參數(shù)資料
型號: Z86E72
廠商: ZiLOG, Inc.
英文描述: OTP IR Microcontroller(一次可編程紅外線微控制器)
中文描述: 檢察官辦公室紅外微控制器(一次可編程紅外線微控制器)
文件頁數(shù): 48/75頁
文件大小: 394K
代理商: Z86E72
Z86E72/73
OTP IR Microcontroller
Zilog
48
P R E L I M I N A R Y
DS97LVO1100
FUNCTIONAL DESCRIPTION
(Continued)
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 38. 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
C1
32 kHz XTAL
C1 = 20 pF, C = 33
pF
Rd = 56 - 470K
Rf =10 M
Rf
C2
Rd
XTAL1
XTAL2
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