Fujitsu MB91F109 FR30 Hardware Manual page 52

CHAPTER 1 OVERVIEW
Initialization by power-on reset
Devices contain registers that are initialized only by power-on reset.
registers, turn the power off and turn it on again to execute power-on resetting.
Recovery from sleep or stopped state
To recover from the sleep or stopped state that has been entered from a program in C-bus
RAM, do not use an interrupt but execute resetting.
28
To initialize these