RL78/G15 CHAPTER 6 TIMER ARRAY UNIT
R01UH0959EJ0110 Rev.1.10 Page 198 of 765
Mar 7, 2023
6.3.12 Input switch control register (ISC)
The ISC register is used to implement UART0 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.
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 6-20. 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 RxD0 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 RxD0 pin as an external interrupt (wakeup signal detection).
Caution Be sure to clear bits 7 to 2 to 0.
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