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PIC24F04KA201 датащи(PDF) 91 Page - Microchip Technology |
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PIC24F04KA201 датащи(HTML) 91 Page - Microchip Technology |
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91 / 224 page ![]() © 2009 Microchip Technology Inc. Preliminary DS39937B-page 89 PIC24F04KA201 FAMILY REGISTER 8-4: REFOCON: REFERENCE OSCILLATOR CONTROL REGISTER R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 ROEN — ROSSLP ROSEL RODIV3 RODIV2 RODIV1 RODIV0 bit 15 bit 8 U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0 — — — — — — — — 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 15 ROEN: Reference Oscillator Output Enable bit 1 = Reference oscillator enabled on REFO pin 0 = Reference oscillator disabled bit 14 Unimplemented: Read as ‘0’ bit 13 ROSSLP: Reference Oscillator Output Stop in Sleep bit 1 = Reference oscillator continues to run in Sleep 0 = Reference oscillator is disabled in Sleep bit 12 ROSEL: Reference Oscillator Source Select bit 1 = Primary oscillator used as the base clock(1) 0 = System clock used as the base clock; base clock reflects any clock switching of the device bit 11-8 RODIV3:RODIV0: Reference Oscillator Divisor Select bits 1111 = Base clock value divided by 32,768 1110 = Base clock value divided by 16,384 1101 = Base clock value divided by 8,192 1100 = Base clock value divided by 4,096 1011 = Base clock value divided by 2,048 1010 = Base clock value divided by 1,024 1001 = Base clock value divided by 512 1000 = Base clock value divided by 256 0111 = Base clock value divided by 128 0110 = Base clock value divided by 64 0101 = Base clock value divided by 32 0100 = Base clock value divided by 16 0011 = Base clock value divided by 8 0010 = Base clock value divided by 4 0001 = Base clock value divided by 2 0000 = Base clock value bit 7-0 Unimplemented: Read as ‘0’ Note 1: The crystal oscillator must be enabled using the FOSC<2:0> bits; the crystal maintains the operation in Sleep mode. |
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