Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller TQFP 80 (12x12) 8-Bit 64 MHz I/O number 69

PIC18F87K22 FAMILY

DS39960D-page 74  2009-2011 Microchip Technology Inc.

R/W-0 R/W-1 R/W-1 R/W-1 R-1 R-1 R/W-0 R/W-0

IPEN SBOREN CM

RI TO PD POR BOR

bit 7 bit 0

Legend:

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 7 IPEN: Interrupt Priority Enable bit

1 = Enable priority levels on interrupts

0 = Disable priority levels on interrupts (PIC16CXXX Compatibility mode)

bit 6 SBOREN: BOR Software Enable bit

If BOREN<1:0> =

01:

1 = BOR is enabled

0 = BOR is disabled

If BOREN<1:0> =

00, 10 or 11:

Bit is disabled and read as ‘0’.

bit 5 CM:

Configuration Mismatch Flag bit

1 = A Configuration Mismatch Reset has not occurred

0 = A Configuration Mismatch Reset has occurred (must be set in software after a Configuration

Mismatch Reset occurs)

bit 4 RI

: RESET Instruction Flag bit

1 = The RESET instruction was not executed (set by firmware only)

0 = The RESET instruction was executed causing a device Reset (must be set in software after a

Brown-out Reset occurs)

bit 3 TO: Watchdog Time-out Flag bit

1 = Set by power-up, CLRWDT instruction or SLEEP instruction

0 = A WDT time-out occurred

bit 2 PD

: Power-Down Detection Flag bit

1 = Set by power-up or by the CLRWDT instruction

0 = Set by execution of the SLEEP instruction

bit 1 POR

: Power-on Reset Status bit

1 = A Power-on Reset has not occurred (set by firmware only)

0 = A Power-on Reset occurred (must be set in software after a Power-on Reset occurs)

bit 0 BOR

: Brown-out Reset Status bit

1 = A Brown-out Reset has not occurred (set by firmware only)

0 = A Brown-out Reset occurred (must be set in software after a Brown-out Reset occurs)

Note 1: It is recommended that the POR

bit be set after a Power-on Reset has been detected, so that subsequent

Power-on Resets may be detected.

2: Brown-out Reset is said to have occurred when BOR

is ‘0’ and POR is ‘1’ (assuming that POR was set to

‘1’ by software immediately after a Power-on Reset).