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参数资料
型号： SAK-XC866-1FRA
厂商： INFINEON TECHNOLOGIES AG
元件分类： 微控制器/微处理器
英文描述： 8-BIT, FLASH, 26.7 MHz, MICROCONTROLLER, PDSO38
封装： PLASTIC, GREEN, TSSOP-38
文件页数： 77/116页
文件大小： 1640K
代理商： SAK-XC866-1FRA
XC866
Functional Description
Data Sheet
59
V1.2, 2007-10
Table 22 shows the VCO range for the XC866.
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
CX1 and CX2, and
depending on the crystal type, a series resistor
RX2, to limit the current. A test resistor
RQ may be temporarily inserted to measure the oscillation allowance (negative
resistance) of the oscillator circuitry.
RQ values are typically specified by the crystal
vendor. The
CX1 and CX2 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 21
System frequency (fsys =80MHz)
Oscillator
fosc
N
P
K
fsys
On-chip
10 MHz
16
1
2
80 MHz
External
10 MHz
16
1
2
80 MHz
8 MHz
20
1
2
80 MHz
5 MHz
32
1
2
80 MHz
Table 22
VCO Range
fVCOmin
fVCOmax
fVCOFREEmin
fVCOFREEmax
Unit
150
200
20
80
MHz
100
150
10
80
MHz
相关PDF资料
PDF描述
SAK-XC866-4FRA 8-BIT, FLASH, 26.7 MHz, MICROCONTROLLER, PDSO38
SAK-XC866-4RRA 8-BIT, FLASH, 26.7 MHz, MICROCONTROLLER, PDSO38
SAK-XC866-4RRI3V 8-BIT, FLASH, 26.7 MHz, MICROCONTROLLER, PDSO38
SAF-XC866-2FRA3V 8-BIT, FLASH, 26.7 MHz, MICROCONTROLLER, PDSO38
SAF-XC866-2FRA 8-BIT, FLASH, 26.7 MHz, MICROCONTROLLER, PDSO38
相关代理商/技术参数
参数描述
SAKXC8661FRA AA 制造商:Infineon Technologies AG 功能描述:
SAK-XC866-1FRA AB 功能描述:8位微控制器 -MCU 8-Bit Single-Chip 3.3V 26.67MHz Flash RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
SAKXC8661FRAAB 功能描述:8位微控制器 -MCU RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
SAK-XC866-1FRI AB 功能描述:8位微控制器 -MCU 8 BIT FLASH SINGLE CHIP CNTRLR RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
SAK-XC866-2FRA BC 功能描述:8位微控制器 -MCU 8-Bit Single-Chip 3.3V 26.67MHz Flash RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
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