70592C Datasheet, PDF (134/314 Pages) Microchip Technology – High-Performance, 16-bit Microcontrollers

PIC24HJXXXGPX06A/X08A/X10A
REGISTER 9-4: OSCTUN: FRC OSCILLATOR TUNING REGISTER⁽²⁾
U-0
—
bit 15
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
U-0
U-0
—
—
bit 8
U-0
—
bit 7
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
TUN<5:0>⁽¹⁾
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-6
bit 5-0
Unimplemented: Read as ‘0’
TUN<5:0>: FRC Oscillator Tuning bits⁽¹⁾
111111 = Center frequency – 0.375% (7.345 MHz)
•
•
•
100001 = Center frequency – 11.625% (6.52 MHz)
100000 = Center frequency – 12% (6.49 MHz)
011111 = Center frequency + 11.625% (8.23 MHz)
011110 = Center frequency + 11.25% (8.20 MHz)
•
•
•
000001 = Center frequency + 0.375% (7.40 MHz)
000000 = Center frequency (7.37 MHz nominal)
Note 1:
2:
OSCTUN functionality has been provided to help customers compensate for temperature effects on the
FRC frequency over a wide range of temperatures. The tuning step size is an approximation and is neither
characterized nor tested.
This register is reset only on a Power-on Reset (POR).
DS70592C-page 134
© 2011 Microchip Technology Inc.