Zilog Z86193 - Manual (Page 36)

Z8
®
CPU
User Manual
UM001604-0108 Clock
29
Crystals and Resonators
Crystals and ceramic resonators, displayed in Figure 18 should have the characteristics
listed in Table 11 to ensure proper oscillator operation.
Figure 17. Circuit Board Design Rules
Table 11. Crystal/Resonator Characteristics
Crystal Cut AT (crystal only)
Mode Parallel, Fundamental mode
Crystal Capacitance < 7 pF
Load Capacitance 10 pF < CL < 220 pF, 15 typical
Resistance 100 Ω max
XTAL2
V
SS
XTAL1
Board Design Example
V
SS
2
3
1
Layout Should
Avoid High
Lighted Areas
Signal Line
20 mm
max
Z8 CPU
Z8
®
CPU
Z8 CPU
C1
C2
3
2
Clock Generator Circuit
Signals A B
Signal C
(Connection to System Group
Must Be Avoided)
(Parallel Traces
Must Be Avoided)
(Top View)