PIC16F707 View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16F707

40/44-Pin, Flash Microcontrollers with nanoWatt XLP and mTouch™ Technology

Microchip Technology 

PIC16F707/PIC16LF707

3.0 RESETS

The PIC16F707/PIC16LF707 differentiates between

various kinds of Reset:

a) Power-on Reset (POR)

b) WDT Reset during normal operation

c) WDT Reset during Sleep

d) MCLR Reset during normal operation

e) MCLR Reset during Sleep

f) Brown-out Reset (BOR)

Some registers are not affected in any Reset condition;

their status is unknown on POR and unchanged in any

other Reset. Most other registers are reset to a “Reset

state” on:

• Power-on Reset (POR)

• MCLR Reset

• MCLR Reset during Sleep

• WDT Reset

• Brown-out Reset (BOR)

Most registers are not affected by a WDT wake-up

since this is viewed as the resumption of normal

operation. TO and PD bits are set or cleared differently

in different Reset situations, as indicated in Table 3-3.

These bits are used in software to determine the nature

of the Reset.

A simplified block diagram of the On-Chip Reset Circuit

is shown in Figure 3-1.

The MCLR Reset path has a noise filter to detect and

ignore small pulses. See Section 25.0 “Electrical

Specifications” for pulse width specifications.

FIGURE 3-1:

SIMPLIFIED BLOCK DIAGRAM OF ON-CHIP RESET CIRCUIT

MCLRE

MCLR/VPP

VDD

WDT

Module

Sleep

WDT

Time-out

Reset

POR

Brown-out(1)

Reset

Power-on Reset

BOREN

OSC1/

CLKIN

OST/PWRT

OST

10-bit Ripple Counter

PWRT

WDTOSC

11-bit Ripple Counter

Chip_Reset

Note 1: Refer to the Configuration Word Register 1 (Register 8-1).

Enable PWRT

Enable OST

 2010 Microchip Technology Inc.

Preliminary

DS41418A-page 29

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