ATMEGA649P-MU Atmel, ATMEGA649P-MU Datasheet - Page 176
ATMEGA649P-MU
Manufacturer Part Number
ATMEGA649P-MU
Description
IC MCU AVR 64K FLASH 64QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA649P-MU
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
54
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)
1.8 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-VFQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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19. USART0
19.1
19.2
8284A–AVR–10/10
Features
Overview
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The Universal Synchronous and Asynchronous serial Receiver and Transmitter (USART) is a
highly flexible serial communication device.
A simplified block diagram of the USART Transmitter is shown in
accessible I/O Registers and I/O pins are shown in bold.
The Power Reduction USART bit, PRUSART0, in
46
Full Duplex Operation (Independent Serial Receive and Transmit Registers)
Asynchronous or Synchronous Operation
Master or Slave Clocked Synchronous Operation
High Resolution Baud Rate Generator
Supports Serial Frames with 5, 6, 7, 8, or 9 Data Bits and 1 or 2 Stop Bits
Odd or Even Parity Generation and Parity Check Supported by Hardware
Data OverRun Detection
Framing Error Detection
Noise Filtering Includes False Start Bit Detection and Digital Low Pass Filter
Three Separate Interrupts on TX Complete, TX Data Register Empty and RX Complete
Multi-processor Communication Mode
Double Speed Asynchronous Communication Mode
ATmega169A/169PA/329A/329PA/649A/649P/3290A/3290PA/6490A/6490P
must be written to zero to enable USART0 module.
”PRR – Power Reduction Register” on page
Figure 19-1 on page
177. CPU
176
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