ATMEGA328P-20PU Atmel, ATMEGA328P-20PU Datasheet - Page 413
ATMEGA328P-20PU
Manufacturer Part Number
ATMEGA328P-20PU
Description
Manufacturer
Atmel
Datasheet
1.ATMEGA328P-20PU.pdf
(419 pages)
Specifications of ATMEGA328P-20PU
Cpu Family
ATmega
Device Core
AVR
Device Core Size
8b
Frequency (max)
20MHz
Interface Type
SPI/TWI/USART
Program Memory Type
Flash
Program Memory Size
32KB
Total Internal Ram Size
2KB
# 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
6-chx10-bit
Instruction Set Architecture
RISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Through Hole
Pin Count
28
Package Type
PDIP
Lead Free Status / Rohs Status
Compliant
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8025K–AVR–10/09
9
10 System Control and Reset .................................................................... 46
11 Interrupts ................................................................................................ 57
12 External Interrupts ................................................................................. 67
Power Management and Sleep Modes ................................................. 39
8.8External Clock .........................................................................................................34
8.9Clock Output Buffer .................................................................................................35
8.10Timer/Counter Oscillator .......................................................................................35
8.11System Clock Prescaler ........................................................................................35
8.12Register Description ..............................................................................................37
9.1Sleep Modes ...........................................................................................................39
9.2BOD Disable ............................................................................................................40
9.3Idle Mode .................................................................................................................40
9.4ADC Noise Reduction Mode ...................................................................................40
9.5Power-down Mode ..................................................................................................41
9.6Power-save Mode ...................................................................................................41
9.7Standby Mode .........................................................................................................41
9.8Extended Standby Mode .........................................................................................41
9.9Power Reduction Register .......................................................................................42
9.10Minimizing Power Consumption ............................................................................42
9.11Register Description ..............................................................................................44
10.1Resetting the AVR .................................................................................................46
10.2Reset Sources .......................................................................................................46
10.3Power-on Reset .....................................................................................................47
10.4External Reset .......................................................................................................48
10.5Brown-out Detection ..............................................................................................48
10.6Watchdog System Reset .......................................................................................49
10.7Internal Voltage Reference ....................................................................................49
10.8Watchdog Timer ....................................................................................................50
10.9Register Description ..............................................................................................54
11.1Interrupt Vectors in ATmega48P ...........................................................................57
11.2Interrupt Vectors in ATmega88P ...........................................................................59
11.3Interrupt Vectors in ATmega168P .........................................................................62
11.4Register Description ..............................................................................................65
12.1Pin Change Interrupt Timing .................................................................................67
12.2Register Description ..............................................................................................68
ATmega48P/88P/168P
ii
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