MC68HC08AS32 Datasheet, PDF (271/280 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

17.10 CGM Acquisition/Lock Time Information
Description
Filter capacitor multiply factor
Acquisition mode time factor
Tracking mode time factor
Manual mode time to stable⁽¹⁾
Manual stable to lock time⁽¹⁾
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⁽¹⁾
Automatic stable to lock time⁽¹⁾
Automatic lock time
Symbol
C_Fact
K_ACQ
K_TRK
t_ACQ
t_AL
t_Lock
∆_TRK
∆_ACQ
∆_Lock
∆_UNL
n_ACQ
n_TRK
t_ACQ
t_AL
t_Lock
Min
—
—
—
—
—
—
0
±6.3%
0
±0.9%
—
—
-n---^A----^C---^Q--
f _XCLK
-n----^T---^R---^K--
f _XCLK
—
Typ
0.0154
0.1135
0.0174
------8-----^×-----V----^D---^D----^A-------
f_XCLK × K_ACQ
------⁴----^×-----V-----^D---^D---^A-------
f_XCLK × K_TRK
t_ACQ + t_AL
—
—
—
—
32
128
------8-----^×-----V----^D---^D----^A-------
f_XCLK × K_ACQ
------⁴----^×-----V-----^D---^D---^A-------
f_XCLK × K_TRK
t_ACQ + t_AL
PLL jitter⁽²⁾
f_J
0
—
1. If C_F chosen correctly
2. Deviation of average bus frequency over 2 ms, N = VCO frequency multiplier
Max
Unit
—
F/sV
—
V
—
V
—
s
—
—
± 3.6%
± 7.2%
± 0.9%
± 1.8%
—
—
—
Sec
Sec
—
—
—
—
Cycles
Cycles
Sec
—
Sec
—
Sec
± f_CRYS × 0.025%
× 2^PN/4
Hz
MC68HC08AS32 — Rev. 4.1
Freescale Semiconductor
Data Sheet
271