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Clock Generator Module (CGM)
Technical Data
156
whether the PLL is within the lock mode entry tolerance ∆
Therefore, the acquisition time t
and the acquisition to lock time t
Also, since the average frequency over the entire measurement period
must be within the specified tolerance, the total time usually is longer
than t
as calculated above.
LOCK
In manual mode, it is usually necessary to wait considerably longer than
t
before selecting the PLL clock (see
LOCK
Circuit), because the factors described in
Influences On Reaction Time
Clock Generator Module (CGM)
, is an integer multiple of n
ACQ
, is an integer multiple of n
AL
9.4.3 Base Clock Selector
9.10.2 Parametric
may slow the lock time considerably.
MC68HC908AB32
.
LOCK
/f
,
ACQ
RDV
/f
.
TRK
RDV
Rev. 1.0
—
MOTOROLA
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