PIC16F1946 Datasheet, PDF (74/440 Pages) Microchip Technology – 64-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt XLP Technology

PIC16F/LF1946/47
5.6 Oscillator Control Registers
REGISTER 5-1: OSCCON: OSCILLATOR CONTROL REGISTER
R/W-0/0
R/W-0/0
R/W-1/1
R/W-1/1
R/W-1/1
U-0
SPLLEN
IRCF<3:0>
—
bit 7
R/W-0/0
R/W-0/0
SCS<1:0>
bit 0
Legend:
R = Readable bit
u = Bit is unchanged
‘1’ = Bit is set
W = Writable bit
x = Bit is unknown
‘0’ = Bit is cleared
U = Unimplemented bit, read as ‘0’
-n/n = Value at POR and BOR/Value at all other Resets
bit 7
bit 6-3
bit 2
bit 1-0
SPLLEN: Software PLL Enable bit
If PLLEN in Configuration Word 1 = 1:
SPLLEN bit is ignored. 4x PLL is always enabled (subject to oscillator requirements)
If PLLEN in Configuration Word 1 = 0:
1 = 4x PLL Is enabled
0 = 4x PLL is disabled
IRCF<3:0>: Internal Oscillator Frequency Select bits
000x =
0010 =
0011 =
0100 =
0101 =
0110 =
0111 =
1000 =
1001 =
1010 =
1011 =
1100 =
1101 =
1110 =
1111 =
31 kHz LF
31.25 kHz MF
31.25 kHz HF⁽¹⁾
62.5 kHz MF
125 kHz MF
250 kHz MF
500 kHz MF (default upon Reset)
125 kHz HF⁽¹⁾
250 kHz HF⁽¹⁾
500 kHz HF⁽¹⁾
1 MHz HF
2 MHz HF
4 MHz HF
8 MHz or 32 MHz HF(see Section 5.2.1.4 “4X PLL”)
16 MHz HF
Unimplemented: Read as ‘0’
SCS<1:0>: System Clock Select bits
1x = Internal oscillator block
01 = Timer1 oscillator
00 = Clock determined by FOSC<2:0> in Configuration Word 1.
Note 1: Duplicate frequency derived from HFINTOSC.
DS41414A-page 72
Preliminary
 2010 Microchip Technology Inc.