PIC18F23K22-ESLASHML datasheet(60/496 Pages) MICROCHIP

60 / 496 page

PIC18(L)F2X/4XK22

DS41412C-page 60

Preliminary

 2010 Microchip Technology Inc.

RCON: RESET CONTROL REGISTER

R/W-0/0

R/W-q/u

U-0

R/W-1/q

R-1/q

R/W-q/u

R/W-0/q

IPEN

SBOREN(1)

—RI

POR(2)

BOR

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

‘1’ = Bit is set

‘0’ = Bit is cleared

-n/n = Value at POR and BOR/Value at all other Resets

x = Bit is unknown

u = unchanged

q = depends on condition

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(1)

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

Unimplemented: Read as ‘0’

bit 4

RI: RESET Instruction Flag bit

1 = The RESET instruction was not executed (set by firmware or Power-on Reset)

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

code-executed 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(2)

1 = No Power-on Reset occurred

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(3)

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

0 = A Brown-out Reset occurred (must be set by firmware after a POR or Brown-out Reset occurs)

Note 1:

When CONFIG2L[2:1] = 01, then the SBOREN Reset state is ‘1’; otherwise, it is ‘0’.

The actual Reset value of POR is determined by the type of device Reset. See the notes following this

See Table .

Note 1: Brown-out Reset is indicated when BOR is ‘0’ and POR is ‘1’ (assuming that both POR and BOR were set

to ‘1’ by firmware immediately after POR).

2: 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.

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