Z8F082ASH020SC Datasheet, PDF (184/244 Pages) Zilog, Inc. – Z8 Encore XP-R F08xA Series with eXtended Peripherals

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 X_IN or X_OUT pins. If oscillation does not occur, reduce the values
of capacitors C₁ and C₂ to decrease loading.
On-Chip Oscillator
XIN
C1 = 39pF
Crystal
XOUT
R1 = 220Ω
C2 = 39pF
Figure 25.Recommended 20 MHz Crystal Oscillator Configuration
Table 103. Recommended Crystal Oscillator Specifications
Parameter
Value
Frequency
20
Resonance
Parallel
Mode
Fundamental
Series Resistance (R_S)
60
Load Capacitance (C_L)
30
Shunt Capacitance (C₀)
7
Drive Level
1
Units
MHz
W
pF
pF
mW
Comments
Maximum
Maximum
Maximum
Maximum
PS024705-0405
PRELIMINARY
Crystal Oscillator