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参数资料
| 型号： | C166 |
| 厂商： | SIEMENS AG |
| 元件分类： | 8位微控制器 |
| 英文描述： | 8-Bit Microcontroller(8位微控制器) |
| 中文描述： | 8位微控制器（8位微控制器） |
| 文件页数： | 5/45页 |
| 文件大小： | 654K |
| 代理商： | C166 |
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AP242005 07.99
Crystal Oscillators of the
C500 / C166 Microcontroller Family
1
Introduction
This Application Note provides recommendations concerning the selection of quartz crystals and
circuit composition for each oscillator. The cooperation between the IC oscillator and the quartz
crystal is not always working properly because of a wrong composition of external circuits.
Therefore
Infineon Technologies
(MD AE) and
Tele Quarz Group
built up a cooperation to
support our customers with the appropriate knowledge to guarantee a problem-free operation of the
oscillator. The content concerning the measurements to find the right external circuits is a general
information and can be used for all pierce oscillators using an oscillator-inverter.
2
Oscillator-Inverter
The microcontrollers of the C500/C166 Family include the active part of the oscillator (also called
oscillator-inverter). Based on the history and evolution of the microcontrollers there are different
oscillator-inverters implemented at the C500/C166 Family members. Due to the same reason, the
meaning of XTAL1 and XTAL2 pins is different. In this Application Note and at the C166 Family,
XTAL1 is the oscillator-inverter input while XTAL2 is the output. At the C500 Family it is
recommended to have a closer look at the Data Sheet of each device.
Some devices include an auxiliary oscillator. This is a real time clock oscillator-inverter, XTAL3 is
the oscillator-inverter input while XTAL4 is the output.
The on-chip oscillator-inverter can either run with an external crystal and appropriate external
oscillator circuitry (also called oscillator circuitry or passive part of the oscillator), or it can be driven
by an external oscillator. The external oscillator directly connected to XTAL1, leaving XTAL2 open,
feeds the external clock signal to the internal clock circuitry.
The oscillator input XTAL1 and output XTAL2 connect the internal CMOS Pierce oscillator to the
external crystal. The oscillator provides an inverter and a feedback element. The resistance of the
feedback element is in the range of 0.5 to 1 M
.
Depending on the type of oscillator-inverter the gain can be different between reset active and reset
inactive. The recommendations in the appendix are separated to the different oscillator-inverter
types of the C500 and C166 Family.
2.1
Oscillator Inverter Type_A, Type_B and Type_C
These types of inverters are implemented in C500 Family derivatives. The gain of these types of
oscillator-inverters is the same during reset active and reset inactive. These oscillators are
optimized for operating frequencies in the range of 2.0 (3.5) to 20 MHz. For details refer to appendix.
相关PDF资料 |
PDF描述 |
|---|---|
| C1676 | Approved for use with GlobeSpan HDSL2 Chip Set Meets the requirements of IEC60950 for supplementary insulation, 250V working voltage |
| C167CR-16F | 16-Bit CMOS Single-Chip Microcontroller with 128KByte Flash EPROM |
| C167CR-16RM | 16-Bit CMOS Single-Chip Microcontrollers |
| C167CR | 16-bit microcontrollers(16位微控制器) |
| C167CS-4R | BOARD INTERFACE KGZ/GMS 0-100% |
相关代理商/技术参数 |
参数描述 |
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| C1660 | 制造商:TE Connectivity 功能描述:TRANSFORMER - Tape and Reel |
| C1663-012 | 制造商:TINNERMAN 功能描述: |
| C1663-012-1 | 制造商:TINNERMAN 功能描述: |
| C1663-012-3B | 制造商:TINNERMAN 功能描述: |
| C1663-012-4 | 制造商:TINNERMAN 功能描述: |
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