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Z86L71 Scheda tecnica(PDF) 41 Page - Zilog, Inc.

Il numero della parte Z86L71
Spiegazioni elettronici  IR/Low-Voltage Microcontroller
PDF  61 Pages
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Produttore elettronici  ZILOG [Zilog, Inc.]
Homepage  http://www.zilog.com
Logo ZILOG - Zilog, Inc.

Z86L71 Scheda tecnica(HTML) 41 Page - Zilog, Inc.

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Z86L70/71/75/C71
Zilog
IR/Low-Voltage Microcontroller
DS97LVO0500
P R E L I M I N A R Y
1-41
1
Power-On Reset (POR). A timer circuit clocked by a ded-
icated on-board RC oscillator is used for the Power-On Re-
set (POR) timer function. The POR time allows VCC and
the oscillator circuit to stabilize before instruction execu-
tion begins.
The POR timer circuit is a one-shot timer triggered by one
of three conditions:
1.
Power Fail to Power OK status.
2.
Stop-Mode Recovery (if D5 of SMR = 1).
3.
WDT Time-Out.
The POR time is a nominal 5 ms. Bit 5 of the Stop-Mode
Register determines whether the POR timer is bypassed
after Stop-Mode Recovery (typical for external clock, RC,
LC oscillators).
Figure 31. Oscillator Configuration
XTAL1
XTAL2
C1
C2
C1
C2
C1
XTAL1
XTAL2
XTAL1
XTAL2
XTAL1
XTAL2
Ceramic Resonator or Crystal
C1, C2 = 47 pF TYP *
f = 8 MHz
LC
C1, C2 = 22 pF
L = 130
µH *
f = 3 MHz *
RC
@ 3V VCC (TYP)
C1 = 33 pF *
R = 1K *
External Clock
L
R
* Preliminary value including pin parasitics



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