Fujitsu FR81S Manuel D’Utilisation
CHAPTER 6: CLOCK RESET STATE TRANSITIONS
2. Device States and Transitions
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : CLOCK RESET STATE TRANSITIONS
FUJITSU SEMICONDUCTOR CONFIDENTIAL
5
2.1. Diagram of State Transitions
This section shows diagram of state transitions.
The device state transitions for this series are shown below.
Figure 2-1 Diagram of Device State Transitions
Power on
or Low-voltage
detect
PLL
sleep
PLL
RUN
PLL clock mode
Sub clock mode
Sub
sleep
Main clock mode
Sub
stop
Sub
RUN
Main
sleep
Sub watch
mode
Initialization
(SINIT)
Sub watch
mode
(Shutdown)
Sub stop
(Shutdown)
Main
stop
Main stop
(Shutdown)
Main
watch
mode
Main
RUN
Main
watch mode
(shutdown)
Main
oscillation
wait
Sub
oscillation
wait
Program
reset
(RST)
Main oscillation
stabilization wait
(RESET)
Setting
initialization
(INIT) *1
○
1
Power-on reset or internal low-voltage detection or external reset and simultaneous assert of NMI
○
2
Power-on reset release and internal low-voltage release and external reset and release simultaneous assert of NMI
○
3
End of oscillation stabilization wait
○
4
End of oscillation stabilization wait (if the reset factor is
○
7
or
○
9
)
○
5
INIT release
○
6
RST release
○
7
Software reset/
○
8
Software watchdog reset (including irregular) or software reset (irregular)
○
9
External reset input (NMI disabled ) or external low-voltage detection
○
10
External reset input (NMI disabled + irregular) or external low-voltage detection (irregular)
○
11
Hardware watchdog reset (including irregular)
○
12
Sleep mode (write instruction)
○
13
Stop mode (write instruction)
○
14
Watch mode (write instruction)
○
15
Interrupt (including
○
16
and
○
17
)
○
16
Interrupt (clock not required)/NMI
○
17
Main timer interrupt/Sub timer interrupt/RTC interrupt
○
18
Switch from main to sub (write instruction)
○
19
Switch from sub to main (write instruction)
○
20
Switch from main to PLL (write instruction)
(21) Switch from PLL to main (write instruction)
(22) Illegal standby mode transition
(23) Illegal standby mode transition detection reset
(24) Stop mode and shutdown (write instruction)
(25) Watch mode and shutdown (write instruction)
MB91520 Series
MN705-00010-1v0-E
248