PIC32MX220F032B-I/SO 데이터 시트보기 (PDF) - Microchip Technology

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PIC32MX220F032B-I/SO

32-bit Microcontrollers (up to 128 KB Flash and 32 KB SRAM) with Audio and Graphics Interfaces, USB, and Advanced Analog

Microchip Technology 

PIC32MX1XX/2XX

REGISTER 8-3: REFOCON: REFERENCE OSCILLATOR CONTROL REGISTER

bit 7-4 Unimplemented: Read as ‘0’

bit 3-0 ROSEL<3:0>: Reference Clock Source Select bits(1)

1111 = Reserved; do not use

•

•

•

1001 = Reserved; do not use

1000 = REFCLKI

0111 = System PLL output

0110 = USB PLL output

0101 = SOSC

0100 = LPRC

0011 = FRC

0010 = POSC

0001 = PBCLK

0000 = SYSCLK

Note 1:

2:

3:

The ROSEL and RODIV bits should not be written while the ACTIVE bit is ‘1’, as undefined behavior may

result.

This bit is ignored when the ROSEL<3:0> bits = 0000 or 0001.

While the ON bit is set to ‘1’, writes to these bits do not take effect until the DIVSWEN bit is also set to’1’.

DS61168C-page 102

Preliminary

© 2011 Microchip Technology Inc.

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