DSPIC33FJMC202ESS datasheet(61/330 Pages) MICROCHIP

61 / 330 page

DS70283K-page 61

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304

6.0

RESETS

The Reset module combines all reset sources and

controls the device Master Reset Signal, SYSRST. The

following is a list of device Reset sources:

• POR: Power-on Reset

• BOR: Brown-out Reset

•MCLR: Master Clear Pin Reset

•SWR: RESET Instruction

• WDTO: Watchdog Timer Reset

• CM: Configuration Mismatch Reset

• TRAPR: Trap Conflict Reset

• IOPUWR: Illegal Condition Device Reset

- Illegal Opcode Reset

- Uninitialized W Register Reset

- Security Reset

A simplified block diagram of the Reset module is

shown in Figure 6-1.

Any active source of reset will make the SYSRST

signal active. On system Reset, some of the registers

associated with the CPU and peripherals are forced to

a known Reset state and some are unaffected.

All types of device Reset sets a corresponding status

bit in the RCON register to indicate the type of Reset

(see Register 6-1).

A POR clears all the bits, except for the POR bit

(RCON<0>), that are set. The user application can set

or clear any bit at any time during code execution. The

RCON bits only serve as status bits. Setting a particular

Reset status bit in software does not cause a device

Reset to occur.

The RCON register also has other bits associated with

the Watchdog Timer and device power-saving states.

The function of these bits is discussed in other sections

of this manual.

FIGURE 6-1:

RESET SYSTEM BLOCK DIAGRAM

Note 1: This data sheet summarizes the features

of the dsPIC33FJ32MC202/204 and

dsPIC33FJ16MC304 family of devices. It

is not intended to be a comprehensive

reference source. To complement the

information in this data sheet, refer to

Section 8. “Reset” (DS70192) of the

“dsPIC33F/PIC24H Family Reference

Manual”, which is available from the

Microchip web site (www.microchip.com).

2: Some registers and associated bits

described in this section may not be

available on all devices. Refer to

Section 4.0 “Memory Organization” in

this data sheet for device-specific register

and bit information.

Note:

Refer to the specific peripheral section or

Section 3.0 “CPU” of this manual for

Note:

The status bits in the RCON register

should be cleared after they are read so

that the next RCON register value after a

device Reset is meaningful.

MCLR

VDD

Internal

Regulator

BOR

Sleep or Idle

RESET Instruction

WDT

Module

Glitch Filter

Trap Conflict

Illegal Opcode

Uninitialized W Register

SYSRST

VDD Rise

Detect

POR

Configuration Mismatch

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