mc68hc908mr32 Freescale Semiconductor, Inc, mc68hc908mr32 Datasheet - Page 273

• Manufacturer Part Number: mc68hc908mr32
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

19.12 CGM Acquisition/Lock Time Specifications
Freescale Semiconductor
Filter capacitor multiply factor
Acquisition mode time factor
Tracking mode time factor
Manual mode time to stable
Manual stable to lock time
Manual acquisition time
Tracking mode entry frequency
tolerance
Acquisition mode entry frequency
tolerance
Lock entry frequency tolerance
Lock exit frequency tolerance
Reference cycles per acquisition mode
measurement
Reference cycles per tracking mode
measurement
Automatic mode time to stable
Automatic stable to lock time
Automatic lock time
PLL jitter (deviation of average bus
frequency over 2 ms)
Description
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
Symbol
C
K
∆
∆
K
∆
∆
n
n
t
t
t
t
ACQ
Lock
ACQ
Lock
FACT
t
t
ACQ
ACQ
ACQ
TRK
Lock
UNL
TRK
TRK
AL
AL
f
J
n
n
ACQ
TRK
±
±
Min
6.3%
0.9%
—
—
—
—
—
—
—
—
—
0
0
/f
0
/f
XCLK
XCLK
(f
(f
(f
(f
XCLK
XCLK
XCLK
XCLK
(8*V
(4*V
(8*V
(4*V
t
t
ACQ
ACQ
0.0154
0.1135
0.0174
Typ
128
—
—
—
—
32
—
*K
*K
DDA
DDA
*K
DDA
DDA
*K
+t
+t
CGM Acquisition/Lock Time Specifications
ACQ)
ACQ)
TRK
AL
TRK
AL
)/
)/
)/
)/
)
)
*(0.025%)
± (f
± 3.6%
± 7.2%
± 0.9%
± 1.8%
*(N/4)
Max
—
—
—
—
—
—
—
—
—
—
—
XCLK
)
If C
If C
If C
If C
freq. mult.
N = VCO
correctly
correctly
correctly
correctly
Notes
F
F
F
F
F/sV
chosen
chosen
chosen
chosen
V
V
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