ATmega168A Atmel Corporation, ATmega168A Datasheet - Page 63
ATmega168A
Manufacturer Part Number
ATmega168A
Description
Manufacturer
Atmel Corporation
Specifications of ATmega168A
Flash (kbytes)
16 Kbytes
Pin Count
32
Max. Operating Frequency
20 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
Yes
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 85
I/o Supply Class
1.8 to 5.5
Operating Voltage (vcc)
1.8 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
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8271D–AVR–05/11
When the BOOTRST Fuse is unprogrammed, the Boot section size set to 2Kbytes and the
IVSEL bit in the MCUCR Register is set before any interrupts are enabled, the most typical and
general program setup for the Reset and Interrupt Vector Addresses in ATmega88A/88PA is:
When the BOOTRST Fuse is programmed and the Boot section size set to 2Kbytes, the most
typical and general program setup for the Reset and Interrupt Vector Addresses in
ATmega88A/88PA is:
When the BOOTRST Fuse is programmed, the Boot section size set to 2Kbytes and the IVSEL
bit in the MCUCR Register is set before any interrupts are enabled, the most typical and general
program setup for the Reset and Interrupt Vector Addresses in ATmega88A/88PA is:
Address Labels Code
0x000
0x001
0x002
0x003
0x004
0x005
;
.org 0xC01
0xC01
0xC02
...
0xC19
Address Labels Code
.org 0x001
0x001
0x002
...
0x019
;
.org 0xC00
0xC00
0xC01
0xC02
0xC03
0xC04
0xC05
Address Labels Code
;
.org 0xC00
0xC00
0xC01
0xC02
...
0xC19
;
0xC1A
RESET: ldi
RESET: ldi
RESET: ldi
ATmega48A/PA/88A/PA/168A/PA/328/P
out
ldi
out
sei
<instr>
rjmp
rjmp
...
rjmp
rjmp
rjmp
...
rjmp
out
ldi
out
sei
<instr>
rjmp
rjmp
rjmp
...
rjmp
r16,high(RAMEND); Main program start
SPH,r16
r16,low(RAMEND)
SPL,r16
EXT_INT0
EXT_INT1
...
SPM_RDY
EXT_INT0
EXT_INT1
...
SPM_RDY
r16,high(RAMEND); Main program start
SPH,r16
r16,low(RAMEND)
SPL,r16
RESET
EXT_INT0
EXT_INT1
...
SPM_RDY
r16,high(RAMEND); Main program start
xxx
xxx
Comments
Comments
; Set Stack Pointer to top of RAM
; Enable interrupts
; IRQ0 Handler
; IRQ1 Handler
;
; Store Program Memory Ready Handler
; IRQ0 Handler
; IRQ1 Handler
;
; Store Program Memory Ready Handler
; Set Stack Pointer to top of RAM
; Enable interrupts
Comments
; Reset handler
; IRQ0 Handler
; IRQ1 Handler
;
; Store Program Memory Ready Handler
63
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