PIC24FJ128GC010 Datasheet, PDF (164/472 Pages) Microchip Technology – 16-Bit Flash Microcontrollers with 12-Bit Pipeline A/D, Sigma-Delta A/D, USB On-The-Go and XLP Technology

PIC24FJ128GC010 FAMILY
REGISTER 9-3: OSCTUN: FRC OSCILLATOR TUNE REGISTER
R/W-0
STEN
bit 15
U-0
R/W-0
R/W-0
R-0
R/W-0
—
STSIDL
STSRC⁽¹⁾
STLOCK
STLPOL
R-0
STOR
R/W-0
STORPOL
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
—
TUN5⁽²⁾
TUN4⁽²⁾
TUN3⁽²⁾
TUN2⁽²⁾
TUN1⁽²⁾
TUN0⁽²⁾
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
bit 14
bit 13
bit 12
bit 11
bit 10
bit 9
bit 8
bit 7-6
bit 5-0
STEN: FRC Self-Tune Enable bit
1 = FRC self-tuning is enabled; TUNx bits are controlled by hardware
0 = FRC self-tuning is disabled; application may optionally control TUNx bits
Unimplemented: Read as ‘0’
STSIDL: FRC Self-Tune Stop in Idle bit
1 = Self-tuning stops during Idle mode
0 = Self-tuning continues during Idle mode
STSRC: FRC Self-Tune Reference Clock Source bit⁽¹⁾
1 = FRC is tuned to approximately match the USB host clock tolerance
0 = FRC is tuned to approximately match the 32.768 kHz SOSC tolerance
STLOCK: FRC Self-Tune Lock Status bit
1 = FRC accuracy is currently within ±0.2% of the STSRC reference accuracy
0 = FRC accuracy may not be within ±0.2% of the STSRC reference accuracy
STLPOL: FRC Self-Tune Lock Interrupt Polarity bit
1 = A self-tune lock interrupt is generated when STLOCK is ‘0’
0 = A self-tune lock interrupt is generated when STLOCK is ‘1’
STOR: FRC Self-Tune Out of Range Status bit
1 = STSRC reference clock error is beyond the range of TUN<5:0>; no tuning is performed
0 = STSRC reference clock is within the tunable range; tuning is performed
STORPOL: FRC Self-Tune Out of Range Interrupt Polarity bit
1 = A self-tune out of range interrupt is generated when STOR is ‘0’
0 = A self-tune out of range interrupt is generated when STOR is ‘1’
Unimplemented: Read as ‘0’
TUN<5:0>: FRC Oscillator Tuning bits⁽²⁾
011111 = Maximum frequency deviation
011110 =

000001 =
000000 = Center frequency, oscillator is running at factory calibrated frequency
111111 =

100001 =
100000 = Minimum frequency deviation
Note 1: Use of either clock tuning reference source has specific application requirements. See Section 9.5 “FRC
Active Clock Tuning” for details.
2: These bits are read-only when STEN = 1.
DS30009312B-page 164
 2012-2013 Microchip Technology Inc.