.7

Program Example

The following code example shows how to set port B pin 0 high, pin 1 low, and define the port

pins from 2 to 3 as input with a pull-up assigned to port pin 2. The resulting pin values are read

back again, but as previously discussed, a nop instruction is included to be able to read back the

value recently assigned to some of the pins.

Note:

See “Code Examples” on page 5.

10.3 Alternate Port Functions

Most port pins have alternate functions in addition to being general digital I/Os. In Figure 10-6

below is shown how the port pin control signals from the simplified Figure 10-2 on page 41 can

be overridden by alternate functions.

Assembly Code Example

...

; Define pull-ups and set outputs high

; Define directions for port pins

ldi

r16,(1<<PUEB2)

ldi

r17,(1<<PB0)

ldi

r18,(1<<DDB1)|(1<<DDB0)

out

PUEB,r16

out

PORTB,r17

out

DDRB,r18

; Insert nop for synchronization

nop

; Read port pins

r16,PINB

...

ATtiny5 Datasheet(PDF) 45 Page - ATMEL Corporation