Datasheet

PIC16(L)F720/721

DS40001430E-page 72  2010-2013 Microchip Technology Inc.

U-1 R/P-1 U-1 U-1 R/P-1 R/P-1

— PLLEN — —BOREN1BOREN0

bit 13 bit 8

U-1 R/P-1 R/P-1 R/P-1 R/P-1 U-1 R/P-1 R/P-1

—CPMCLRE PWRTE WDTEN —FOSC1FOSC0

bit 7 bit 0

Legend: P = Programmable bit

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

bit 13 Unimplemented: Read as ‘1’

bit 12 PLLEN: INTOSC PLL Enable bit

0 = INTOSC frequency is up to 500 kHz (Max. MFINTOSC)

1 = INTOSC frequency is up to 16 MHz (Max. HFINTOSC)

bit 11-10 Unimplemented: Read as ‘1’

bit 9-8 BOREN<1:0>: Brown-out Reset Enable bits

(1)

0x = Brown-out Reset disabled

10 = Brown-out Reset enabled during operation and disabled in Sleep

11 = Brown-out Reset enabled

bit 7 Unimplemented: Read as ‘1’

bit 6 CP: Flash Program Memory Code Protection bit

0 = Program Memory code protection is enabled

1 = Program Memory code protection is disabled

bit 5 MCLRE: MCLR

/VPP Pin Function Select bit

1 =MCLR

/VPP pin function is MCLR; Weak pull-up enabled.

0 =MCLR

/VPP pin function is digital input; MCLR internally disabled; Weak pull-up disabled

bit 4 PWRTE

: Power-up Timer Enable bit

0 = PWRT enabled

1 = PWRT disabled

bit 3 WDTEN: Watchdog Timer Enable bit

0 = WDT disabled

1 = WDT enabled

bit 2 Unimplemented: Read as ‘1’

bit 1-0 FOSC<1:0>: Oscillator Selection bits

11 = EC oscillator: CLKOUT function on CLKOUT pin, and CLKIN function on CLKIN pin

10 = EC oscillator: I/O function on CLKOUT pin, and CLKIN function on CLKIN pin

01 = INTOSC oscillator: CLKOUT function on CLKOUT pin, and I/O function on CLKIN pin

00 = INTOSCIO oscillator: I/O function on CLKOUT pin, and I/O function on CLKIN pin

Note 1: Fixed Voltage Reference is automatically enabled whenever the BOR is enabled.