Microchip Technology AC244045 Fiche De Données
© 2009 Microchip Technology Inc.
DS41341E-page 91
PIC16F72X/PIC16LF72X
7.4
Oscillator Control
The Oscillator Control (OSCCON) register (Figure 7-1)
displays the status and allows frequency selection of the
internal oscillator (INTOSC) system clock. The
OSCCON register contains the following bits:
displays the status and allows frequency selection of the
internal oscillator (INTOSC) system clock. The
OSCCON register contains the following bits:
• Frequency selection bits (IRCF)
• Status Locked bits (ICSL)
• Status Stable bits (ICSS)
REGISTER 7-1:
OSCCON: OSCILLATOR CONTROL REGISTER
U-0
U-0
R/W-1
R/W-0
R-q
R-q
U-0
U-0
—
—
IRCF1
IRCF0
ICSL
ICSS
—
—
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
q = Value depends on condition
bit 7-6
Unimplemented: Read as ‘0’
bit 5-4
IRCF<1:0>: Internal Oscillator Frequency Select bits
When PLLEN = 1 (16 MHz INTOSC)
11
11
= 16 MHz
10
= 8 MHz (POR value)
01
= 4 MHz
00
= 2 MHz
When PLLEN = 0 (500 kHz INTOSC)
11
11
= 500 kHz
10
= 250 kHz (POR value)
01
= 125 kHz
00
= 62.5 kHz
bit 3
ICSL: Internal Clock Oscillator Status Locked bit (2% Stable)
1
= 16 MHz/500 kHz Internal Oscillator (HFIOSC) is in lock.
0
= 16 MHz/500 kHz Internal Oscillator (HFIOSC) has not yet locked.
bit 2
ICSS: Internal Clock Oscillator Status Stable bit (0.5% Stable)
1
= 16 MHz/500 kHz Internal Oscillator (HFIOSC) has stabilized to its maximum accuracy
0
= 16 MHz/500 kHz Internal Oscillator (HFIOSC) has not yet reached its maximum accuracy
bit 1-0
Unimplemented: Read as ‘0’