Renesas RX Series - Wakeup from Software Standby Mode by an Interrupt through the Event Link Controller (ELC); Usage Notes; Notes on Transition to Software Standby Mode

R01UH0823EJ0100 Rev.1.00 Page 819 of 1823
Jul 31, 2019
RX23W Group 29. Low-Power Timer (LPT)
29.4 Wakeup from Software Standby Mode by an Interrupt through the Event Link
Controller (ELC)
The low-power timer generates an event signal upon LPT compare match 0 to the event link controller (ELC) only in
software standby mode.
Setting the ELOPC.LPTMD[1:0] bits to 00b (output the compare match event to ICU as an interrupt request) and the
ELSR8 register to 32h (LPT compare match) leads to the generation of an interrupt from the event signal, and the MCU
returns from software standby mode to normal operating mode.
29.5 Usage Notes
29.5.1 Notes on Transition to Software Standby Mode
When the MCU is to re-enter to software standby mode after returning from software standby mode to normal operating
mode, wait for at least one cycle of the clock selected by the LPTCR1.LPCNTCKSEL bit before executing the WAIT
instruction.