m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 383
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m37905
Manufacturer Part Number
m37905
Description
Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.M37905.pdf
(565 pages)
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POWER SAVING FUNCTIONS
16.2 Inactivity of system clock in wait mode
16.2 Inactivity of system clock in wait mode
In the wait mode, if there is not need to operate the internal peripheral devices, setting the system clock
stop select bit at WIT (See Figure 16.1.3.) to “1” makes the following clocks inactive: the operating clocks
for the internal peripheral devices and f
Table 16.2.1 lists the states and operations in the wait mode and after this mode is terminated.
Table 16.2.1 States and operations in wait mode and after this mode is terminated
16-6
Note: This applies when the PLL circuit operation enable bit (bit 1 at address BC
Termination due to
i n t e r r u p t r e q u e s t
occurrence
Oscillation
f
f
Wf
PLL frequency multiplier
Termination due to
hardware reset
sys
1
CPU
to f
, Clock
32
,
, Wf
4096
Timers A, B
Serial I/O
A-D converter
D-A converter
Watchdog timer
Pins
Item
BIU
512
1
,
System clock is active. (bit 3 at address 63
Active.
Operates (Note).
Inactive.
Active.
Inactive.
Operates.
Operates.
Operates.
Operates.
Stopped.
Retains the state at the WIT instruction execution.
Supply of
Operation after hardware reset
CPU
,
7905 Group User’s Manual Rev.1.0
sys
BIU
. This saves the power consumption of the microcomputer.
starts immediately just after termination.
16
= 0)
System clock is inactive. (bit 3 at address 63
Inactive.
Can operate only in the event counter mode.
Can operate only when an external clock is selected.
Stopped.
Stopped.
16
) = “1.”
16
= 1)
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