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PIC18F23K20-E/ML датащи(PDF) 29 Page - Microchip Technology |
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PIC18F23K20-E/ML датащи(HTML) 29 Page - Microchip Technology |
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29 / 456 page ![]() 2010 Microchip Technology Inc. DS41303G-page 29 PIC18F2XK20/4XK20 REGISTER 2-1: OSCCON: OSCILLATOR CONTROL REGISTER R/W-0 R/W-0 R/W-1 R/W-1 R-q R-0 R/W-0 R/W-0 IDLEN IRCF2 IRCF1 IRCF0 OSTS(1) IOFS SCS1 SCS0 bit 7 bit 0 Legend: R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ q = depends on condition -n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown bit 7 IDLEN: Idle Enable bit 1 = Device enters Idle mode on SLEEP instruction 0 = Device enters Sleep mode on SLEEP instruction bit 6-4 IRCF<2:0>: Internal Oscillator Frequency Select bits 111 = 16 MHz (HFINTOSC drives clock directly) 110 = 8 MHz 101 = 4 MHz 100 = 2 MHz 011 = 1 MHz(3) 010 = 500 kHz 001 = 250 kHz 000 = 31 kHz (from either HFINTOSC/512 or LFINTOSC directly)(2) bit 3 OSTS: Oscillator Start-up Time-out Status bit(1) 1 = Device is running from the clock defined by FOSC<2:0> of the CONFIG1 register 0 = Device is running from the internal oscillator (HFINTOSC or LFINTOSC) bit 2 IOFS: HFINTOSC Frequency Stable bit 1 = HFINTOSC frequency is stable 0 = HFINTOSC frequency is not stable bit 1-0 SCS<1:0>: System Clock Select bits 1x = Internal oscillator block 01 = Secondary (Timer1) oscillator 00 = Primary clock (determined by CONFIG1H[FOSC<3:0>]). Note 1: Reset state depends on state of the IESO Configuration bit. 2: Source selected by the INTSRC bit of the OSCTUNE register, see text. 3: Default output frequency of HFINTOSC on Reset. |
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