Motorola ColdFire MCF5281 - Manual (Page 190)

Clock Module
9-20 Freescale Semiconductor
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 or PLL 1:1 mode. During PLL 1:1 or
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 will be 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 will be the previous value before entering stop
1–> =current value is 1 until clock is regained but CLK is never expected to regain
Table 9-10. Stop Mode Operation (Sheet 5 of 5)
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
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3