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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PIC12F635ESS датащи(PDF) 42 Page - Microchip Technology |
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PIC12F635ESS датащи(HTML) 42 Page - Microchip Technology |
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42 / 234 page  PIC12F635/PIC16F636/639 DS41232D-page 40 © 2007 Microchip Technology Inc. 3.5.2.1 OSCTUNE Register The HFINTOSC is factory calibrated but can be adjusted in software by writing to the OSCTUNE register (Register 3-2). The default value of the OSCTUNE register is ‘0’. The value is a 5-bit two’s complement number. When the OSCTUNE register is modified, the HFINTOSC frequency will begin shifting to the new frequency. Code execution continues during this shift. There is no indication that the shift has occurred. OSCTUNE does not affect the LFINTOSC frequency. Operation of features that depend on the LFINTOSC clock source frequency, such as the Power-up Timer (PWRT), Watchdog Timer (WDT), Fail-Safe Clock Monitor (FSCM) and peripherals, are not affected by the change in frequency. REGISTER 3-2: OSCTUNE: OSCILLATOR TUNING REGISTER U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 — — — TUN4 TUN3 TUN2 TUN1 TUN0 bit 7 bit 0 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 bit 7-5 Unimplemented: Read as ‘0’ bit 4-0 TUN<4:0>: Frequency Tuning bits 01111 = Maximum frequency 01110 = • • • 00001 = 00000 = Oscillator module is running at the calibrated frequency. 11111 = • • • 10000 = Minimum frequency |
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