Table 2-4 Sources Of Reset - Fujitsu F2MC-8L Family series Hardware Manual

CPU
HARDWARE CONFIGURATION
(c) Reset
There are four types of reset depending on the source shown in Table 2–4.
Table 2–4 Sources of Reset
Reset name
External-pin reset
Software reset
Watchdog reset
Power-on reset
When the power-on reset or reset during the stop state is used, the
oscillation stabilization time is needed after the oscillator starts operating.
The time-base timer controls this stabilization time. Consequently, the
operation does not start immediately even after canceling the reset.
However, if Power-on reset is not selected by the mask option, no oscillation
stabilization time is required in any state after external pins have been
released from the reset.
Note: A longer time than the optionally-specified oscillation stabilization
time should be allowed for reset at power-on of Power-on reset
unavailable products. In other cases, the time is based on theorist
timing given in the MB89950 SERIES DATA SHEET "AC
characteristics."
2– 14
Description
When setting external-reset pin to Low
When writing 0 at RST (bit 4) of STBC
When watchdog timer overflows
When turning power on