PIC18F25J50 MICROCHIP [Microchip Technology], PIC18F25J50 Datasheet - Page 68

• Manufacturer Part Number: PIC18F25J50
• Description: 28/44-Pin, Low-Power, High-Performance USB Microcontrollers with nanoWatt XLP Technology
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F46J50 FAMILY
5.7
Most registers are unaffected by a Reset. Their status
is unknown on POR and unchanged by all other
Resets. The other registers are forced to a “Reset
state” depending on the type of Reset that occurred.
Most registers are not affected by a WDT wake-up,
since this is viewed as the resumption of normal
operation. Status bits from the RCON register (CM, RI,
TABLE 5-1:
DS39931D-page 68
Power-on Reset
RESET instruction
Brown-out Reset
Configuration Mismatch Reset
MCLR Reset during
power-managed Run modes
MCLR Reset during
power-managed Idle modes and
Sleep mode
MCLR Reset during full-power
execution
Stack Full Reset (STVREN = 1)
Stack Underflow Reset
(STVREN = 1)
Stack Underflow Error (not an
actual Reset, STVREN = 0)
WDT time-out during full-power
or power-managed Run modes
WDT time-out during
power-managed Idle or Sleep
modes
Interrupt exit from
power-managed modes
Legend: u = unchanged
Note 1:
Reset State of Registers
When the wake-up is due to an interrupt and the GIEH or GIEL bit is set, the PC is loaded with the
interrupt vector (0008h or 0018h).
Condition
STATUS BITS, THEIR SIGNIFICANCE AND THE INITIALIZATION CONDITION FOR
RCON REGISTER
Counter
Program
PC + 2
PC + 2
0000h
0000h
0000h
0000h
0000h
0000h
0000h
0000h
0000h
0000h
0000h
(1)
CM
1
u
1
0
u
u
u
u
u
u
u
u
u
RI
1
0
1
u
u
u
u
u
u
u
u
u
u
RCON Register
TO, PD, POR and BOR) are set or cleared differently in
different Reset situations, as indicated in
These bits are used in software to determine the nature
of the Reset.
Table 5-2
Special Function Registers. These are categorized by
POR and BOR, MCLR and WDT Resets and WDT
wake-ups.
TO
1
u
1
u
1
1
u
u
u
u
0
0
u
describes the Reset states for all of the
PD
1
u
1
u
u
0
u
u
u
u
u
0
0
POR
0
u
u
u
u
u
u
u
u
u
u
u
u
 2011 Microchip Technology Inc.
BOR
0
u
0
u
u
u
u
u
u
u
u
u
u
STKFUL STKUNF
STKPTR Register
0
u
u
u
u
u
u
1
u
u
u
u
u
Table
0
u
u
u
u
u
u
u
1
1
u
u
u
5-1.