Техническая Спецификация для Microchip Technology MA320001
PIC32MX3XX/4XX
DS61143H-page 134
© 2011 Microchip Technology Inc.
bit 13-12 FPBDIV<1:0>: Peripheral Bus Clock Divisor Default Value bits
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
bit 11
Reserved: Write ‘1’
bit 10
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 (POSCMOD<1:0> = 11 OR 00)
0
= CLKO output disabled
bit 9-8
POSCMOD<1:0>: Primary Oscillator Configuration bits
11
= Primary oscillator disabled
10
= HS oscillator mode selected
01
= XT oscillator mode selected
00
= External clock mode selected
bit 7
IESO: Internal External Switchover bit
1
= Internal External Switchover mode enabled (Two-Speed Start-up enabled)
0
= Internal External Switchover mode disabled (Two-Speed Start-up disabled)
bit 6
Reserved: Write ‘1’
bit 5
FSOSCEN: Secondary Oscillator Enable bit
1
= Enable Secondary Oscillator
0
= Disable Secondary Oscillator
bit 4-3
Reserved: Write ‘1’
bit 2-0
FNOSC<2:0>: Oscillator Selection bits
111
= Fast RC Oscillator with divide-by-N (FRCDIV)
110
= FRCDIV16 Fast RC Oscillator with fixed divide-by-16 postscaler
101
= Low-Power RC Oscillator (LPRC)
100
= Secondary Oscillator (S
OSC
)
011
= Primary Oscillator with PLL module (XT+PLL, HS+PLL, EC+PLL)
010
= Primary Oscillator (XT, HS, EC)
(1)
001
= Fast RC Oscillator with divide-by-N with PLL module (FRCDIV+PLL)
000
= Fast RC Oscillator (FRC)
REGISTER 26-2:
DEVCFG1: DEVICE CONFIGURATION WORD 1 (CONTINUED)
Note 1:
Do not disable P
OSC
(POSCMOD = 00) when using this oscillator source.