ATMEGA64A-AU Atmel, ATMEGA64A-AU Datasheet - Page 388

• Manufacturer Part Number: ATMEGA64A-AU
• Description: MCU AVR 64K ISP FLASH 64-TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA64A-AU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 4K 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: 64-TQFP, 64-VQFP
• Package: 64TQFP
• Device Core: AVR
• Family Name: ATmega
• Maximum Speed: 16 MHz
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 53
• Interface Type: SPI/USART
• On-chip Adc: 8-chx10-bit
• Number Of Timers: 4
• Processor Series: ATMEGA64x
• Core: AVR8
• Data Ram Size: 4 KB
• Maximum Clock Frequency: 16 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
• Minimum Operating Temperature: - 40 C
• Cpu Family: ATmega
• Device Core Size: 8b
• Frequency (max): 16MHz
• Total Internal Ram Size: 4KB
• # I/os (max): 53
• Number Of Timers - General Purpose: 4
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 64
• Package Type: TQFP
• For Use With: 770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

20 USART ................................................................................................... 174
21 TWI – Two-wire Serial Interface .......................................................... 201
22 Analog Comparator .............................................................................. 230
23 Analog to Digital Converter ................................................................. 233
8160C–AVR–07/09
19.1
19.2
19.3
19.4
19.5
20.1
20.2
20.3
20.4
20.5
20.6
20.7
20.8
20.9
20.10
20.11
21.1
21.2
21.3
21.4
21.5
21.6
21.7
21.8
21.9
22.1
22.2
23.1
23.2
23.3
23.4
Features ........................................................................................................164
Overview ........................................................................................................164
SS Pin Functionality ......................................................................................169
Data Modes ...................................................................................................169
Register Description ......................................................................................171
Features ........................................................................................................174
Overview ........................................................................................................174
Clock Generation ...........................................................................................176
Frame Formats ..............................................................................................178
USART Initialization .......................................................................................179
Data Transmission – The USART Transmitter ..............................................181
Data Reception – The USART Receiver .......................................................183
Asynchronous Data Reception ......................................................................187
Multi-processor Communication Mode ..........................................................190
Examples of Baud Rate Setting .....................................................................192
Register Description ......................................................................................196
Features ........................................................................................................201
Overview ........................................................................................................201
Two-wire Serial Interface Bus Definition ........................................................203
Data Transfer and Frame Format ..................................................................204
Multi-master Bus Systems, Arbitration and Synchronization .........................207
Using the TWI ................................................................................................209
Transmission Modes .....................................................................................212
Multi-master Systems and Arbitration ............................................................225
TWI Register Description ...............................................................................226
Analog Comparator Multiplexed Input ...........................................................230
Register Description ......................................................................................231
Features ........................................................................................................233
Overview ........................................................................................................233
Operation .......................................................................................................234
Starting a Conversion ....................................................................................235
ATmega64A
iv