EZ80F920120MOD Zilog, EZ80F920120MOD Datasheet - Page 236

• 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

PS015308-0404
32 KHz Real-Time Clock Crystal Oscillator Operation
Table 143. Recommended Crystal Oscillator Specifications (20 MHz Operation)
Figure 51 illustrates a recommended configuration for connecting the Real-Time Clock
oscillator with an external 32 KHz, fundamental-mode, parallel-resonant crystal. The rec-
ommended crystal specifications are provided in Recommended Crystal Oscillator Speci-
fications (32 KHz Operation). A printed circuit board layout should add no more than 4 pF
of stray capacitance to either the RTC_X
occur, reduce the values of capacitors C
An on-chip MOS resistor sets the crystal drive current limit. This configuration does not
require an external bias resistor across the crystal. An on-chip MOS resistor provides the
biasing.
Figure 51.Recommended Crystal Oscillator Configuration (32KHz operation)
Parameter
Frequency
Resonance
Mode
Series Resistance (R
Load Capacitance (C
Shunt Capacitance (C
Drive Level
C = 18 pF
2
RTC_X
IN
S
L
0
)
)
)
(Fundamental Mode)
On-Chip Oscillator
32 MHz Crystal
P R E L I M I N A R Y
Value
20
Parallel
Fundamental
25
20
7
1
1
IN
and C
or RTC_X
2
to decrease loading.
Units
MHz
Ω
pF
pF
mΩ
RTC_X
R = 220 Ω
OUT
1
C = 18 pF
2
OUT
pins. If oscillation does not
Comments
Maximum
Maximum
Maximum
Maximum
Product Specification
eZ80F92/eZ80F93
On-Chip Oscillators
224