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PIC16F913-I/ML 数据表(PDF) 98 Page - Microchip Technology |
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PIC16F913-I/ML 数据表(HTML) 98 Page - Microchip Technology |
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98 / 330 page ![]() PIC16F913/914/916/917/946 DS41250F-page 96 © 2007 Microchip Technology Inc. 4.7.3 CHECKING TWO-SPEED CLOCK STATUS Checking the state of the OSTS bit of the OSCCON register will confirm if the microcontroller is running from the external clock source, as defined by the FOSC<2:0> bits in the Configuration Word register (CONFIG), or the internal oscillator. FIGURE 4-7: TWO-SPEED START-UP 0 1 1022 1023 PC + 1 TOST T HFINTOSC OSC1 OSC2 Program Counter System Clock PC - N PC |
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