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

• Manufacturer Part Number: ATMEGA88-20PU
• Description: IC AVR MCU 8K 20MHZ 5V 28DIP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA88-20PU

• 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: 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 6x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-DIP (0.300", 7.62mm)
• 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: 6-chx10-bit
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Through Hole
• Pin Count: 28
• Package Type: PDIP
• Processor Series: ATMEGA8x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• 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, ATAVRTS2080A, ATASTK512-EK1-IND
• Minimum Operating Temperature: - 40 C
• Package: 28PDIP
• Family Name: ATmega
• Maximum Speed: 20 MHz
• For Use With: ATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVRATAVRISP2 - PROGRAMMER AVR IN SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

18 SPI – Serial Peripheral Interface ......................................................... 160
19 USART0 ................................................................................................. 170
20 USART in SPI Mode ............................................................................. 198
21 2-wire Serial Interface .......................................................................... 208
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17.6Compare Match Output Unit ................................................................................143
17.7Modes of Operation .............................................................................................144
17.8Timer/Counter Timing Diagrams .........................................................................148
17.9Asynchronous Operation of Timer/Counter2 .......................................................150
17.10Timer/Counter Prescaler ...................................................................................151
17.11Register Description ..........................................................................................152
18.1Features ..............................................................................................................160
18.2Overview ..............................................................................................................160
18.3SS Pin Functionality ............................................................................................165
18.4Data Modes .........................................................................................................165
18.5Register Description ............................................................................................167
19.1Features ..............................................................................................................170
19.2Overview ..............................................................................................................170
19.3Clock Generation .................................................................................................171
19.4Frame Formats ....................................................................................................174
19.5USART Initialization .............................................................................................176
19.6Data Transmission – The USART Transmitter ....................................................178
19.7Data Reception – The USART Receiver .............................................................180
19.8Asynchronous Data Reception ............................................................................184
19.9Multi-processor Communication Mode ................................................................187
19.10Register Description ..........................................................................................189
19.11Examples of Baud Rate Setting .........................................................................193
20.1Features ..............................................................................................................198
20.2Overview ..............................................................................................................198
20.3Clock Generation .................................................................................................198
20.4SPI Data Modes and Timing ................................................................................199
20.5Frame Formats ....................................................................................................200
20.6Data Transfer .......................................................................................................202
20.7AVR USART MSPIM vs. AVR SPI ......................................................................204
20.8Register Description ............................................................................................205
21.1Features ..............................................................................................................208
ATmega48/88/168
2545S–AVR–07/10