Z8 Encore! XP® F08xA Series
Product Specification
166
tal specifications are provided in Table 103. Resistor R1 is optional and limits total power
dissipation by the crystal. Printed circuit board layout must add no more than 4pF of stray
capacitance to either the XIN or XOUT pins. If oscillation does not occur, reduce the values
of capacitors C1 and C2 to decrease loading.
On-Chip Oscillator
XIN
XOUT
R1 = 220Ω
Crystal
C1 = 39pF
C2 = 39pF
Figure 25.Recommended 20 MHz Crystal Oscillator Configuration
Table 103. Recommended Crystal Oscillator Specifications
Parameter
Frequency
Resonance
Mode
Value
Units
Comments
20
MHz
Parallel
Fundamental
Series Resistance (R )
60
30
7
W
pF
Maximum
Maximum
Maximum
Maximum
S
Load Capacitance (C )
L
Shunt Capacitance (C )
pF
0
Drive Level
1
mW
PS024705-0405
P R E L I M I N A R Y
Crystal Oscillator
ZILOG [ ZILOG, INC. ]
