PIC18LF4331-ESLASHML datasheet(51/392 Pages) MICROCHIP

Part #	PIC18LF4331-E/ML

Description	28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High-Performance PWM and A/D

PDF	392 Pages

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Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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51 / 392 page

 2010 Microchip Technology Inc.

DS39616D-page 51

PIC18F2331/2431/4331/4431

5.6

Reset State of Registers

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, PD, POR

and BOR) are set or cleared differently in different

Reset situations, as indicated in Table 5-2. These bits

are used in software to determine the nature of the

Reset.

Table 5-3 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.

FIGURE 5-3:

TIME-OUT SEQUENCE ON POWER-UP (MCLR TIED TO VDD, VDD RISE < TPWRT)

FIGURE 5-4:

TIME-OUT SEQUENCE ON POWER-UP (MCLR NOT TIED TO VDD): CASE 1

TPWRT

TOST

VDD

MCLR

INTERNAL POR

PWRT TIME-OUT

OST TIME-OUT

INTERNAL RESET

TPWRT

TOST

VDD

MCLR

INTERNAL POR

PWRT TIME-OUT

OST TIME-OUT

INTERNAL RESET

PIC18LF4331-E/ML Datasheet(PDF) 51 Page - Microchip Technology

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