Fujitsu F2MC-8FX Hardware Manual page 63

Combinations of Clock Mode and Standby Mode
Table 6.1-4 lists the combinations of clock mode and standby mode and their respective operating states of
internal circuits.
Table 6.1-4 Combinations of Standby Mode and Clock Mode and Internal Operating States
Function
Main
Main
PLL
clock
clock
mode
mode
Main clock Operating
Main PLL Stopped Operat-
clock *1 ing
Subclock Operating*2
CPU Operating
ROM
Operating
RAM
I/O ports Operating
Timebase timer Operating
Watch
Operating*2
prescaler
Watch counter Operating*2
External
Operating
interrupt
Watchdog
Operating
timer
Low-voltage
Operating
detection reset
Other
peripheral Operating
resources
*1: Operates when the main PLL clock oscillation enable bit in the PLL control register (PLLC:MPEN)
is set to "1".
*2: Stops when the subclock oscillation stop bit in the system clock control register (SYCC:SUBS) is set
to "1".
*3: Watch counter keeps counting and no interrupts occur. When the subclock oscillation stop bit in the
system clock control register (SYCC: SUBS) is set to "1", watch counter stops.
RUN
Sub clock mode Main
(Two-system clock
clock product) mode
Stopped Operating
Stopped
Stopped
*1
Operating Operating*2
Operating Stopped
Operating Value held
Operating Output held
Stopped Operating
Operating Operating*2
Operating Operating*2
Operating Operating
Operating Stopped
Operating Operating
Operating Operating
Sleep
Main
Sub clock mode Main
PLL
(Two-system clock
clock
clock product) mode
mode
Stopped
Operat-
Stopped
ing
Operating
Stopped
Value held
Output held
Stopped
Operating
Operating
Operating
Stopped
Operating
Operating
CHAPTER 6 CLOCK CONTROLLER
Watch (Two-
Timebase
system clock
Timer
product)
Main
Sub clock mode
PLL
(Two-system
clock
clock product)
mode
Operating Stopped
Stopped*1 Stopped
Operating*2 Operating
Stopped Stopped
Value held Value held
Output held Output held
Operating Stopped
Operating*2 Operating
Operating*2 Operating
Operating Operating
Stopped Stopped
Operating Operating
Stopped Stopped
Stop
Main PLL clock
mode
Stopped Stopped
Stopped Stopped
Operat-
Stopped
ing*2
Stopped Stopped
Value Value
held held
Output Output
held/ held/Hi-
Hi-Z Z
Stopped Stopped
Operat-
Stopped
ing*2
Operat-
Stopped
ing*3
Operat- Operat-
ing ing
Stopped Stopped
Operat- Operat-
ing ing
Stopped Stopped
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