DSPIC33FJ64GP306 Microchip Technology Inc., DSPIC33FJ64GP306 Datasheet - Page 250

• Manufacturer Part Number: DSPIC33FJ64GP306
• Description: High-performance, 16-bit Digital Signal Controllers
• Manufacturer: Microchip Technology Inc.

dsPIC33FJXXXGPX06/X08/X10
TABLE 21-2:
21.2
All of the dsPIC33FJXXXGPX06/X08/X10 devices
power their core digital logic at a nominal 2.5V. This
DS70286A-page 248
POSCMD<1:0>
FNOSC<2:0>
FCKSM<1:0>
OSCIOFNC
WDTPOST
WDTPRE
FWDTEN
Reserved
Bit Field
WINDIS
IESO
—
On-Chip Voltage Regulator
dsPIC33FJXXXGPX06/X08/X10 CONFIGURATION BITS DESCRIPTION (CONTINUED)
RESERVED3,
FWDT, FPOR
FGS, FOSC-
SEL, FOSC,
FOSCSEL
FOSCSEL
Register
FWDT
FWDT
FWDT
FWDT
FOSC
FOSC
FOSC
FPOR
Two-speed Oscillator Start-up Enable bit
1 = Start-up device with FRC, then automatically switch to the user-selected
0 = Start-up device with user-selected oscillator source
Initial Oscillator Source Selection bits
111 = Internal Fast RC (FRC) oscillator with postscaler
110 = Internal Fast RC (FRC) oscillator with divide-by-16
101 = LPRC oscillator
100 = Secondary (LP) oscillator
011 = Primary (XT, HS, EC) oscillator with PLL
010 = Primary (XT, HS, EC) oscillator
001 = Internal Fast RC (FRC) oscillator with PLL
000 = FRC oscillator
Clock Switching Mode bits
1x = Clock switching is disabled, Fail-Safe Clock Monitor is disabled
01 = Clock switching is enabled, Fail-Safe Clock Monitor is disabled
00 = Clock switching is enabled, Fail-Safe Clock Monitor is enabled
OSC2 Pin Function bit (except in XT and HS modes)
1 = OSC2 is clock output
0 = OSC2 is general purpose digital I/O pin
Primary Oscillator Mode Select bits
11 = Primary oscillator disabled
10 = HS Crystal Oscillator mode
01 = XT Crystal Oscillator mode
00 = EC (External Clock) mode
Watchdog Timer Enable bit
1 = Watchdog Timer always enabled (LPRC oscillator cannot be disabled. Clearing
0 = Watchdog Timer enabled/disabled by user software (LPRC can be disabled
Watchdog Timer Window Enable bit
1 = Watchdog Timer in Non-Window mode
0 = Watchdog Timer in Window mode
Watchdog Timer Prescaler bit
1 = 1:128
0 = 1:32
Watchdog Timer Postscaler bits
1111 = 1:32,768
1110 = 1:16,384
0001 = 1:2
0000 = 1:1
Reserved (either read as ‘1’ and write as ‘1’, or read as ‘0’ and write as ‘0’)
Unimplemented (read as ‘0’, write as ‘0’)
.
.
.
oscillator source when ready.
the SWDTEN bit in the RCON register will have no effect.)
by clearing the SWDTEN bit in the RCON register)
may create an issue for designs that are required to
operate at a higher typical voltage, such as 3.3V. To
simplify
Description
system
design,
© 2007 Microchip Technology Inc.
all
devices
in
the