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Renesas RL78 Series

Renesas RL78 Series
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RL78/F13, F14 CHAPTER 15 SERIAL ARRAY UNIT
R01UH0368EJ0210 Rev.2.10 967
Dec 10, 2015
Figure 15-126. Flowchart of UART Transmission (in Single-Transmission Mode)
Remark m: Unit number (m = 0, 1), n: Channel number (n = 0), mn = 00, 10
Starting UART communication
Writing 1 to the SSmn bit
Writing transmit data to the
SDRmn register
Writing 1 to the STmn bit
Specify the initial settings while the
SEmn bit of serial channel enable
status register m (SEm) is 0 (operation
is stopped).
SMRmn, SCRmn: Setting communication
SDRmn[15:9]: Setting transfer rate
SOLmn: Setting output data level
SOm, SOEm: Setting output
Transfer end interrupt
g
enerated?
Transmission
No
No
Yes
Yes
Setting the SAUmEN bit of the
PER0 register to 1
Setting operation clock by
the SPSm register
Port manipulation
End of communication
Clearing the SAUmEN bit of the
PER0 register to 0

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