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SN8P1602 Datasheet(PDF) 42 Page - SONiX Technology Company |
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SN8P1602 Datasheet(HTML) 42 Page - SONiX Technology Company |
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42 / 76 page  SN8P1602B 8-Bit Micro-Controller SONiX TECHNOLOGY CO., LTD Page 42 Version 1.1 External RC Oscillator Frequency Measurement There are two ways to get the Fosc frequency of external RC oscillator. One way is to measure the XOUT output waveform. Moreover, the other way is to measure the external RC frequency by software instruction cycle (Fcpu). Example: Fcpu instruction cycle of external oscillator B0BSET P1M.0 ; Set P1.0 to be output mode for outputting Fcpu toggle signal. @@: B0BSET P1.0 ; Output Fcpu toggle signal in low-speed clock mode. B0BCLR P1.0 ; Measure the Fcpu frequency by oscilloscope. JMP @B Note: Do not measure the RC frequency directly from XIN, the probe impendence will affect the RC value. |
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