MEGA128CAN Datasheet, PDF (194/413 Pages) ATMEL Corporation – Microcontroller WITH 128K BYTES OF ISP FLASH AND CAN CONTROLLER

• 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 UBRRnH is written.
• Bit 11:0 – UBRRn11:0: USARTn Baud Rate Register
This is a 12-bit register which contains the USARTn baud rate. The UBRRnH contains
the four most significant bits, and the UBRRnL contains the eight least significant bits of
the USARTn 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.
194 AT90CAN128
4250E–CAN–12/04