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10F200 датащи(PDF) 23 Page - Microchip Technology |
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10F200 датащи(HTML) 23 Page - Microchip Technology |
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23 / 96 page ![]() © 2007 Microchip Technology Inc. DS41239D-page 21 PIC10F200/202/204/206 4.6 OSCCAL Register The Oscillator Calibration (OSCCAL) register is used to calibrate the internal precision 4 MHz oscillator. It contains seven bits for calibration . After you move in the calibration constant, do not change the value. See Section 9.2.2 “Internal 4 MHz Oscillator”. Note: Erasing the device will also erase the pre- programmed internal calibration value for the internal oscillator. The calibration value must be read prior to erasing the part so it can be reprogrammed correctly later. REGISTER 4-3: OSCCAL REGISTER R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-0 CAL6 CAL5 CAL4 CAL3 CAL2 CAL1 CAL0 FOSC4 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 7-1 CAL<6:0>: Oscillator Calibration bits 0111111 = Maximum frequency • • • 0000001 0000000 = Center frequency 1111111 • • • 1000000 =Minimum frequency bit 0 FOSC4: INTOSC/4 Output Enable bit(1) 1 = INTOSC/4 output onto GP2 0 = GP2/T0CKI/COUT applied to GP2 Note 1: Overrides GP2/T0CKI/COUT control registers when enabled. |
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