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ATtiny44 Datasheet(PDF) 107 Page - ATMEL Corporation

No. de pieza ATtiny44
Descripción Electrónicos  8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
PDF  236 Pages
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Fabricante Electrónico  ATMEL [ATMEL Corporation]
Página de inicio  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATtiny44 Datasheet(HTML) 107 Page - ATMEL Corporation

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107
8006H–AVR–10/09
ATtiny24/44/84
Note:
See “Code Examples” on page 6.
The assembly code example returns the TCNT1 value in the r17:r16 register pair.
The following code examples show how to do an atomic write of the TCNT1 Register contents.
Writing any of the OCR1A/B or ICR1 Registers can be done by using the same principle.
C Code Example
unsigned int
TIM16_ReadTCNT
1( void )
{
unsigned char
sreg;
unsigned int
i;
/* Save global interrupt flag */
sreg = SREG;
/* Disable interrupts */
_CLI();
/* Read TCNT
1 into i */
i = TCNT
1;
/* Restore global interrupt flag */
SREG = sreg;
return
i;
}
Assembly Code Example
TIM16_WriteTCNT
1:
; Save global interrupt flag
in
r18,SREG
; Disable interrupts
cli
; Set TCNT
1 to r17:r16
out
TCNT
1H,r17
out
TCNT
1L,r16
; Restore global interrupt flag
out
SREG,r18
ret



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