PIC18F4610T-I/ML【PDF 172/234 页】IC MCU FLASH 32KX16 44QFN

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Sheet目录3878

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PIC18F2X1X/4X1X

DS39636D-page 44

2009 Microchip Technology Inc.

REGISTER 4-1:

RCON: RESET CONTROL REGISTER

R/W-0

R/W-1(1)

U-0

R/W-1

R-1

R/W-0(2)

R/W-0

IPEN

SBOREN

—RI

POR

BOR

bit 7

bit 0

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 BOREN1:BOREN0 = 01:

1 = BOR is enabled

0 = BOR is disabled

If BOREN1:BOREN0 = 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 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(2)

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: The SBOREN bit is only available when the BOREN1:BOREN0 Configuration

bits = 01; otherwise, it is disabled and reads as ‘0’. See Section 4.4 “Brown-out

Reset (BOR)”.

2: The actual Reset value of POR is determined by the type of device Reset. See the

notes following this register and Section 4.6 “Reset State of Registers” for

additional information.

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

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 POR).

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