參數(shù)資料
型號(hào): MC68HLC705KJ1CDW
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PDSO16
封裝: SOIC-16
文件頁數(shù): 28/117頁
文件大?。?/td> 1644K
代理商: MC68HLC705KJ1CDW
Introduction
Data Sheet
MC68HC705KJ1MC68HRC705KJ1MC68HLC705KJ1 — Rev. 4.0
18
Introduction
MOTOROLA
1.4.2.2 Ceramic Resonator Oscillator
To reduce cost, use a ceramic resonator instead of the crystal. The circuits shown
in Figure 1-6 and Figure 1-7 show ceramic resonator circuits. Follow the resonator
manufacturer’s recommendations, as the resonator parameters determine the
external component values required for maximum stability and reliable starting.
The load capacitance values used in the oscillator circuit design should include all
stray capacitances.
Mount the resonator and components as close as possible to the pins for startup
stabilization and to minimize output distortion. An internal startup resistor of
approximately 2 M
is provided between OSC1 and OSC2 as a programmable
mask option.
Figure 1-6. Ceramic Resonator Connections with
Oscillator Internal Resistor Mask Option
Figure 1-7. Ceramic Resonator Connections without
Oscillator Internal Resistor Mask Option
MCU
C1
C2
CE
RAMIC
C4
C3
CERAMIC
C3
27 pF
C4
27 pF
R
ESONA
T
O
R
RESONATOR
OSC1
OSC2
OSC1
OSC2
VDD
VSS
MCU
C1
C2
R
CERAMIC
C4
C3
R
10 M
CERAMIC
C3
27 pF
C4
27 pF
RESONA
T
O
R
RESONATOR
VSS
VDD
VSS
OSC1
OSC2
OSC1
OSC2
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