ATMEGA88-20MUR Atmel, ATMEGA88-20MUR Datasheet - Page 372

• Manufacturer Part Number: ATMEGA88-20MUR
• Description: MCU AVR 8K FLASH 20MHZ 32QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA88-20MUR

• 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: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K 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: *
• Cpu Family: ATmega
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 20MHz
• Interface Type: SPI/TWI/USART
• Total Internal Ram Size: 1KB
• # 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: 8-chx10-bit
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 32
• Package Type: MLF EP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2545T–AVR–05/11
19 SPI – Serial peripheral interface ......................................................... 161
20 USART0 ................................................................................................. 171
21 USART in SPI mode ............................................................................. 199
18.3Timer/counter clock sources ...............................................................................141
18.4Counter unit .........................................................................................................141
18.5Output compare unit ............................................................................................142
18.6Compare match output unit .................................................................................144
18.7Modes of operation ..............................................................................................145
18.8Timer/counter timing diagrams ............................................................................149
18.9Asynchronous operation of Timer/Counter2 ........................................................151
18.10Timer/counter prescaler ....................................................................................152
18.11Register description ...........................................................................................153
19.1Features ..............................................................................................................161
19.2Overview .............................................................................................................161
19.3SS pin functionality ..............................................................................................166
19.4Data modes .........................................................................................................166
19.5Register description .............................................................................................168
20.1Features ..............................................................................................................171
20.2Overview .............................................................................................................171
20.3Clock generation .................................................................................................172
20.4Frame formats .....................................................................................................175
20.5USART initialization .............................................................................................176
20.6Data transmission – The USART transmitter ......................................................179
20.7Data reception – The USART receiver ................................................................181
20.8Asynchronous data reception ..............................................................................185
20.9Multi-processor communication mode .................................................................188
20.10Register description ...........................................................................................190
20.11Examples of baud rate setting ...........................................................................194
21.1Features ..............................................................................................................199
21.2Overview .............................................................................................................199
21.3Clock generation .................................................................................................199
21.4SPI data modes and timing .................................................................................200
21.5Frame formats .....................................................................................................201
21.6Data transfer ........................................................................................................203
21.7AVR USART MSPIM vs. AVR SPI ......................................................................205
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