ATMEGA649-16MUR Atmel, ATMEGA649-16MUR Datasheet - Page 388

• Manufacturer Part Number: ATMEGA649-16MUR
• Description: MCU AVR 64KB FLASH 16MHZ 64QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA649-16MUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, LCD, 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: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

iv
ATmega329/3290/649/6490
18 SPI – Serial Peripheral Interface ......................................................... 158
19 USART0 ................................................................................................. 168
20 USI – Universal Serial Interface .......................................................... 195
21 Analog Comparator ............................................................................. 207
22 Analog to Digital Converter ................................................................ 211
17.10
17.11
18.1
18.2
18.3
18.4
18.5
19.1
19.2
19.3
19.4
19.5
19.6
19.7
19.8
19.9
19.10
19.11
20.1
20.2
20.3
20.4
20.5
21.1
21.2
21.3
22.1
22.2
22.3
Timer/Counter Prescaler ...............................................................................152
Register Description ......................................................................................153
Features ........................................................................................................158
Overview ........................................................................................................158
SS Pin Functionality ......................................................................................163
Data Modes ...................................................................................................164
Register Description ......................................................................................165
Features ........................................................................................................168
Overview ........................................................................................................168
Clock Generation ...........................................................................................169
Frame Formats ..............................................................................................172
USART Initialization .......................................................................................173
Data Transmission – The USART Transmitter ..............................................175
Data Reception – The USART Receiver .......................................................177
Asynchronous Data Reception ......................................................................181
Multi-processor Communication Mode ..........................................................185
Examples of Baud Rate Setting .....................................................................186
Register Description ......................................................................................190
Features ........................................................................................................195
Overview ........................................................................................................195
Functional Descriptions .................................................................................196
Alternative USI Usage ...................................................................................202
Register Descriptions ....................................................................................203
Overview ........................................................................................................207
Analog Comparator Multiplexed Input ...........................................................208
Register Description ......................................................................................209
Features ........................................................................................................211
Operation .......................................................................................................212
Starting a Conversion ....................................................................................213
2552K–AVR–04/11