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

• Manufacturer Part Number: ATMEGA88-20MU
• Description: IC AVR MCU 8K 20MHZ 5V 32-QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA88-20MU

• 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: 32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
• Package: 32MLF EP
• Device Core: AVR
• Family Name: ATmega
• Maximum Speed: 20 MHz
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 23
• Interface Type: SPI/TWI/USART
• On-chip Adc: 8-chx10-bit
• Number Of Timers: 3
• Processor Series: ATMEGA8x
• Core: AVR8
• Data Ram Size: 1 KB
• Maximum Clock Frequency: 20 MHz
• 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, ATAVRTS2080A, ATASTK512-EK1-IND
• Minimum Operating Temperature: - 40 C
• A/d Inputs: 8-Channel, 10-Bit
• Cpu Speed: 20 MIPS
• Eeprom Memory: 512 Bytes
• Input Output: 23
• Interface: SPI/TWI/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 32-pin MLF
• Programmable Memory: 8K Bytes
• Timers: 2-8-bit, 1-16-bit
• Voltage, Range: 4.5-5.5 V
• Controller Family/series: AVR MEGA
• No. Of I/o's: 23
• Eeprom Memory Size: 512Byte
• Ram Memory Size: 1KB
• No. Of Timers: 3
• Rohs Compliant: Yes
• 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
iv
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