Microchip Technology AC164337 Data Sheet
2006-2014 Microchip Technology Inc.
DS70000178D-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.
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