PIC18LF1320-I/SOSQTP データシートの表示（PDF） - Microchip Technology

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PIC18LF1320-I/SOSQTP

18/20/28-Pin High-Performance, Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology

Microchip Technology 

PIC18F1220/1320

5.14 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.

REGISTER 5-3: RCON REGISTER

R/W-0

U-0

U-0

IPEN

—

—

bit 7

Note 1: If the BOR configuration bit is set (Brown-

out Reset enabled), the BOR bit is ‘1’ on

a Power-on Reset. After a Brown-out

Reset has occurred, the BOR bit will be

cleared and must be set by firmware to

indicate the occurrence of the next

Brown-out Reset.

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.

R/W-1

R-1

RI

TO

R-1

R/W-0 R/W-0

PD

POR

BOR

bit 0

bit 7

bit 6-5

bit 4

bit 3

bit 2

bit 1

bit 0

IPEN: Interrupt Priority Enable bit

1 = Enable priority levels on interrupts

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

Unimplemented: Read as ‘0’

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)

TO: Watchdog Time-out Flag bit

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

0 = A WDT time-out occurred

PD: Power-down Detection Flag bit

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

0 = Cleared by execution of the SLEEP instruction

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)

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)

Legend:

R = Readable bit

-n = Value at POR

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared x = Bit is unknown

DS39605F-page 56

© 2007 Microchip Technology Inc.

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