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

IC AVR MCU 4K 20MHZ 5V 32TQFP

ATMEGA48-20AU

Manufacturer Part Number
ATMEGA48-20AU
Description
IC AVR MCU 4K 20MHZ 5V 32TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheets

Specifications of ATMEGA48-20AU

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 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-TQFP, 32-VQFP
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
SMD/SMT
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
Minimum Operating Temperature
- 40 C
On-chip Adc
8-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
Surface Mount
Pin Count
32
Package Type
TQFP
For Use With
ATSTK600-TQFP32 - STK600 SOCKET/ADAPTER 32-TQFPATSTK600-DIP40 - STK600 SOCKET/ADAPTER 40-PDIP770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG770-1005 - ISP 4PORT FOR ATMEL AVR MCU JTAG770-1004 - ISP 4PORT FOR ATMEL AVR MCU SPIATAVRDRAGON - 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

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22 Analog Comparator .............................................................................. 240
23 Analog-to-Digital Converter ................................................................ 243
24 debugWIRE On-chip Debug System .................................................. 259
25 Self-Programming the Flash, ATmega48 ........................................... 261
26 Boot Loader Support – Read-While-Write Self-Programming, ATmega88 and ATmega168
2545S–AVR–07/10
268
21.22-wire Serial Interface Bus Definition ..................................................................208
21.3Data Transfer and Frame Format ........................................................................209
21.4Multi-master Bus Systems, Arbitration and Synchronization ...............................212
21.5Overview of the TWI Module ...............................................................................215
21.6Using the TWI ......................................................................................................217
21.7Transmission Modes ...........................................................................................221
21.8Multi-master Systems and Arbitration ..................................................................234
21.9Register Description ............................................................................................235
22.1Overview ..............................................................................................................240
22.2Analog Comparator Multiplexed Input .................................................................240
22.3Register Description ............................................................................................241
23.1Features ..............................................................................................................243
23.2Overview ..............................................................................................................243
23.3Starting a Conversion ..........................................................................................245
23.4Prescaling and Conversion Timing ......................................................................246
23.5Changing Channel or Reference Selection .........................................................248
23.6ADC Noise Canceler ...........................................................................................249
23.7ADC Conversion Result .......................................................................................254
23.8Register Description ............................................................................................254
24.1Features ..............................................................................................................259
24.2Overview ..............................................................................................................259
24.3Physical Interface ................................................................................................259
24.4Software Break Points .........................................................................................260
24.5Limitations of debugWIRE ...................................................................................260
24.6Register Description ............................................................................................260
25.1Overview ..............................................................................................................261
25.2Addressing the Flash During Self-Programming .................................................262
25.3Register Description ............................................................................................266
26.1Features ..............................................................................................................268
ATmega48/88/168
v

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