PCM18XT0 Microchip Technology, PCM18XT0 Datasheet - Page 50
![MODULE PROC PIC18F4685](/photos/8/96/89696/pcm18xt0_sml.jpg)
PCM18XT0
Manufacturer Part Number
PCM18XT0
Description
MODULE PROC PIC18F4685
Manufacturer
Microchip Technology
Datasheet
1.PCM18XT0.pdf
(484 pages)
Specifications of PCM18XT0
Accessory Type
Processor Module
Product
Microcontroller Modules
Core Processor
PIC18F4685
Lead Free Status / RoHS Status
Not applicable / Not applicable
For Use With/related Products
ICE2000
For Use With
ICE2000 - EMULATOR MPLAB-ICE 2000 POD
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Not applicable / Not applicable
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PIC18F2682/2685/4682/4685
4.6
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, RI, TO,
TABLE 4-3:
DS39761C-page 50
Power-on Reset
RESET instruction
Brown-out Reset
MCLR during power-managed Run
modes
MCLR during power-managed Idle
modes and Sleep mode
WDT time-out during full power or
power-managed Run modes
MCLR 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
power-managed Idle or Sleep modes
Interrupt exit from
power-managed modes
Legend: u = unchanged
Note 1:
2:
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 (008h or 0018h).
Reset state is ‘1’ for POR and unchanged for all other Resets when software BOR is enabled
(BOREN1:BOREN0 Configuration bits = 01 and SBOREN = 1); otherwise, the Reset state is ‘0’.
Condition
STATUS BITS, THEIR SIGNIFICANCE AND THE INITIALIZATION CONDITION FOR
RCON REGISTER
Program
PC + 2
Counter
PC + 2
0000h
0000h
0000h
0000h
0000h
0000h
0000h
0000h
0000h
0000h
(1)
SBOREN
u
u
u
u
u
u
u
u
u
u
u
1
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
PD, POR and BOR, are set or cleared differently in
different Reset situations, as indicated in Table 4-3.
These bits are used in software to determine the nature
of the Reset.
Table 4-4 describes the Reset states for all of the
Special Function Registers. These are categorized by
Power-on and Brown-out Resets, Master Clear and
WDT Resets and WDT wake-ups.
RCON Register
RI
1
0
1
u
u
u
u
u
u
u
u
u
TO
1
u
1
1
1
0
u
u
u
u
0
u
PD
1
u
1
u
0
u
u
u
u
u
0
0
POR BOR STKFUL
0
u
u
u
u
u
u
u
u
u
u
u
© 2009 Microchip Technology Inc.
0
u
0
u
u
u
u
u
u
u
u
u
STKPTR Register
0
u
u
u
u
u
u
1
u
u
u
u
STKUNF
0
u
u
u
u
u
u
u
1
1
u
u
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