ATMEGA168-15AZ Atmel, ATMEGA168-15AZ Datasheet - Page 262

• Manufacturer Part Number: ATMEGA168-15AZ
• Description: MCU AVR 16K FLASH 15MHZ 32-TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA168-15AZ

• Package / Case: 32-TQFP, 32-VQFP
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Speed: 16MHz
• Number Of I /o: 23
• Eeprom Size: 512 x 8
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Program Memory Size: 16KB (16K x 8)
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Connectivity: I²C, SPI, UART/USART
• Core Size: 8-Bit
• Cpu Family: ATmega
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 16MHz
• Interface Type: 2-Wire/USART/Serial
• Total Internal Ram Size: 1KB
• # I/os (max): 23
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• On-chip Adc: 8-chx10-bit
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 32
• Package Type: TQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

262
ATmega48/88/168 Automotive
Rdloop:
Return:
not ready yet
Do_spm:
Wait_spm:
Wait_ee:
rcall
;
ldi
ldi
subi
sbci
lpm
ld
cpse
rjmp
sbiw
brne
;
;
in
sbrs
ret
;
ldi
rcall
rjmp
;
in
sbrc
rjmp
;
;
in
cli
;
sbic
rjmp
;
out
spm
;
out
ret
read back and check, optional
return to RWW section
verify that RWW section is safe to read
re-enable the RWW section
check for previous SPM complete
input: spmcrval determines SPM action
disable interrupts if enabled, store status
check that no EEPROM write access is present
SPM timed sequence
restore SREG (to enable interrupts if originally enabled)
Do_spm
looplo, low(PAGESIZEB);init loop variable
loophi, high(PAGESIZEB);not required for PAGESIZEB<=256
YL, low(PAGESIZEB)
YH, high(PAGESIZEB)
r0, Z+
r1, Y+
r0, r1
Error
loophi:looplo, 1
Rdloop
temp1, SPMCSR
temp1, RWWSB
spmcrval, (1<<RWWSRE) | (1<<SELFPRGEN)
Do_spm
Return
temp1, SPMCSR
temp1, SELFPRGEN
Wait_spm
temp2, SREG
EECR, EEPE
Wait_ee
SPMCSR, spmcrval
SREG, temp2
;restore pointer
;use subi for PAGESIZEB<=256
; If RWWSB is set, the RWW section is
7530I–AVR–02/10