Motorola MC68HC908AB32 - CGM AcquisitionLock Time Information

Electrical Specifications
Technical Data MC68HC908AB32 — Rev. 1.0
384 Electrical Specifications MOTOROLA
23.12.3 CGM Acquisition/Lock Time Information
Description
(1)
Notes:
1. V
DD
= 5.0 Vdc ± 10%, V
SS
= 0 Vdc, T
A
= T
L
to T
H
, unless otherwise noted.
Symbol Min Typ Max Notes
Manual mode time to stable
t
ACQ
—
(8 × V
DDA
)/(f
XCLK
× K
ACQ)
—
If C
F
chosen
correctly
Manual stable to lock time
t
AL
—
(4 × V
DDA
)/(f
XCLK
× K
TRK
)
—
If C
F
chosen
correctly
Manual acquisition time
t
Lock
—
t
ACQ
+t
AL
—
Tracking mode entry
frequency tolerance
D
TRK
0—± 3.6%
Acquisition mode entry
frequency tolerance
D
UNT
± 6.3% — ± 7.2%
LOCK entry freq. tolerance
D
LOCK
0—± 0.9%
LOCK exit freq. tolerance
D
UNL
± 0.9% — ± 1.8%
Reference cycles per
Acquisition mode
measurement
n
ACQ
—32—
Reference cycles per
Tracking mode
measurement
n
TRK
— 128 —
Automatic mode time
to stable
t
ACQ
n
ACQ
/f
XCLK
(8 × V
DDA
)/(f
XCLK
× K
ACQ)
If C
F
Chosen
Correctly
Automatic stable to lock time
t
AL
n
TRK
/f
XCLK
(4 × V
DDA
)/(f
XCLK
× K
TRK
)
—
If C
F
Chosen
Correctly
Automatic lock time
t
Lock
—
t
ACQ
+ t
AL
—
PLL jitter, deviation of
average bus frequency
over 2 ms
0—
± (f
CRYS
)
× (.025%)
× (N/4)
N = VCO
Freq. Mult.
(GBNT)
(2)
2. GBNT guaranteed but not tested.