RL78/F13, F14 CHAPTER 15 SERIAL ARRAY UNIT
R01UH0368EJ0210 Rev.2.10 822
Dec 10, 2015
15.3.15 Input switch control register (ISC)
The ISC0 bit of the ISC register is used to realize a LIN-bus communication operation by UART0. Set the ISC0 bit
at the same time as setting the TIS17 and TIS16 bits in the TIS1 register (timer input select register 1).
When bit 0 is set to 1, the input signal of the serial data input (R
XD0) pin is selected as an external interrupt (INTP0)
that can be used to detect a wakeup signal by an INTP0 interrupt.
Set the ISC register by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation clears the ISC register to 00H.
Figure 15-18. 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 ISC3 ISC2 0 ISC0
ISC3 Switching external input (INTP12)
0 Uses the input signal of the INTP12 pin as an external interrupt input.
1 Uses the input signal of the LRxD1 pin as an external interrupt input.
ISC2 Switching external input (INTP11)
0 Uses the input signal of the INTP11 pin as an external interrupt input.
1 Uses the input signal of the LRxD0 pin as an external interrupt input.
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 4 and 1 to 0.
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