Z8E00110PSC View Datasheet(PDF) - Zilog
Part Name
Description
MFG CO.
'Z8E00110PSC' PDF : 46 Pages View PDF
Z8E001
Z8Plus OTP Microcontroller
OSCILLATOR OPERATION (Continued)
XTAL1
VSS
Z8E001
XTAL2
RF
RD
ZiLOG
tal/ceramic resonator manufacturer. The RD can be in-
creased to decrease the amount of drive from the oscillator
output to the crystal. It can also be used as an adjustment
to avoid clipping of the oscillator signal to reduce noise. The
RF can be used to improve the start-up of the crystal/ceramic
resonator. The Z8E001 oscillator already has an internal
shunt resistor in parallel to the crystal/ceramic resonator.
C1
C2
Figure 16. Crystal/Ceramic Resonator Oscillator
XTAL1
Z8E001
VSS
N/C
XTAL2
XTAL1
C1
L Z8E001
VSS
XTAL2
C2
Figure 18. External Clock
Figure 16, Figure 17, and Figure 18 recommend that the
load capacitor ground trace connect directly to the VSS
(GND) pin of the Z8E001. This requirement assures that no
system noise is injected into the Z8E001 clock. This trace
should not be shared with any other components except at
the VSS pin of the Z8E001.
Figure 17. LC Clock
In most cases, the RD is 0 Ohms and RF is infinite. These
specifications are determined and specified by the crys-
Note: A parallel resonant crystal or resonator data sheet speci-
fies a load capacitor value that is a series combination of
C1 and C2, including all parasitics (PCB and holder).
24
PRELIMINARY
DS001101-Z8X0400
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