RL78/G10 CHAPTER 12 SERIAL ARRAY UNIT
R01UH0384EJ0311 Rev. 3.11 297
Dec 22, 2016
12.3.12 Serial output register 0 (SO0)
The SO0 register is a buffer register for serial output of each channel.
The value of the SO0n bit of this register is output from the serial data output pin of channel n.
The SO0n bit of this register can be rewritten by software only when serial output is disabled (SOE0n = 0). When serial
output is enabled (SOE0n = 1), rewriting by software is ignored, and the value of the register can be changed only by a
serial communication operation.
To use the pin for serial interface as a port function pin, set the corresponding SO0n bit to 1.
The SO0 register can be set by an 8-bit memory manipulation instruction.
Reset signal generation clears the SO0 register to 03H.
Figure 12-14. Format of Serial Output Register 0 (SO0)
Address: F0128H (SO0) After reset: 03H R/W
Symbol
7 6 5 4 3 2 1 0
SO0 0 0 0 0 0 0 SO01
Note
SO00
SO0n Serial data output of channel n
0 Serial data output value is “0”.
1 Serial data output value is “1”.
Note 16-pin products only.
Caution For 10-pin products, be sure to set bit 1 to 1 and clear bits 2 to 7 to 0.
For 16-pin products, be sure to clear bits 2 to 7 to 0.
Remark n: Channel number (n = 0, 1)
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