ATMEGA48A-AU Atmel, ATMEGA48A-AU Datasheet - Page 562

• Manufacturer Part Number: ATMEGA48A-AU
• Description: IC MCU AVR 4K FLASH 32TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA48A-AU

• 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): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-TQFP, 32-VQFP
• Controller Family/series: Atmega
• No. Of I/o's: 23
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 512Byte
• Cpu Speed: 20MHz
• Rohs Compliant: Yes
• Processor Series: ATmega
• Core: AVR
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: TWI, SPI, USART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 23
• Number Of Timers: 3
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8271C–AVR–08/10
21 2-wire Serial Interface .......................................................................... 215
22 Analog Comparator ............................................................................. 247
23 Analog-to-Digital Converter ................................................................ 251
24 debugWIRE On-chip Debug System .................................................. 268
ATmega48A/48PA/88A/88PA/168A/168PA/328/328
20.6Data Transfer ......................................................................................................209
20.7AVR USART MSPIM vs. AVR SPI ......................................................................211
20.8Register Description ............................................................................................212
21.1Features ..............................................................................................................215
21.22-wire Serial Interface Bus Definition ..................................................................215
21.3Data Transfer and Frame Format ........................................................................217
21.4Multi-master Bus Systems, Arbitration and Synchronization ...............................219
21.5Overview of the TWI Module ...............................................................................222
21.6Using the TWI ......................................................................................................224
21.7Transmission Modes ...........................................................................................228
21.8Multi-master Systems and Arbitration ..................................................................241
21.9Register Description ............................................................................................242
22.1Overview .............................................................................................................247
22.2Analog Comparator Multiplexed Input .................................................................247
22.3Register Description ............................................................................................248
23.1Features ..............................................................................................................251
23.2Overview .............................................................................................................251
23.3Starting a Conversion ..........................................................................................253
23.4Prescaling and Conversion Timing ......................................................................254
23.5Changing Channel or Reference Selection .........................................................256
23.6ADC Noise Canceler ...........................................................................................257
23.7ADC Conversion Result ......................................................................................262
23.8Temperature Measurement .................................................................................262
23.9Register Description ............................................................................................263
24.1Features ..............................................................................................................268
24.2Overview .............................................................................................................268
24.3Physical Interface ................................................................................................268
24.4Software Break Points .........................................................................................269
24.5Limitations of debugWIRE ...................................................................................269
24.6Register Description ............................................................................................269
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