PIC18C658 MICROCHIP [Microchip Technology], PIC18C658 Datasheet - Page 64
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PIC18C658
Manufacturer Part Number
PIC18C658
Description
High-Performance Microcontrollers with CAN Module
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18C658.pdf
(366 pages)
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PIC18CXX8
4.13.1
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 4-3:
DS30475A-page 64
RCON REGISTER
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
RCON REGISTER
IPEN: Interrupt Priority Enable bit
1 = Enable priority levels on interrupts
0 = Disable priority levels on interrupts (16CXXX compatibility mode)
LWRT: Long Write Enable bit
1 = Enable TBLWT to internal program memory
0 = Disable TBLWT to internal program memory; TBLWT only to external program memory
Unimplemented: Read as '0'
RI: RESET Instruction Flag bit
1 = The RESET instruction was not executed
0 = The RESET instruction was executed causing a device RESET
TO: Watchdog Time-out Flag bit
1 = After power-up, CLRWDT instruction, or SLEEP instruction
0 = A WDT time-out occurred
PD: Power-down Detection Flag bit
1 = After power-up or by the CLRWDT instruction
0 = By execution of the SLEEP instruction
POR: Power-on Reset Status bit
1 = A Power-on Reset has not occurred
0 = A Power-on Reset occurred
BOR: Brown-out Reset Status bit
1 = A Brown-out Reset has not occurred
0 = A Brown-out Reset occurred
Legend:
R = Readable bit
- n = Value at POR
bit 7
R/W-0
IPEN
Once this bit is set, it can only be cleared by a POR or MCLR Reset
(must be set in software after a Brown-out Reset occurs)
(must be set in software after a Power-on Reset occurs)
(must be set in software after a Brown-out Reset occurs)
R/W-0
LWRT
Advanced Information
U-0
W = Writable bit
’1’ = Bit is set
—
R/W-1
RI
Note 1: If the BOREN configuration bit is set, BOR
2: It is recommended that the POR bit be set
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
R/W-1
is ’1’ on Power-on Reset. If the BOREN
configuration bit is clear, BOR is unknown
on Power-on Reset.
The BOR status bit is a “don't care” and is
not
brown-out circuit is disabled (the BOREN
configuration bit is clear). BOR must then
be set by the user and checked on subse-
quent RESETs to see if it is clear, indicat-
ing a brown-out has occurred.
after a Power-on Reset has been
detected, so that subsequent Power-on
Resets may be detected.
TO
necessarily
R/W-1
2000 Microchip Technology Inc.
PD
x = Bit is unknown
predictable
R/W-0
POR
R/W-0
BOR
if
bit 0
the
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