ATMEGA328P-20PU Atmel, ATMEGA328P-20PU Datasheet - Page 416

• Manufacturer Part Number: ATMEGA328P-20PU
• Manufacturer: Atmel

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

8025K–AVR–10/09
21 2-wire Serial Interface .......................................................................... 211
22 Analog Comparator ............................................................................. 243
23 Analog-to-Digital Converter ................................................................ 247
24 debugWIRE On-chip Debug System .................................................. 264
25 Self-Programming the Flash, ATmega48P ........................................ 266
20.8Register Description ............................................................................................208
21.1Features ..............................................................................................................211
21.22-wire Serial Interface Bus Definition ..................................................................211
21.3Data Transfer and Frame Format ........................................................................213
21.4Multi-master Bus Systems, Arbitration and Synchronization ...............................215
21.5Overview of the TWI Module ...............................................................................218
21.6Using the TWI ......................................................................................................220
21.7Transmission Modes ...........................................................................................224
21.8Multi-master Systems and Arbitration ..................................................................237
21.9Register Description ............................................................................................238
22.1Overview .............................................................................................................243
22.2Analog Comparator Multiplexed Input .................................................................243
22.3Register Description ............................................................................................244
23.1Features ..............................................................................................................247
23.2Overview .............................................................................................................247
23.3Starting a Conversion ..........................................................................................249
23.4Prescaling and Conversion Timing ......................................................................250
23.5Changing Channel or Reference Selection .........................................................252
23.6ADC Noise Canceler ...........................................................................................253
23.7ADC Conversion Result ......................................................................................258
23.8Temperature Measurement .................................................................................258
23.9Register Description ............................................................................................259
24.1Features ..............................................................................................................264
24.2Overview .............................................................................................................264
24.3Physical Interface ................................................................................................264
24.4Software Break Points .........................................................................................265
24.5Limitations of debugWIRE ...................................................................................265
24.6Register Description ............................................................................................265
25.1Overview .............................................................................................................266
ATmega48P/88P/168P
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