PIC18LF4331T-E/SO View Datasheet(PDF) - Microchip Technology

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Description

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PIC18LF4331T-E/SO

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

Microchip Technology

PIC18LF4331T-E/SO Datasheet PDF : 392 Pages

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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)

VDD

MCLR

INTERNAL POR

PWRT TIME-OUT

OST TIME-OUT

INTERNAL RESET

TPWRT

TOST

FIGURE 5-4:

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

VDD