Renesas RA Series Quick Design Guide

Renesas RA Family RA4 Quick Design Guide
R01AN5988EU0100 Rev.1.00 Page 21 of 51
Jul.21.21
Figure 15. Equivalent Circuit for External Clock
Note: The frequency of the external clock input can only be changed when the main clock oscillator is
stopped. Do not change the frequency of the external clock input when the setting of the Main Clock
Oscillator Stop bit (MOSCCR.MOSTP) is 0.
6. Reset Requirements and the Reset Circuit
There are fourteen types of resets for Arm
®
Cortex-M4 devices.
Table 11. Arm Cortex-M4 Device Resets
Reset Name
Source
Pin reset
RES# is driven low
Power-on reset
VCC rises (voltage detection: VPOR)
VBATT-selected voltage
power-on reset
VCC falls (voltage detection: VDETBATT)
Independent watchdog timer reset
The independent watchdog timer underflows, or a refresh occurs
Watchdog timer reset
The watchdog timer underflows, or a refresh occurs
Voltage monitor 0 reset
VCC falls (voltage detection Vdet0)
Voltage monitor 1 reset
VCC falls (voltage detection Vdet1)
Voltage monitor 2 reset
VCC falls (voltage detection Vdet2)
SRAM parity error reset
SRAM parity error detection
SRAM ECC error reset
SRAM ECC error detection
Bus master MPU error reset
Bus master MPU error detection
Bus slave MPU error reset
Bus slave MPU error detection
Stack pointer error reset
Stack pointer error detection
Software reset
Register setting

Renesas RA Series Specifications

General

Brand	Renesas
Model	RA Series
Category	Microcontrollers
Language	English