Resetting - Fujitsu F2MC-16LX Hardware Manual

4.4

Resetting

Cancellation of a reset, a read from operation of mode data, and the reset vector can
be selected by setting the mode pin to perform mode fetching. Mode fetching
determines the CPU operation mode and the start address of execution after the end of
a reset. When the power is turned on or when the system is returned from the stop-
mode by a reset, perform mode fetching after the end of the oscillation stabilization
wait time.
I Overview of resetting
Figure 4.4-1 "Flow of resetting" shows the flow of resetting.
Reset in progress
Mode fetching
(reset)
Normal operation
(run state)
I Mode pins
Mode pins (MD2 to MD0) specify a method to fetch reset vectors and mode data. A reset vector
and mode data are fetched in a sequence for resetting. Refer to Section 7.2 "Mode Pins (MD2
to MD0)", for details of the mode pins.
Figure 4.4-1 Flow of resetting
Power-on reset
Stop mode
Sub clock mode
Reset state to wait for
stable oscillation
Fetch of mode data
Fetch of reset vector
Fetch of instruction code
from addresses indicated
by a reset vector, and
execution of instruction
CHAPTER 4 RESET
External reset
Software reset
Watchdog timer reset
Pin state and function changes
related to external bus mode
107