RL78/G1H CHAPTER 14 SERIAL ARRAY UNIT
R01UH0575EJ0120 Rev. 1.20 Page 353 of 920
Dec 22, 2016
14.4.2 Stopping the operation by channels
The stopping of the operation by channels is set using each of the following registers.
Figure 14 - 23 Each Register Setting When Stopping the Operation by Channels
(a) Serial channel stop register m (STm)... This register is a trigger register that is used to enable stopping
communication/count by each channel.
(b) Serial Channel Enable Status Register m (SEm)... This register indicates whether data transmission/
reception operation of each channel is enabled or stopped.
(c) Serial output enable register m (SOEm)... This register is a register that is used to enable or stop output of
the serial communication operation of each channel.
(d) Serial output register m (SOm)... This register is a buffer register for serial output of each channel.
Remark : Setting disabled (set to the initial value)
0/1: Set to 0 or 1 depending on the usage of the user
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STm
0 0 0 0 0 0 0 0 0 0 0 0
STm3
0/1
STm2
0/1
STm1
0/1
STm0
0/1
1: Clears the SEmn bit to 0 and stops the communication operation
* Because the STmn bit is a trigger bit, it is cleared immediately when SEmn = 0.
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SEm
0 0 0 0 0 0 0 0 0 0 0 0
SEm3
0/1
SEm2
0/1
SEm1
0/1
SEm0
0/1
0: Operation stops
* The SEm register is a read-only status register, whose operation is stopped by using the STm register.
With a channel whose operation is stopped, the value of the CKOmn bit of the SOm register can be set by software.
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SOEm
0 0 0 0 0 0 0 0 0 0 0 0
SOEm3
0/1
SOEm2
0/1
SOEm1
0/1
SOEm0
0/1
0: Stops output by serial communication operation
* For channel n, whose serial output is stopped, the SOmn bit value of the SOm register can be set by software.
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SOm
0 0 0 0
CKOm3
0/1
CKOm2
0/1
CKOm1
0/1
CKOm0
0/1 0 0 0 0
SOm3
0/1
SOm2
0/1
SOm1
0/1
SOm0
0/1
1: Serial clock output value is “1” 1: Serial data output value is “1”
* When using pins corresponding to each channel as port function pins, set the corresponding CKOmn, SOmn bits to “1”.
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