OSCTUN: FRC TUNING REGISTER
鍙冩暩(sh霉)璩囨枡
鍨嬭櫉(h脿o)锛� PIC32MX210F016B-I/SS
寤犲晢锛� Microchip Technology
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绋嬪簭瀛樺劜(ch菙)鍣ㄩ鍨嬶細 闁冨瓨
RAM 瀹归噺锛� 4K x 8
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PIC32MX1XX/2XX
DS61168D-page 100
Preliminary
2011-2012 Microchip Technology Inc.
REGISTER 8-2:
OSCTUN: FRC TUNING REGISTER(1)
Bit
Range
Bit
31/23/15/7
Bit
30/22/14/6
Bit
29/21/13/5
Bit
28/20/12/4
Bit
27/19/11/3
Bit
26/18/10/2
Bit
25/17/9/1
Bit
24/16/8/0
31:24
U-0
鈥�
23:16
U-0
R-0
U-0
鈥�
15:8
U-0
R-0
U-0
鈥�
7:0
U-0
R/W-0
鈥�
TUN<5:0>(2)
Legend:
y = Value set from Configuration bits on POR
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as 鈥�0鈥�
-n = Value at POR
鈥�1鈥� = Bit is set
鈥�0鈥� = Bit is cleared
x = Bit is unknown
bit 31-6
Unimplemented: Read as 鈥�0鈥�
bit 5-0
TUN<5:0>: FRC Oscillator Tuning bits(2)
100000 = Center frequency -12.5%
100001 =
111111 =
000000 = Center frequency. Oscillator runs at minimal frequency (8 MHz)
000001 =
011110 =
011111 = Center frequency +12.5%
Note 1: Writes to this register require an unlock sequence. Refer to Section 6. 鈥淥scillator鈥� (DS61112) in the
鈥淧IC32 Family Reference Manual鈥� for details.
2: OSCTUN functionality has been provided to help customers compensate for temperature effects on the
FRC frequency over a wide range of temperatures. The tuning step size is an approximation, and is neither
characterized, nor tested.
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