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ST10F276S-4T3 参数 Datasheet PDF下载

ST10F276S-4T3图片预览
型号: ST10F276S-4T3
PDF下载: 下载PDF文件 查看货源
内容描述: 16位MCU与MAC单元832 KB的闪存和68 KB的RAM [16-bit MCU with MAC unit 832 Kbyte Flash memory and 68 Kbyte RAM]
分类和应用: 闪存
文件页数/大小: 235 页 / 2491 K
品牌: STMICROELECTRONICS [ ST ]
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Electrical characteristics  
ST10F276E  
2. Not 100% tested, guaranteed by design characterization.  
Figure 55. 32 kHz crystal oscillator connection diagram  
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Table 101. Minimum values of negative resistance (module)  
Oscillator  
CA = 6pF CA = 12pF CA = 15pF CA = 18pF CA = 22pF CA = 27pF CA = 33pF  
frequency  
32 kHz  
-
-
-
-
150 kΩ  
120 kΩ  
90 kΩ  
The given values of CA do not include the stray capacitance of the package and of the  
printed circuit board: The negative resistance values are calculated assuming additional 5pF  
to the values in the table. The crystal shunt capacitance (C0), the package and the stray  
capacitance between XTAL3 and XTAL4 pins is globally assumed equal to 4pF. The external  
resistance between XTAL3 and XTAL4 is not necessary, since already present on the  
silicon.  
Warning: Direct driving on XTAL3 pin is not supported. Always use a  
32 kHz crystal oscillator.  
23.8.15 External clock drive XTAL1  
When Direct Drive configuration is selected during reset, it is possible to drive the CPU clock  
directly from the XTAL1 pin, without particular restrictions on the maximum frequency, since  
the on-chip oscillator amplifier is bypassed. The speed limit is imposed by internal logic that  
targets a maximum CPU frequency of 64 MHz.  
In all other clock configurations (Direct Drive with Prescaler or PLL usage) the on-chip  
oscillator amplifier is not bypassed, so it determines the input clock speed limit. Then an  
external clock source can be used but limited in the range of frequencies defined for the  
usage of crystal and resonator (refer also to Table 95 on page 199).  
External clock drive timing conditions: VDD = 5V 10%, VSS = 0V, TA = -40 to +125°C  
206/235  
Doc ID 12303 Rev 3  
 
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