RL78/F13, F14 CHAPTER 15 SERIAL ARRAY UNIT
R01UH0368EJ0210 Rev.2.10 937
Dec 10, 2015
Figure 15-105. Flowchart of Slave Transmission (in Continuous Transmission Mode)
Starting CSI communication
Port manipulation
Setting the SAU1EN and SAU0EN bits of the
PER0 register to 1
Setting transfer rate with the SPSm register
No
Buffer empty interrupt
generated?
Writing 1 to the SSmn bit
Writing transmit data to the SDRmn register
Setting the SAU1EN and SAU0EN bits of the
PER0 register to 0
End of communication
Yes
TSFmn = 1?
Transfer end interrupt
generated?
No
No
Yes
No
Writing 1 to the MDmn0 bit
Yes <5>
Communication continued?
Writing 1 to the STmn bit
Yes
<4>
No
<6>
Yes
Transmitting next data?
Writing 0 to the MDmn0 bit
Specify the initial settings while
the SEmn bit is 0.
<1> Select buffer empty interrupt.
SMRmn, SCRmn: Setting communication
SDRmn[15:9]: Setting 0000000B
SOm, SOEm: Setting output
<3>
<2>
Remarks 1. <1> to <6> in the figure correspond to <1> to <6> in Figure 15-104 Timing Chart of Slave
Transmission (in Continuous Transmission Mode).
2. m: Unit number (m = 0, 1), n: Channel number (n = 0, 1), p: CSI number (p = 00, 01, 10, 11),
mn = 00, 01, 10, 11
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