CHAPTER 10 SERIAL INTERFACE FUNCTION
User’s Manual U12688EJ4V0UM00
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10.4 Dedicated Baud Rate Generators 0 to 2 (BRG0 to BRG2)
10.4.1 Configuration and function
A dedicated baud rate generator output or the internal system clock (
φ
) can be selected for the serial interface
serial clock for each channel.
The serial clock source is specified with the ASIM00 and ASIM10 registers for UART0 and UART1, and with the
CSIM0 to CSIM3 registers for CSI0 to CSI3.
If the dedicated baud rate generator output is specified, BRG0 to BRG2 are selected as the clock source.
Since 1 serial clock is used in common for 1 channel of transmission and reception, the baud rate is the same for
both transmission and for reception.
Figure 10-11. Block Diagram of Dedicated Baud Rate Generator
CSI0
UART0
CSI1
UART1
Clear
Match
BRCE0
BRGC0
TMBRG0
Prescaler
1/2
BPR00 to BPR02
BRG0
BRG1
CSI2
CSI3
BRG2
Internal system
clock
( )
φ
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