PIC18F2331-E/ML MICROCHIP [Microchip Technology], PIC18F2331-E/ML Datasheet - Page 47

• Manufacturer Part Number: PIC18F2331-E/ML
• Description: 28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High-Performance PWM and A/D
• Manufacturer: MICROCHIP [Microchip Technology]

5.0
The PIC18F2331/2431/4331/4431 devices differentiate
between various kinds of Reset:
a)
b)
c)
d)
e)
f)
g)
h)
FIGURE 5-1:
 2010 Microchip Technology Inc.
Note 1: See
OSC1
MCLR
V
DD
Power-on Reset (POR)
MCLR Reset during normal operation
MCLR Reset during Sleep
Watchdog Timer (WDT) Reset (during
execution)
Programmable Brown-out Reset (BOR)
RESET Instruction
Stack Full Reset
Stack Underflow Reset
RESET
Instruction
RESET
INTRC
OST/PWRT
Pointer
32 s
Stack
Table 5-1
Brown-out
( )_IDLE
V
Time-out
Detect
DD
Sleep
Reset
WDT
Rise
OST
PWRT
Stack Full/Underflow Reset
SIMPLIFIED BLOCK DIAGRAM OF ON-CHIP RESET CIRCUIT
External Reset
for time-out situations.
MCLRE
10-Bit Ripple Counter
11-Bit Ripple Counter
POR Pulse
BOREN
1024 Cycles
65.5 ms
PIC18F2331/2431/4331/4431
This section discusses Resets generated by MCLR,
POR and BOR, and the operation of the various start-
up timers. Stack Reset events are covered in
Section 6.1.2.4 “Stack Full/Underflow
WDT Resets are covered in
Timer
A simplified block diagram of the On-Chip Reset Circuit
is shown in
(WDT)”.
Figure
5-1.
S
R
Section 23.2 “Watchdog
DS39616D-page 47
Q
Enable OST
Enable PWRT
Chip_Reset
Resets”.
(1)