18F8680 datasheet(84/496 Pages) MICROCHIP

84 / 496 page

PIC18F6585/8585/6680/8680

DS30491C-page 82

 2004 Microchip Technology Inc.

4.14

RCON Register

The Reset Control (RCON) register contains flag bits

that allow differentiation between the sources of a

device Reset. These flags include the TO, PD, POR,

BOR and RI bits. This register is readable and writable.

RCON REGISTER

Note 1: It is recommended that the POR bit be set

after

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’ (assum-

ing that POR was set to ‘1’ by software

immediately after POR).

R/W-0

U-0

R/W-1

R/W-0

IPEN

—

—RI

POR

BOR

bit 7

bit 0

bit 7

IPEN: Interrupt Priority Enable bit

= Enable priority levels on interrupts

= Disable priority levels on interrupts (PIC16CXXX Compatibility mode)

bit 6-5

Unimplemented: Read as ‘0’

bit 4

RI: RESET Instruction Flag bit

= The RESET instruction was not executed

= 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

= After power-up, CLRWDT instruction, or SLEEP instruction

= A WDT time-out occurred

bit 2

PD: Power-down Detection Flag bit

= After power-up or by the CLRWDT instruction

= By execution of the SLEEP instruction

bit 1

POR: Power-on Reset Status bit

= A Power-on Reset has not occurred

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

bit 0

BOR: Brown-out Reset Status bit

= A Brown-out Reset has not occurred

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

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

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