Datasheet

 2013-2014 Microchip Technology Inc. DS70000689D-page 151
dsPIC33EPXXXGM3XX/6XX/7XX
REGISTER 9-4: OSCTUN: FRC OSCILLATOR TUNING REGISTER
(1)
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — TUN<5:0>
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 15-6 Unimplemented: Read as ‘0’
bit 5-0 TUN<5:0>: FRC Oscillator Tuning bits
111111 = Center frequency – 0.047%
•
•
•
100001 = Center frequency – 1.453%
100000 = Center frequency – 1.5% (7.355 MHz)
011111 = Center frequency + 1.5% (7.385 MHz)
011110 = Center frequency + 1.453%
•
•
•
000001 = Center frequency + 0.047%
000000 = Center frequency (7.3728 MHz nominal)
Note 1: This register resets only on a Power-on Reset (POR).