254
Chapter 9
Clock Generator
Preliminary User’s Manual U15839EE1V0UM00
9.4.3 Power Saving Mode Functions
The Clock Controller supports 3 type of standby modes: IDLE, WATCH, STOP. The behaviour of all out-
put clocks is described in the following tables.
Remarks: 1. f
X
: main oscillator frequency
2. f
XX
: SSCG output frequency
3. f
XXP
: PLL output frequency
4. f
XT
: sub oscillator frequency
5. f
PCLK
: peripheral clock frequency
6. N.A.: not available
Note: The functionality of the SSCG or the PLL depends on the setting of the according bit.
Table 9-2:
Power Saving Mode Functions
Macro
Condition
(settings of
impor tant bits)
reset
normal
HALT
IDLE
release
IDLE
STOP
release
STOP
WATCH
release
WATCH
SUB
WATCH
release
SUB
WATCH
Main
Oscillator
OSCDIS=0
on
on
on
on
on
off
on
on
on
off
on
OSCDIS=1
N.A.
off
off
N.A.
N.A.
off
on
N.A.
N.A.
off
off
Sub
Oscillator
SOSTP=1
on
on
on
on
on
off
on
on
on
on
on
SOSTP=0
on
on
on
on
on
on
on
on
on
on
on
SSCG
off
SCEN
Note
SCEN
Note
SCEN
Note
SCEN
Note
off
off
off
off
off
off
PLL
off
PLLEN
Note
PLLEN
Note
PLLEN
Note
PLLEN
Note
off
off
off
off
off
off
CPU
clock
CLS/CKS=000
f
X
f
X
f
X
off
f
X
off
f
X
off
f
X
off
f
X
CLS/CKS=001 N.A.
f
XX
f
XX
off
N.A.
off
N.A.
off
N.A.
off
N.A.
CLS/CKS=01x
N.A.
f
XXP
f
XXP
off
N.A.
off
N.A.
off
N.A.
off
N.A.
CLS/CKS=1xx
N.A.
f
XT
f
XT
off
N.A.
off
N.A.
off
N.A.
off
f
XT
Peripheral
clock
PERIC=0
f
X
f
X
f
X
off
f
X
off
f
X
off
f
X
off
f
X
PERIC=1
N.A.
f
XXP
f
XXP
off
N.A.
off
N.A.
off
N.A.
off
N.A.
TMC
clock
CMODE=0 f
PCLK
f
PCLK
f
PCLK
off
f
PCLK
off
f
PCLK
off
f
PCLK
off
f
PCLK
CMODE=1
N.A.
f
X
f
X
f
X
f
X
off
f
X
f
X
f
X
off
f
X
Port
CLS/CKS=000
f
X
f
X
f
X
f
X
f
X
off
f
X
f
X
f
X
off
f
X
CLS/CKS=001 N.A.
f
XX
f
XX
f
X
N.A.
N.A.
N.A.
f
X
N.A.
N.A.
N.A.
CLS/CKS=01x
N.A.
f
XXP
f
XXP
f
X
N.A.
N.A.
N.A.
f
X
N.A.
N.A.
N.A.
CLS/CKS=1xx
N.A.
f
XT
f
XT
f
X
N.A.
N.A.
N.A.
f
X
N.A.
f
XT
f
XT
Watchdog
WDTSEL=x0
off
f
X
f
X
f
X
f
X
off
f
X
f
X
f
X
off
f
X
WDTSEL=01
N.A.
f
XT
f
XT
f
XT
f
XT
off
f
XT
f
XT
f
XT
f
XT
f
XT
Watch
timer
WTSEL1=0
off
f
X
f
X
f
X
f
X
off
f
X
f
X
f
X
off
f
X
WTSEL1=1
N.A.
f
XT
f
XT
f
XT
f
XT
off
f
XT
f
XT
f
XT
f
XT
f
XT
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