Renesas R8C/Tiny Series User Manual download pdf (Page 24)

5.10. Limitations on peripheral functions

UART1 is used for a communication of the monitor program and the host computer. Do not

use UART1 for a user program.

Also, the following pins should be used for a communication with the host computer. Do not

connect to other pins, etc.

• R8C/24,25 Groups

TxD1 (28pin), RxD1 (29pin)

5.11. Limitations on flag register

When operating the flag register on the user program, execute the FSET instruction and

FCLR instruction not to change the debug flag (D flag).

5.12. Operation on peripheral I/O during break

Although an interrupt cannot be acknowledged during a break, the peripheral I/O continues

operating. For example, when stopping the user program by a break after operating a timer,

the timer continues counting, but the timer interrupt cannot be acknowledge.

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Renesas R8C/Tiny Series User Manual Page 24