ATmega168 Automotive Atmel Corporation, ATmega168 Automotive Datasheet - Page 262

• Manufacturer Part Number: ATmega168 Automotive
• Manufacturer: Atmel Corporation

Specifications of ATmega168 Automotive

• Flash (kbytes): 16 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 23
• Ext Interrupts: 24
• Usb Speed: No
• Usb Interface: No
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 1
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 150
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 3
• Output Compare Channels: 6
• Input Capture Channels: 1
• Pwm Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

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