Microchip Technology MA330011 データシート
©
2007 Microchip Technology Inc.
Preliminary
DS70165E-page 155
dsPIC33F
REGISTER 8-4:
OSCTUN: FRC OSCILLATOR TUNING REGISTER
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
—
—
TUN5
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 15-6
Unimplemented: Read as ‘
0
’
bit 5-0
TUN<5:0>: FRC Oscillator Tuning bits
011111
= Center frequency + 11.625%
011110
= Center frequency + 11.25% (8.23 MHz)
•
•
•
•
•
000001
= Center frequency + 0.375% (7.40 MHz)
000000
= Center frequency (7.37 MHz nominal)
111111
= Center frequency – 0.375% (7.345 MHz)
•
•
•
•
•
100001
= Center frequency – 11.625% (6.52 MHz)
100000
= Center frequency – 12% (6.49 MHz)