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AT90PWM2 Scheda tecnica(PDF) 212 Page - ATMEL Corporation

Il numero della parte AT90PWM2
Spiegazioni elettronici  High Performance, Low Power Atmel
PDF  365 Pages
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Produttore elettronici  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT90PWM2 Scheda tecnica(HTML) 212 Page - ATMEL Corporation

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4317K–AVR–03/2013
AT90PWM2/3/2B/3B
19. EUSART (Extended USART)
The Extended Universal Synchronous and Asynchronous serial Receiver and Transmitter
(EUSART) provides functionnal extensions to the USART.
19.1
Features
• Independant bit number configuration for transmit and receive
• Supports Serial Frames with 5, 6, 7, 8, 9 or 13, 14, 15, 16, 17 Data Bits and 1 or 2 Stop Bits
• Biphase Manchester encoder/decoder (for DALI Communications)
• Manchester framing error detection
• Bit ordering (MSB first or LSB first)
19.2
Overview
A simplified block diagram of the EUSART Transmitter is shown in Figure 19-1. CPU accessible
I/O Registers and I/O pins are shown in bold.
Figure 19-1. EUSART Block Diagram
The EUSART is activated with the EUSART bit of EUCSRB register. Until this bit is not set, the
USART will behave as standard USART, all the functionnalities of the EUSART are not
accessible.
PARITY
GENERATOR
UBRR[H:L]
UDR
(Transmit)
EUDR
(Transmit)
UDR
(Receive)
EUDR
(Receive)
UCSRA
UCSRB
UCSRC
EUCSRA
EUCSRB
EUCSRC
BAUD RATE GENERATOR
TRANSMIT SHIFT REGISTER
RECEIVE SHIFT REGISTER
RxD
TxD
PIN
CONTROL
PIN
CONTROL
XCK
DATA
RECOVERY
CLOCK
RECOVERY
PIN
CONTROL
TX
CONTROL
RX
CONTROL
PARITY
CHECKER
MANCHESTER
ENCODER
CLKio
SYNC LOGIC
Clock Generator
Transmitter
Receiver
MANCHESTER
DECODER



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