RL78/G15 CHAPTER 12 SERIAL ARRAY UNIT
R01UH0959EJ0110 Rev.1.10 Page 387 of 765
Mar 7, 2023
12.3.11 Serial output enable register m (SOEm)
The SOEm register is used to enable or stop output of the serial communication operation of each channel.
For channel n whose serial output is enabled, the value of the SOmn bit of serial output register m (SOm) to be
described later cannot be rewritten by software, and a value reflected by a communication operation is output from the
serial data output pin.
For channel n, whose serial output is stopped, the SOmn bit value of the SOm register can be set by software, and that
value can be output from the serial data output pin. In this way, any waveform, such as that of a start condition/stop
condition, can be created by software.
The SOEm register can be set by a 16-bit memory manipulation instruction.
The lower 8 bits of the SOEm register can be set with a 1-bit or 8-bit memory manipulation instruction with SOEmL.
The value of each SOEm register is 0000H following a reset.
Figure 12-13. Format of Serial Output Enable Register m (SOEm)
Address: F012AH, F012BH (SOE0) After reset: 0000H R/W
Symbol 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
SOE0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
SOEmn Serial output enable/stop of channel n
0 Stops output by serial communication operation.
1 Enables output by serial communication operation.
Caution Be sure to clear bits 15 to 2 of the SOE0 register to 0.
Remark m: Unit number (m = 0), n: Channel number (n = 0, 1)
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