Datasheet

© 2006 Microchip Technology Inc. Preliminary DS70178C-page 201
dsPIC30F1010/202X
REGISTER 18-2: OSCTUN: OSCILLATOR TUNING REGISTER
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
TSEQ3<3:0> TSEQ2<3:0>
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
TSEQ1<3:0> TUN<3:0>
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 15-12 TSEQ3<3:0>: Tune Sequence Value #3 bits
When PWM ROLL<2:0> = 011, this field is used to tune the FRC instead of TUN<3:0>
bit 11-8 TSEQ2<3:0>: Tune Sequence Value #2 bits
When PWM ROLL<2:0> = 010, this field is used to tune the FRC instead of TUN<3:0>
bit 7-4 TSEQ1<3:0>: Tune Sequence Value #1 bits
When PWM ROLL<2:0> = 001, this field is used to tune the FRC instead of TUN<3:0>
bit 3-0 TUN<3:0>: Specifies the user tuning capability for the internal fast RC oscillator . If the TSEQEN bit
in the OSCCON register is set, this field, along with bits TSEQ1-TSEQ7, will sequentially tune the
FRC oscillator.
0111 = Maximum frequency
0110 =
0101 =
0100 =
0011 =
0010 =
0001 =
0000 = Center frequency, oscillator is running at calibrated frequency
1111 =
1110 =
1101 =
1100 =
1011 =
1010 =
1001 =
1000 = Minimum frequency