CHAPTER 10 SERIAL INTERFACE FUNCTION
User’s Manual U15195EJ5V0UD
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10.4.6 Dedicated baud rate generator 3 (BRG3)
(1) Configuration of baud rate generator 3 (BRG3)
Dedicated baud rate generator output or the internal system clock (f
XX
) can be selected for the CSI0 and CSI1
serial clocks.
The serial clock source is specified by registers CSIC0 and CSIC1.
If dedicated baud rate generator output is specified, BRG3 is selected as the clock source.
Since the same serial clock can be shared for transmission and reception, baud rate is the same for both
transmission and reception.
Figure 10-35. Block Diagram of Baud Rate Generator 3 (BRG3)
BGCS1, BGCS0
PRSCM3
Match detector
1/2
CSIn
8-bit timer counter
f
XX
/4
f
XX
/8
f
XX
/16
f
XX
/32
Selector
Remark
f
XX
: Internal system clock
n = 0, 1