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參數(shù)資料
| 型號： | HC805P18GRS |
| 英文描述： | 68HC805P18 Technical Data |
| 中文描述： | 68HC805P18技術(shù)數(shù)據(jù) |
| 文件頁數(shù)： | 14/111頁 |
| 文件大?。?/td> | 748K |
| 代理商： | HC805P18GRS |
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GENERAL RELEASE SPECIFICATION
MC68HC805P18
Rev. 1.0
INTRODUCTION
MOTOROLA
1-5
8
2
3
4
5
6
7
8
9
10
11
12
13
14
A
16
17
18
19
20
1.4.2 OSC1 and OSC2
The OSC1 and OSC2 pins are the control connections for the on-chip oscillator.
The OSC1 and OSC2 pins can accept the following:
1.
A crystal as shown in Figure 1-3(a)
2.
A ceramic resonator as shown in Figure 1-3(a)
3.
An external clock signal as shown in Figure 1-3(b)
The frequency, f
osc
, of the oscillator or external clock source is divided by two to
produce the internal PH2 bus clock operating frequency, f
op
. The oscillator cannot
be turned off by software if the stop-to-halt conversion is enabled via mask option
register 1. Refer to
8.4 Mask Option Registers (MOR)
.
1.4.3 Crystal
The circuit in Figure 1-3(a) shows a typical oscillator circuit for an AT-cut, parallel
resonant crystal. Follow the crystal manufacturer’s recommendations, as the
crystal parameters determine the external component values required to provide
maximum stability and reliable startup. The load capacitance values used in the
oscillator circuit design should include all stray capacitances. Mount the crystal and
components as close as possible to the pins for startup stabilization and to
minimize output distortion.
Ceramic Resonator
In cost-sensitive applications, use a ceramic resonator instead of a crystal. Use
the circuit in Figure 1-3(a) for a ceramic resonator and 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.
External Clock
An external clock from another CMOS-compatible device can be connected to
the OSC1 input, with the OSC2 input not connected, as shown in Figure 1-3(b)
.
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HC80-8.0MHZ | 功能描述:晶體 CRYSTAL 8MHz RoHS:否 制造商:AVX 頻率:26 MHz 容差: 頻率穩(wěn)定性:50 PPM 負(fù)載電容:8 pF 端接類型:SMD/SMT 封裝 / 箱體:1210 (3225 metric) 工作溫度范圍:- 40 C to + 150 C 尺寸:2.5 mm W x 3.2 mm L x 0.85 mm H 封裝:Reel |
| HC80U | 制造商:FOX 制造商全稱:FOX 功能描述:RESISTANCE WELD THRU-HOLE CRYSTAL |
| HC80U-3.6864MHz | 功能描述:晶體 3.6864MHz 20pF RoHS:否 制造商:AVX 頻率:26 MHz 容差: 頻率穩(wěn)定性:50 PPM 負(fù)載電容:8 pF 端接類型:SMD/SMT 封裝 / 箱體:1210 (3225 metric) 工作溫度范圍:- 40 C to + 150 C 尺寸:2.5 mm W x 3.2 mm L x 0.85 mm H 封裝:Reel |
| HC80UW | 制造商:FOX 制造商全稱:FOX 功能描述:RESISTANCE WELD MINIATURE CRYSTAL (GULLWING) |
| HC8-100-R | 功能描述:固定電感器 10uH 9.2A 43.6mOhms RoHS:否 制造商:AVX 電感:10 uH 容差:20 % 最大直流電流:1 A 最大直流電阻:0.075 Ohms 工作溫度范圍:- 40 C to + 85 C 自諧振頻率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接類型:SMD/SMT 封裝 / 箱體:6.6 mm x 4.45 mm |
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