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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ST7FOXU0 데이터시트(PDF) 29 Page - STMicroelectronics |
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ST7FOXU0 데이터시트(HTML) 29 Page - STMicroelectronics |
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29 / 123 page  ST7FOXU0 Supply, reset and clock management 29/123 Figure 10. ST7FOXU0 clock management block diagram 6.2 Multi-oscillator (MO) The main clock of the ST7 can be generated by four different source types coming from the multi-oscillator block (1 to 16 MHz): ● An external source ● An internal high frequency RC oscillator 6.2.1 External clock source In this external clock mode, a clock signal (square, sinus or triangle) with ~50% duty cycle has to drive CLKIN. MCCSR SMS PERIPHERALS (1ms timebase @ 8 MHz fOSC) fOSC/32 fOSC fOSC fLTIMER LITE TIMER COUNTER 13-BIT fCPU TO CPU AND 0 1 CR6 CR9 CR2 CR3 CR4 CR5 CR8 CR7 RCCRH fOSC CLKIN Tunable Oscillator internal RC Option bits CKSEL[1:0] /2 DIVIDER AWU 8 MHz 2 MHz 1 MHz 4 MHz Prescaler RC 8MHz(fRC) 33kHz Clock Controller Ext Clock AWU CK RC OSC CR1 CR0 RCCRL /32 DIVIDER fCLKIN CKCNTCSR RC/AWU 500 kHz MCO MCO PSCR CK2 CK1 CK0 |
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