ATmega88PA Automotive Atmel Corporation, ATmega88PA Automotive Datasheet - Page 182
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ATmega88PA Automotive
Manufacturer Part Number
ATmega88PA Automotive
Description
Manufacturer
Atmel Corporation
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182
Atmel ATmega48PA/88PA/168PA [Preliminary]
More advanced initialization routines can be made that include frame format as parameters,
disable interrupts and so on. However, many applications use a fixed setting of the baud and
control registers, and for these types of applications the initialization code can be placed
directly in the main routine, or be combined with initialization code for other I/O modules.
Assembly Code Example
C Code Example
Note:
USART_Init:
#define FOSC 1843200 // Clock Speed
#define BAUD 9600
#define MYUBRR FOSC/16/BAUD-1
void main( void )
{
...
...
}
void USART_Init( unsigned int ubrr)
{
}
; Set baud rate
out
out
; Enable receiver and transmitter
ldi
out
; Set frame format: 8data, 2stop bit
ldi
out
ret
USART_Init(MYUBRR)
/*Set baud rate */
UBRR0H = (unsigned char)(ubrr>>8);
UBRR0L = (unsigned char)ubrr;
Enable receiver and transmitter */
UCSR0B = (1<<RXEN0)|(1<<TXEN0);
/* Set frame format: 8data, 2stop bit */
UCSR0C = (1<<USBS0)|(3<<UCSZ00);
1. See
UBRRnH, r17
UBRRnL, r16
r16, (1<<RXENn)|(1<<TXENn)
UCSRnB,r16
r16, (1<<USBSn)|(3<<UCSZn0)
UCSRnC,r16
Section 6. “About Code Examples” on page
(1)
(1)
7.
9223B–AVR–09/11
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