Datasheet

Electrical Specifications
MC68HC908LJ12 — Rev. 2.1 Technical Data
Freescale Semiconductor Electrical Specifications 401
23.14 Timer Interface Module Characteristics
23.15 CGM Electrical Specifications
Characteristic Symbol Min Max Unit
Input capture pulse width
t
TIH
, t
TIL
1—
t
CYC
Characteristic Symbol Min Typ Max Unit
Reference frequency
f
RDV
30 32.768 100 kHz
Range nominal multiplies
f
NOM
— 38.4 — kHz
VCO center-of-range frequency
f
VRS
38.4k — 40.0M Hz
VCO range linear range multiplier L 1 — 255
VCO power-of-two-range multiplier
2
E
1—4
VCO multiply factor N 1 — 4095
VCO prescale multiplier
2
P
1—8
Reference divider factor R 1 1 15
VCO operating frequency
f
VCLK
38.4k — 40.0M Hz
Manual acquisition time
t
LOCK
——50ms
Automatic lock time
t
LOCK
——50ms
PLL jitter
(1)
Notes:
1. Deviation of average bus frequency over 2ms. N = VCO multiplier.
f
J
0—
f
RCLK
×
0.025% ×
2
P
N/4
Hz