PIC32MX440F256H-80I Datasheet, PDF (67/646 Pages) Microchip Technology – 64/100-Pin General Purpose and USB 32-Bit Flash Microcontrollers

PIC32MX3XX/4XX
REGISTER 4-7: DEVCFG1 BOOT CONFIGURATION REGISTER
r-1
r-1
r-1
r-1
r-1
r-1
r-1
r-1
—
—
—
—
—
—
—
—
bit 31
bit 24
R/P-1
FWDTEN
bit 23
R/P-1
—
r-1
R/P-1
R/P-1
R/P-1
R/P-1
R/P-1
—
FWDTPS4 FWDTPS3 FWDTPS2 FWDTPS1 FWDTPS0
bit 16
R/P-1
R/P-1
FCKSM<1:0>
bit 15
R/P-1
R/P-1
FPBDIV<1:0>
r-1
R/P-1
R/P-1
R/P-1
—
OSCIOFNC
POSCMD<1:0>
bit 8
R/P-1
IESO
bit 7
r-1
R/P-1
r-1
—
FSOSCEN
—
r-1
R/P-1
R/P-1
R/P-1
—
FNOSC2 FNOSC1 FNOSC0
bit 0
Legend:
R = Readable bit
U = Unimplemented bit
W = Writable bit
P = Programmable bit
-n = Bit Value at POR: (‘0’, ‘1’, x = Unknown)
r = Reserved bit
bit 15-14
bit 13-12
bit 10
bit 9-8
bit 7
bit 5
FCKSM<1:0>: Fail-safe Clock Monitor (FSCM) and Clock Switch Configuration bits
1x = FSCM and Clock Switching are disabled
01 = Clock Switching is enabled, FSCM is disabled
00 = Clock Switching and FSCM are enabled
FPBDIV<1:0>: Peripheral Bus Clock divisor default value
11 = PBCLK is SYSCLK divided by 8
10 = PBCLK is SYSCLK divided by 4
01 = PBCLK is SYSCLK divided by 2
00 = PBCLK is SYSCLK divided by 1
OSCIOFNC: CLKO Enable Configuration bit
1 = CLKO output signal active on the OSCO pin; primary oscillator must be disabled or configured for
the External Clock mode (EC) for the CLKO to be active (POSCMD<1:0> = 11 or = 00)
0 = CLKO output disabled
POSCMD<1:0>: Primary Oscillator Configuration bits
11 = Primary Oscillator Disabled
10 = HS mode
01 = XT Mode
00 = EC Mode
IESO: Internal External Clock Switchover Select bit
1 = Internal External Clock Switchover mode enabled; Two-Speed Start-up mode
0 = Internal External Clock Switchover mode disabled; Single-Speed Start-up mode
FSOSCEN: Secondary Oscillator Enable bit
1 = Enable secondary oscillator
0 = Disable secondary oscillator
© 2008 Microchip Technology Inc.
Preliminary
DS61143E-page 65