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Motor de Búsqueda de Datasheet de Componentes Electrónicos |
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Motor de Búsqueda de Datasheet de Componentes Electrónicos |
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ATmega64A Datasheet(PDF) 200 Page - ATMEL Corporation |
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ATmega64A Datasheet(HTML) 200 Page - ATMEL Corporation |
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200 / 392 page  200 8160C–AVR–07/09 ATmega64A 20.11.5 UBRRnL and UBRRnH – USART Baud Rate Registers (1) Note: 1. UBRRH is not available in mega103 compatibility mode • Bit 15:12 – Reserved Bits These bits are reserved for future use. For compatibility with future devices, these bit must be written to zero when UBRRH is written. • Bit 11:0 – UBRRn11:0: USART Baud Rate Register This is a 12-bit register which contains the USART baud rate. The UBRRnH contains the four most significant bits, and the UBRRnL contains the eight least significant bits of the USART baud rate. Ongoing transmissions by the Transmitter and Receiver will be corrupted if the baud rate is changed. Writing UBRRnL will trigger an immediate update of the baud rate prescaler. Bit 151413 12 1110 9 8 –––– UBRRn[11:8] UBRRnH UBRRn[7:0] UBRRnL 7654 3210 Read/Write R R R R R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Initial Value 0000 0000 0000 0000 |
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