Renesas rl78 User Manual

 

RL78/G1A 

 

CHAPTER  12   SERIAL  ARRAY  UNIT 

R01UH0305EJ0200  Rev.2.00 

 

 

429  

Jul 04, 2013 

The ISC1 and ISC0 bits of the ISC register are used to realize a LIN-bus communication operation by UART2 in 

coordination with an external interrupt and the timer array unit. 

When bit 0 is set to 1, the input signal of the serial data input (R

X

D2) pin is selected as an external interrupt (INTP0) 

that can be used to detect a wakeup signal. 

When bit 1 is set to 1, the input signal of the serial data input (R

X

D2) pin is selected as a timer input, so that wake up 

signal can be detected, the low width of the break field, and the pulse width of the sync field can be measured by the timer. 

The ISC register can be set by a 1-bit or 8-bit memory manipulation instruction. 

Reset signal generation clears the ISC register to 00H. 

 

 

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 7 input of timer array unit 

0 

48- and 64-pin products:  

Uses the input signal of the TI07 pin as a timer input (normal operation). 

25- and 32-pin products: 

Do not use a timer input signal for channel 7. 

1 

Input signal of the R

X

D2 pin is used as timer input (detects the wakeup signal and measures the low 

width of the break field and the pulse width of the sync field). 

Setting is prohibited in the 25-pin products. 

 

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

X

D2 pin as an external interrupt (wakeup signal detection). 

 

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