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PIC18F8620 Datasheet

  • PIC18F8620

  • 64/80-Pin High-Performance,256 Kbit to 1 Mbit Enhanced Flash...

  • 380頁

  • Microchip   Microchip

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PIC18F6520/8520/6620/8620/6720/8720
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.
Note 1:
If the BOREN configuration bit is set
(Brown-out Reset enabled), the BOR bit
is 鈥?鈥?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.
REGISTER 4-4:
RCON REGISTER
R/W-0
IPEN
bit 7
U-0
鈥?/div>
U-0
鈥?/div>
R/W-1
RI
R/W-1
TO
R/W-1
PD
R/W-0
POR
R/W-0
BOR
bit 0
bit 7
IPEN:
Interrupt Priority Enable bit
1
= Enable priority levels on interrupts
0
= Disable priority levels on interrupts (PIC16CXXX Compatibility mode)
Unimplemented:
Read as 鈥?鈥?/div>
RI:
RESET
Instruction Flag bit
1
= The
RESET
instruction was not executed
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
= 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 (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
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
鈥?鈥?= Bit is set
U = Unimplemented bit, read as 鈥?鈥?/div>
鈥?鈥?= Bit is cleared
x = Bit is unknown
bit 6-5
bit 4
bit 3
bit 2
bit 1
bit 0
DS39609B-page 60
錚?/div>
2004 Microchip Technology Inc.

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