MC68HC08AS32 Datasheet, PDF (380/394 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

Electrical Specifications
21.9 CGM Operating Conditions
Characteristic
Crystal Reference Frequency
Range Nominal Multiplier
VCO Center-of-Range Frequency⁽¹⁾
Medium Voltage VCO Center-of-Range Frequency
VCO Frequency Multiplier
VCO Center-of-Range Multiplier
VCO Operating Frequency
1. 5.0 V ± 10% V_DD only
Symbol
f_xclk
f_nom
f_vrs
N
L
f_vclk
Min
Typ
Max
1
—
8
— 4.9152 —
4.9152 —
32.8
4.9152 —
16.4
1
—
15
1
—
15
f_vrsmin
—
f_vrsmax
Unit
MHz
MHz
MHz
MHz
—
—
MHz
21.10 CGM Component Information
Characteristic
Symbol Min
Typ
Max Unit
Crystal (X1) Frequency (MHz)⁽¹⁾
f_xclk
1
4.9152
8
MHz
Crystal Load Capacitance⁽²⁾
C_L
—
—
—
pF
Crystal Fixed Capacitance⁽²⁾
C₁
—
2 × C_L
—
pF
Crystal Tuning Capacitance⁽²⁾
C₂
—
2 × C_L
—
pF
Feedback Bias Resistor
R_B
—
1
—
MΩ
Series Resistor⁽³⁾
R_S
0
—
3.3
kΩ
Filter Capacitor
C_F
—
C_Fact × (V_DDA/f_xclk)
—
pF
Bypass Capacitor⁽⁴⁾
C_byp
—
0.1
—
µF
1. Fundamental mode crystals only
2. Consult crystal manufacturer’s data.
3. Not required
4. C_byp must provide low AC impedance from f = f_xclk/100 to 100 × f_vclk, so series resistance must be considered.
Advance Information
380
Electrical Specifications
MC68HC08AS32 — Rev. 3.0
MOTOROLA