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SN8P1603S 参数 Datasheet PDF下载

SN8P1603S图片预览
型号: SN8P1603S
PDF下载: 下载PDF文件 查看货源
内容描述: 8位微控制器 [8-Bit Micro-Controller]
分类和应用: 微控制器
文件页数/大小: 94 页 / 531 K
品牌: SONIX [ SONIX TECHNOLOGY COMPANY ]
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SN8P1600  
8-bit micro-controller  
INTERNAL LOW-SPEED OSCILLATOR  
The internal low-speed oscillator is built in the micro-controller. The low-speed clock source is a RC type oscillator  
circuit. The low-speed clock can supplies clock for system clock and timer,.  
Example: Stop internal low-speed oscillator.  
B0BSET FCPUM0  
; To stop external high-speed oscillator and internal low-speed  
; oscillator called power down mode (sleep mode).  
Note: The internal low-speed clock can’t be turned off individually. It is controlled by CPUM0 bit of OSCM  
register.  
The low-speed oscillator uses RC type oscillator circuit. The frequency is affected by the voltage and temperature of  
the system. In common condition, the frequency of the RC oscillator is about 16KHz at 3V and 32KHz at 5V. The  
relative between the RC frequency and voltage is as the following figure.  
Internal RC vs. VDD  
40  
38.678  
35.343  
35  
32.008  
30  
28.673  
25.338  
25  
22.003  
20  
18.668  
15.333  
15  
11.998  
10  
8.663  
7.329  
5
0
1.80 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 6.50  
VDD (Volts)  
Example: Measure the internal RC frequency by instruction cycle (Fcpu). The internal RC frequency is the  
Fcpu multiplied by 4. We can get the Fosc frequency of internal RC from the Fcpu frequency.  
B0BSET  
B0BSET  
P1M.0  
; Set P1.0 to be output mode for outputting Fcpu toggle signal.  
; Switch the system clock to internal low-speed clock mode.  
FCLKMD  
@@:  
B0BSET  
B0BCLR  
JMP  
P1.0  
P1.0  
@B  
; Output Fcpu toggle signal in low-speed clock mode.  
; Measure the Fcpu frequency by oscilloscope.  
SONiX TECHNOLOGY CO., LTD  
Page 46  
Revision 1.94  
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