參數(shù)資料
型號: Z86C71
廠商: ZiLOG, Inc.
英文描述: IR/Low-Voltage Microcontroller
中文描述: 紅外/低電壓微控制器
文件頁數(shù): 41/61頁
文件大小: 349K
代理商: Z86C71
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 V
CC
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
μ
H *
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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