ATMEGA163 ATMEL [ATMEL Corporation], ATMEGA163 Datasheet - Page 91

• Manufacturer Part Number: ATMEGA163
• Description: 8-bit Microcontroller with 16K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

1142E–AVR–02/03
address
wait2:in
wait3:in
wait4:in
;<send more data bytes if needed>
ldi
out
ldi
out
brne ERROR
sbrs
rjmp
in
cpi
brne
ldi
out
ldi
out
sbrs
rjmp
in
cpi
brne
ldi
out
ldi
out
sbrs
rjmp
in
cpi
brne
ldi
out
r16, 0xc8
TWDR, r16
r16, (1<<TWINT) | (1<<TWEN)
TWCR, r16
r16, TWCR
r16, TWINT ; SLA+W has been transmitted, and ACK/NACK has
wait2
r16, TWSR
r16, MT_SLA_ACK; different from MT_SLA_ACK, go to ERROR
ERROR
r16, 0x33
TWDR, r16
r16, (1<<TWINT) | (1<<TWEN)
TWCR, r16 ; Clear TWINT bit in TWCR to start transmission of data
r16, TWCR ; Wait for TWINT flag set. This indicates that
r16, TWINT; data has been transmitted, and ACK/NACK has
wait3
r16, TWSR ; Check value of TWI Status Register. If status
r16, MT_DATA_ACK ; different from MT_DATA_ACK, go to ERROR
ERROR
r16, 0x44 ; Load data (here, data = 0x44) into TWDR Register
TWDR, r16
r16, (1<<TWINT) | (1<<TWEN)
TWCR, r16 ; Clear TWINT bit in TWCR to start transmission of data
r16, TWCR ; Wait for TWINT flag set. This indicates that
r16, TWINT; data has been transmitted, and ACK/NACK has
wait4
r16, TWSR ; Check value of TWI Status Register. If status
r16, MT_DATA_ACK; different from MT_DATA_ACK, go to ERROR
ERROR
r16, (1<<TWINT) | (1<<TWSTO) | (1<<TWEN)
TWCR, r16 ; Transmit STOP condition
; been received
; been received
; Load SLA+W into TWDR Register
; Clear TWINT bit in TWCR to start transmission of
; Wait for TWINT Flag set. This indicates that
; been received
; Check value of TWI Status Register. If status
; Load data (here, data = 0x33) into TWDR Register
ATmega163(L)
91