mc68hc908gr8a Freescale Semiconductor, Inc, mc68hc908gr8a Datasheet - Page 247

• Manufacturer Part Number: mc68hc908gr8a
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

19.15 Clock Generation Module Characteristics
19.15.1 CGM Component Specifications
19.15.2 CGM Electrical Specifications
Freescale Semiconductor
Crystal reference frequency
Crystal load capacitance
Crystal fixed capacitance
Crystal tuning capacitance
Feedback bias resistor
Series resistor
Operating voltage
Operating temperature
Crystal reference frequency
Range nominal multiplier
VCO center-of-range frequency
VCO range linear range multiplier
VCO power-of-two range multiplier
VCO multiply factor
VCO prescale multiplier
Reference divider factor
VCO operating frequency
Bus operating frequency (5-V operation)
Bus frequency (3-V operation)
Manual acquisition time
Automatic lock time
PLL jitter
External clock input frequency PLL disabled
External clock input frequency PLL enabled
1. Fundamental mode crystals only
2. Consult crystal manufacturer’s data.
1. Deviation of average bus frequency over 2 ms. N = VCO multiplier.
(1)
Characteristic
(2)
(2)
Description
(2)
(1)
MC68HC908GR8A • MC68HC908GR4A Data Sheet, Rev. 5
Symbol
Symbol
f
f
f
f
f
f
f
t
t
f
f
V
RCLK
VCLK
XCLK
NOM
Lock
Lock
OSC
OSC
VRS
BUS
BUS
T
2
2
N
R
f
DD
L
C
C
C
R
R
J
A
E
P
L
1
2
B
S
Clock Generation Module Characteristics
Min
–40
2.7
Min
—
—
—
—
—
dc
0.5
1
4
1
1
1
1
4
0
1
1
—
—
—
—
1
2 × C
2 × C
38.4
Typ
Typ
25
—
—
—
—
—
—
—
—
—
—
—
—
20
4
1
1
4
4
1
0
L
L
0.025% x
f
32.8 M
2
RCLK
4095
Max
P
125
255
Max
5.5
8.2
4.1
—
40
15
40
10
—
—
—
—
8
4
8
5
5
8
8
N/4
x
MHz
MHz
MHz
MHz
MHz
MHz
MHz
Unit
Unit
kHz
MΩ
ms
ms
Hz
Hz
pF
pF
pF
o
V
Ω
C
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