EZ80F920120MOD Zilog, EZ80F920120MOD Datasheet - Page 235

• Manufacturer Part Number: EZ80F920120MOD
• Description: MODULE EZ80F92 512K 20MHZ
• Manufacturer: Zilog

Specifications of EZ80F920120MOD

• Module/board Type: Development Module
• Processor Series: EZ80F92x
• Core: eZ80
• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 1 MB
• Interface Type: Cable
• Maximum Clock Frequency: 20 MHz
• Operating Supply Voltage: 0 V to 3.3 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Package / Case: LQFP
• Development Tools By Supplier: eZ80F920200ZCOG
• Minimum Operating Temperature: 0 C
• For Use With/related Products: eZ80F92
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 269-3157; EZ80F920120MOD

On-Chip Oscillators
PS015308-0404
20 MHz Primary Crystal Oscillator Operation
The eZ80F92 device features two on-chip oscillators for use with an external crystal. The
primary oscillator generates the system clock for the internal CPU and the majority of the
on-chip peripherals. Alternatively, the X
input signal. If an external clock generator is used, the X
nected. The secondary oscillator can drive a 32 KHz crystal to generate the time-base for
the Real-Time Clock.
Figure 50 illustrates a recommended configuration for connection with an external
20MHz, fundamental-mode, parallel-resonant crystal. Recommended crystal specifica-
tions are provided in Recommended Crystal Oscillator Specifications (20 MHz Opera-
tion). Resistor R
should add no more than 4pF of stray capacitance to either the X
lation does not occur, reduce the values of capacitors C
Figure 50.Recommended Crystal Oscillator Configuration (20MHz operation)
C = 22 pF
2
X
IN
1
limits total power dissipation by the crystal. Printed circuit board layout
(Fundamental Mode)
On-Chip Oscillator
20 MHz Crystal
P R E L I M I N A R Y
R = 100 KΩ
2
IN
input pin can also accept a CMOS-level clock
X
R = 220 Ω
OUT
1
1
C = 22 pF
OUT
and C
2
pin should be left uncon-
2
to decrease loading.
Product Specification
IN
or X
eZ80F92/eZ80F93
OUT
On-Chip Oscillators
pins. If oscil-
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