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AT90PWM3 데이터시트(PDF) 211 Page - ATMEL Corporation |
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AT90PWM3 데이터시트(HTML) 211 Page - ATMEL Corporation |
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211 / 361 page ![]() 211 4317J–AVR–08/10 AT90PWM2/3/2B/3B • Asynchonous frames – Standard bit level encoded – Manchester bit encoded • Synchronous frames – In this mode only the Standard bit level encoded is available 19.3 Serial Frames A serial frame is defined to be one character of data bits with synchronization bits (start and stop bits), and optionally a parity bit for error checking. 19.3.1 Frame Formats The EUSART allows to receive and transmit serial frame with the following format: • 1 start bit • 5, 6, 7, 8, 9, 13, 14,15,16,17 data bits • data bits and start bit level encoded or Manchester encoded • data transmition MSB or LSB first (bit ordering) • no, even or odd parity bit • 1 or 2 stop bits: – Stop bits insertion for transmition – Stop bits value read access in reception 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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