Fujitsu FR20 User Manual
55
3.10
Reset Sequence
This section explains the reset when the CPU is the operation state.
■
Reset Factor
The reset factor is as follow.
•
Input from external reset pin
•
Software reset by the SRST bit operation of the standby control register (STCR)
•
Count up of watchdog timer
•
Power on reset
■
Initialization by Reset
The reset factor is generated, the CPU is initialized.
●
Releasing from the external reset pin or software reset
•
The pin is set to the predetermined state.
•
Each resource in the device is put in the reset state. The control register is initialized to the
predetermined value.
•
The lowest gear is selected for the clock.
■
Reset Sequence
When a reset factor is released, the CPU executes the following reset sequence.
•
(000FFFFC
H
)
→ PC
Note:
After reset, operation mode needs to be set by the mode register setting.