RL78/G10 CHAPTER 6 TIMER ARRAY UNIT
R01UH0384EJ0311 Rev. 3.11 134
Dec 22, 2016
6.3.13 Input switch control register (ISC)
The ISC register is used to implement baud rate correction by using channel 1 in association with the serial array unit.
When the ISC1 bit is set to 1, the input signal of the serial data input (RxD0) pin is selected as a timer input (TI01).
The width at the baud rate (transfer rate) of the other party in communications can be measured by using the timer
array unit input pulse interval measurement mode with the input edge signal of the start bit as a trigger.
The ISC register can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation clears this register to 00H.
Figure 6-21. Format of Input Switch Control Register (ISC)
Address: F0073H After reset: 00H R/W
Symbol 7 6 5 4 3 2 1 0
ISC 0 0 0 0 0 0 ISC1 ISC0
ISC1
Switching channel 1 input of timer array unit
0
Uses the input signal of the TI01 pin as a timer input (normal operation).
1
Uses the input signal of the R
XD0 pin as a timer input
(detects the wakeup signal and measures the pulse width for baud rate correction).
ISC0
Switching external interrupt (INTP0) input
0
Uses the input signal of the INTP0 pin as an external interrupt (normal operation).
1
Uses the input signal of the R
XD0 pin as an external interrupt (wakeup signal detection).
Caution Be sure to clear bits 7 to 2 to 0.
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