
dsPIC30F1010/202X
DS70178C-page 202
Preliminary
 2006 Microchip Technology Inc.
REGISTER 18-3:
OSCTUN2: OSCILLATOR TUNING REGISTER 2
R/W-0
TSEQ7<3:0>
TSEQ6<3:0>
bit 15
bit 8
R/W-0
TSEQ5<3:0>
TSEQ4<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
TSEQ7<3:0>: Tune Sequence value #7 bits
When PWM ROLL<2:0> = 111, this field is used to tune the FRC instead of TUN<3:0>
bit 11-8
TSEQ6<3:0>: Tune Sequence value #6 bits
When PWM ROLL<2:0> = 110, this field is used to tune the FRC instead of TUN<3:0>
bit 7-4
TSEQ5<3:0>: Tune Sequence value #5 bits
When PWM ROLL<2:0> = 101, this field is used to tune the FRC instead of TUN<3:0>
bit 3-0
TSEQ4<3:0>: Tune Sequence value #4 bits
When PWM ROLL<2:0> = 100, this field is used to tune the FRC instead of TUN<3:0>
REGISTER 18-4:
LFSR: LINEAR FEEDBACK SHIFT REGISTER
U-0
R/W-0
—LFSR<14:8>
bit 15
bit 8
R/W-0
LFSR<7:0>
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
Unimplemented: Read as ‘0’
When PWM ROLL<2:0> = 111, this field is used to tune the FRC instead of TUN<3:0>
bit 14-8
LFSR <14:8>: Most Significant 7 bits of the pseudo random FRC trim value bits
bit 7-0
LFSR <7:0>:
Least Significant 8 bits of the pseudo random FRC trim value bits