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Chapter 6
Clock Generator
User’s Manual U16702EE3V2UD00
(3)
Power save mode register (PSMR)
This is an 8-bit register that controls the operation status in the power save mode and the clock
operation.
This register can be read or written in 8-bit or 1-bit units. Be sure to clear bits 2 to 7 of the PSMR
register to 0.
Figure 6-4:
Power Save Mode Register (PSMR) Format
Caution:
The PSM0 and PSM1 bits are valid only when the STP bit of the PSC register is 1.
Remark:
IDLE1:
In this mode, all operations except the oscillator operation, flash memory, and PLL
are stopped. After the IDLE1 mode is released, the normal mode do not need to
wait the lapse of the oscillation stabilization time.
IDLE2:
In this mode, all operations except the oscillator and flash memory operation are
stopped. After the IDLE2 mode is released, the normal mode is returned to
following the lapse of the setup time (flash memory, PLL) specified by the OSTS
register.
STOP:
In this mode, all operations are stopped, except the ring oscillator operation.
After the STOP mode is released, the normal mode is returned to following the
lapse of the oscillation stabilization time specified by the OSTS register.
Note:
Refer to
Chapter 18
”Standby Function” on page 723
to get information about standby
mode release.
Symbol
7
6
5
4
3
2
1
0
Address
After reset
PSMR
0
0
0
0
0
0
PSM1
PSM0
FFFFF820H
00H
R/W
R/W
R
R/W
R/W
R
R
R/W
R/W
PSM1
PSM0
Software standby mode select
0
0
IDLE1 mode
0
1
STOP mode
1
0
IDLE2 mode
1
1
Setting prohibited
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