ATMEGA328-MU Atmel, ATMEGA328-MU Datasheet - Page 561

• Manufacturer Part Number: ATMEGA328-MU
• Description: IC MCU AVR 32K FLASH 32QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA328-MU

• 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: 32KB (16K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2K 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-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
• Processor Series: ATMEGA32x
• Core: AVR
• Data Bus Width: 8 bit
• Data Ram Size: 2 KB
• Interface Type: 2-Wire, SPI, USART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 23
• Number Of Timers: 3
• Operating Supply Voltage: 1.8 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• Operating Temperature Range: - 40 C to + 85 C
• Processor To Be Evaluated: ATMEGA328
• Supply Current (max): 0.2 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8271C–AVR–08/10
18 SPI – Serial Peripheral Interface ......................................................... 167
19 USART0 ................................................................................................. 177
20 USART in SPI Mode ............................................................................. 205
ATmega48A/48PA/88A/88PA/168A/168PA/328/328
17.1Features ..............................................................................................................145
17.2Overview .............................................................................................................145
17.3Timer/Counter Clock Sources .............................................................................146
17.4Counter Unit ........................................................................................................146
17.5Output Compare Unit ..........................................................................................147
17.6Compare Match Output Unit ................................................................................149
17.7Modes of Operation .............................................................................................150
17.8Timer/Counter Timing Diagrams .........................................................................154
17.9Asynchronous Operation of Timer/Counter2 .......................................................156
17.10Timer/Counter Prescaler ...................................................................................157
17.11Register Description ..........................................................................................159
18.1Features ..............................................................................................................167
18.2Overview .............................................................................................................167
18.3SS Pin Functionality ............................................................................................172
18.4Data Modes .........................................................................................................172
18.5Register Description ............................................................................................174
19.1Features ..............................................................................................................177
19.2Overview .............................................................................................................177
19.3Clock Generation .................................................................................................178
19.4Frame Formats ....................................................................................................181
19.5USART Initialization ............................................................................................183
19.6Data Transmission – The USART Transmitter ....................................................184
19.7Data Reception – The USART Receiver .............................................................187
19.8Asynchronous Data Reception ............................................................................191
19.9Multi-processor Communication Mode ................................................................194
19.10Examples of Baud Rate Setting ........................................................................195
19.11Register Description ..........................................................................................200
20.1Features ..............................................................................................................205
20.2Overview .............................................................................................................205
20.3Clock Generation .................................................................................................205
20.4SPI Data Modes and Timing ...............................................................................206
20.5Frame Formats ....................................................................................................207
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