ATMEGA48-20PU Atmel, ATMEGA48-20PU Datasheet - Page 373

• Manufacturer Part Number: ATMEGA48-20PU
• Description: IC AVR MCU 4K 20MHZ 5V 28DIP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA48-20PU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 23
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 6x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-DIP (0.300", 7.62mm)
• Processor Series: ATMEGA48x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: 2-Wire/SPI/USART/Serial
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 23
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 6-ch x 10-bit
• Cpu Family: ATmega
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 20MHz
• Total Internal Ram Size: 512Byte
• # 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
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Through Hole
• Pin Count: 28
• Package Type: PDIP
• For Use With: ATSTK600-TQFP32 - STK600 SOCKET/ADAPTER 32-TQFPATSTK600 - DEV KIT FOR AVR/AVR32770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVRATAVRISP2 - PROGRAMMER AVR IN SYSTEMATJTAGICE2 - AVR ON-CHIP D-BUG SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2545T–AVR–05/11
22 2-wire serial interface .......................................................................... 209
23 Analog comparator .............................................................................. 241
24 Analog-to-digital converter ................................................................. 244
25 debugWIRE on-chip debug system .................................................... 260
26 Self-programming the flash, Atmel ATmega48 ................................. 262
21.8Register description .............................................................................................206
22.1Features ..............................................................................................................209
22.22-wire serial interface bus definition ....................................................................209
22.3Data transfer and frame format ...........................................................................210
22.4Multi-master bus systems, arbitration and synchronization .................................213
22.5Overview of the TWI module ...............................................................................216
22.6Using the TWI ......................................................................................................218
22.7Transmission modes ...........................................................................................222
22.8Multi-master systems and arbitration ...................................................................235
22.9Register description .............................................................................................236
23.1Overview .............................................................................................................241
23.2Analog comparator multiplexed input ..................................................................241
23.3Register description .............................................................................................242
24.1Features ..............................................................................................................244
24.2Overview .............................................................................................................244
24.3Starting a conversion ...........................................................................................246
24.4Prescaling and conversion timing ........................................................................247
24.5Changing channel or reference selection ............................................................249
24.6ADC noise canceler .............................................................................................250
24.7ADC conversion result .........................................................................................255
24.8Register description .............................................................................................255
25.1Features ..............................................................................................................260
25.2Overview .............................................................................................................260
25.3Physical interface ................................................................................................260
25.4Software break points ..........................................................................................261
25.5Limitations of debugWIRE ...................................................................................261
25.6Register description .............................................................................................261
26.1Overview .............................................................................................................262
26.2Addressing the flash during self-programming ....................................................263
ATmega48/88/168
v