MC908AB32CFUE Datasheet, PDF (384/392 Pages) Freescale Semiconductor, Inc – Microcontrollers

Electrical Specifications
23.12.3 CGM Acquisition/Lock Time Information
Description⁽¹⁾
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
± (f_CRYS) N = VCO
0
—
× (.025%) Freq. Mult.
× (N/4)
(GBNT)⁽²⁾
Notes:
1. V_DD = 5.0 Vdc ± 10%, V_SS = 0 Vdc, T_A = T_L to T_H, unless otherwise noted.
2. GBNT guaranteed but not tested.
Technical Data
384
Electrical Specifications
MC68HC908AB32 — Rev. 1.1
Freescale Semiconductor