參數(shù)資料
型號： SAL-XC886C-6FFA5V
廠商： INFINEON TECHNOLOGIES AG
元件分類： 微控制器/微處理器
英文描述： 8-BIT, FLASH, 80 MHz, MICROCONTROLLER, PQFP48
封裝： GREEN, PLASTIC, TQFP-48
文件頁數(shù)： 112/134頁
文件大?。?/td> 864K
代理商： SAL-XC886C-6FFA5V
SAL-XC886CLM
Functional Description
Data Sheet
72
V1.0, 2010-05
Table 24 shows the VCO range for the SAL-XC886.
3.8.1
Recommended External Oscillator Circuits
The oscillator circuit, a Pierce oscillator, is designed to work with both, an external crystal
oscillator or an external stable clock source. It basically consists of an inverting amplifier
and a feedback element with XTAL1 as input, and XTAL2 as output.
When using a crystal, a proper external oscillator circuitry must be connected to both
pins, XTAL1 and XTAL2. The crystal frequency can be within the range of 4 MHz
to 12 MHz. Additionally, it is necessary to have two load capacitances
C
X1 and CX2, and
depending on the crystal type, a series resistor
R
X2, to limit the current. A test resistor RQ
may be temporarily inserted to measure the oscillation allowance (negative resistance)
of the oscillator circuitry.
R
Q values are typically specified by the crystal vendor. The CX1
and
C
X2 values shown in Figure 24 can be used as starting points for the negative
resistance evaluation and for non-productive systems. The exact values and related
operating range are dependent on the crystal frequency and have to be determined and
optimized together with the crystal vendor using the negative resistance method.
Oscillation measurement with the final target system is strongly recommended to verify
the input amplitude at XTAL1 and to determine the actual oscillation allowance (margin
negative resistance) for the oscillator-crystal system.
When using an external clock signal, the signal must be connected to XTAL1. XTAL2 is
left open (unconnected).
The oscillator can also be used in combination with a ceramic resonator. The final
circuitry must also be verified by the resonator vendor. Figure 24 shows the
recommended external oscillator circuitries for both operating modes, external crystal
mode and external input clock mode.
Table 24
VCO Range
f
VCOmin
f
VCOmax
f
VCOFREEmin
f
VCOFREEmax
Unit
150
200
20
80
MHz
100
150
10
80
MHz
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SAL-XC886CLM 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit Single Chip Microcontroller
SAL-XC886CLM-8FFA 5V AC 功能描述:8位微控制器 -MCU 8-Bit Single Chip Microcontroller RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
SAL-XC886CM-8FFA 5V AC 功能描述:8位微控制器 -MCU 8-Bit Single Chip Microcontroller RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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