Microcontroller User's Manual

MOTOROLA Chapter 9. Clock Module 9-19
Functional Description
NRM 1 0 0 Off Off 0 Lose lock,
f.b. clock,
reference
clock
Regain NRM ‘LK 1 ‘LC REF not entered
during stop;
SCM entered
during stop only
during oscillator
startup
No regain Stuck — — —
NRM 1 0 0 Off On 0 Lose lock,
f.b. clock
Regain NRM ‘LK 1 ‘LC REF mode not
entered during
stop
No f.b. clock or
lock regain
Stuck ———
Lose reference
clock
SCM 0 0 1 Wakeup without
lock
NRM 1 0 0 Off On 1 Lose lock,
f.b. clock
Regain f.b. clock Unstable
NRM
0–>‘L
K
0–>1 ‘LC REF mode not
entered during
stop
No f.b. clock
regain
Stuck ———
Lose reference
clock
SCM 0 0 1 Wakeup without
lock
NRM 1 0 0 On On 0 — — NRM ‘LK 1 ‘LC
Lose reference
clock
SCM 0 0 1 Wakeup without
lock
Lose f.b. clock REF 0 X 1 Wakeup without
lock
Lose lock Stuck — — —
Lose lock, regain NRM 0 1 ‘LC
NRM 1 0 0 On On 1 — — NRM ‘LK 1 ‘LC
Lose reference
clock
SCM 0 0 1 Wakeup without
lock
Lose f.b. clock REF 0 X 1 Wakeup without
lock
Lose lock Unstable
NRM
0 0–>1 ‘LC
NRM 1 0 1 On On X — — NRM ‘LK 1 ‘LC
Lose lock or clock RESET — — — Reset
immediately
Table 9-10. Stop Mode Operation (Sheet 3 of 5)
MODE
In
LOCEN LOCRE
LOLRE
PLL
OSC
FWKUP
Expected
PLL
Action at
Stop
PLL Action
During Stop
MODE
Out
LOCKSS
LOCK
LOCS
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