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PIC18LF4520E/SP 数据表(PDF) 32 Page - Microchip Technology |
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PIC18LF4520E/SP 数据表(HTML) 32 Page - Microchip Technology |
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32 / 390 page  PIC18F2420/2520/4420/4520 DS39631A-page 30 Preliminary 2004 Microchip Technology Inc. REGISTER 2-2: OSCCON REGISTER R/W-0 R/W-1 R/W-0 R/W-0 R(1) R-0 R/W-0 R/W-0 IDLEN IRCF2 IRCF1 IRCF0 OSTS IOFS SCS1 SCS0 bit 7 bit 0 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 IRCF2:IRCF0: Internal Oscillator Frequency Select bits 111 = 8 MHz (INTOSC drives clock directly) 110 = 4 MHz 101 = 2 MHz 100 = 1 MHz(3) 011 = 500 kHz 010 = 250 kHz 001 = 125 kHz 000 = 31 kHz (from either INTOSC/256 or INTRC directly)(2) bit 3 OSTS: Oscillator Start-up Time-out Status bit(1) 1 = Oscillator start-up time-out timer has expired; primary oscillator is running 0 = Oscillator start-up time-out timer is running; primary oscillator is not ready bit 2 IOFS: INTOSC Frequency Stable bit 1 = INTOSC frequency is stable 0 = INTOSC frequency is not stable bit 1-0 SCS1:SCS0: System Clock Select bits 1x = Internal oscillator block 01 = Secondary (Timer1) oscillator 00 = Primary oscillator Note 1: Reset state depends on state of the IESO configuration bit. 2: Source selected by the INTSRC bit (OSCTUNE<7>), see text. 3: Default output frequency of INTOSC on Reset. Legend: R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ -n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown |
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