Clock Module
MCF52235 ColdFire® Integrated Microcontroller Reference Manual, Rev. 6
Freescale Semiconductor
7-21
SCM
1
0
0
On On 1
—
—
SCM
0
0
1
Lose reference
clock
SCM
Note:
PLL = PLL enabled during STOP mode. PLL = On when STPMD[1:0] = 00 or 01
OSC = oscillator enabled during STOP mode. Oscillator is on when STPMD[1:0] = 00, 01, or 10
MODES
NRM = normal PLL crystal clock reference or normal PLL external reference. During normal external reference mode, the
oscillator is never enabled. Therefore, during these modes, refer to the OSC = On case regardless of STPMD values.
EXT = external clock mode
REF = PLL reference mode due to losing PLL clock or lock from NRM mode
SCM = PLL self-clocked mode due to losing reference clock from NRM mode
RESET = immediate reset
LOCKS
LK -= expecting previous value of LOCKS before entering stop
0
→
LK = current value is 0 until lock is regained which then is the previous value before entering stop
0
→
= current value is 0 until lock is regained but lock is never expected to regain
LOCS
LC = expecting previous value of LOCS before entering stop
1
→
LC = current value is 1 until clock is regained which then is the previous value before entering stop
1
→
= current value is 1 until clock is regained but CLK is never expected to regain
Table 7-11. Stop Mode Operation (continued)
MODE
In
LO
CEN
LOCRE
LO
LRE
PLL
OSC
FWKUP
Expected
PLL
Action at
Stop
PLL Action
During Stop
MODE
Out
LOCKSS
LO
CK
LO
CS
Comments
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:MCF52234CVM60,
MCF52235CVM60
