CHAPTER 10 SERIAL INTERFACE FUNCTION
User’s Manual U15195EJ5V0UD
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10.3.7 Dedicated baud rate generator 1 (BRG1)
(1) Configuration of baud rate generator 1 (BRG1)
For UART1, the serial clock can be selected from the dedicated baud rate generator output or internal system
clock (f
XX
) for each channel.
The serial clock source is specified by register ASIM10.
If dedicated baud rate generator output is specified, BRG1 is selected as the clock source.
Since the same serial clock can be shared for transmission and reception for one channel, baud rate is the
same for the transmission/reception.
Figure 10-24. Block Diagram of Baud Rate Generator 1 (BRG1)
BGCS1, BGCS0
PRSCM1
Match detector
1/2
UART1
8-bit timer counter
f
XX
/2
f
XX
/4
f
XX
/8
f
XX
/16
Selector
Remark
f
XX
: Internal system clock