ATtiny261A datasheet(81/292 Pages) ATMEL

Il numero della parte	ATtiny261A

Spiegazioni elettronici	8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash

PDF	292 Pages

Scroll/Zoom	100%

Produttore elettronici	ATMEL [ATMEL Corporation]

Homepage	http://www.atmel.com

Logo

81 / 292 page

8197A–AVR–10/09

ATtiny261A/461A/861A

The following code examples show how to do an atomic write of the TCNT0H/L register con-

tents. Writing any of the OCR0A/B registers can be done by using the same principle.

Note:

See “Code Examples” on page 6.

The assembly code example requires that the r17:r16 register pair contains the value to be writ-

ten to TCNT0H/L.

11.9.1

Reusing the temporary high byte register

If writing to more than one 16-bit register where the high byte is the same for all registers written,

then the high byte only needs to be written once. However, note that the same rule of atomic

operation described previously also applies in this case.

Assembly Code Example

TIM0_WriteTCNT

; Save global interrupt flag

r18,SREG

; Disable interrupts

cli

; Set TCNT

0 to r17:r16

out

TCNT

0H,r17

out

TCNT

0L,r16

; Restore global interrupt flag

out

SREG,r18

ret

C Code Example

void

TIM0_WriteTCNT0( unsigned int i )

{

unsigned char

sreg;

/* Save global interrupt flag */

sreg = SREG;

/* Disable interrupts */

_CLI();

/* Set TCNT0 to i */

TCNT0H = (i >> 8);

TCNT0L = (unsigned char)i;

/* Restore global interrupt flag */

SREG = sreg;

}

ATtiny261A Scheda tecnica(PDF) 81 Page - ATMEL Corporation

ATtiny261A Scheda tecnica(HTML) 81 Page - ATMEL Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Scheda tecnica Scarica

Link URL