DSPIC33EP128GS708 datasheet(351/484 Pages) MICROCHIP

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 2016-2018 Microchip Technology Inc.

DS70005258C-page 351

dsPIC33EPXXXGS70X/80X FAMILY

27.0 SPECIAL FEATURES

The

dsPIC33EPXXXGS70X/80X

family

devices

include several features intended to maximize

application flexibility and reliability, and minimize cost

through elimination of external components. These are:

• Flexible Configuration

• Watchdog Timer (WDT)

• Code Protection and CodeGuard™ Security

• JTAG Boundary Scan Interface

• In-Circuit Serial Programming™ (ICSP™)

• In-Circuit Emulation

• Brown-out Reset (BOR)

27.1

Configuration Bits

In dsPIC33EPXXXGS70X/80X family devices, the

Configuration Words are implemented as volatile

memory. This means that configuration data must be

programmed each time the device is powered up.

Configuration data is stored at the end of the on-chip

program memory space, known as the Flash Configura-

tion Words. Their specific locations are shown in

Table 27-1 with detailed descriptions in Table 27-2. The

configuration data is automatically loaded from the Flash

Configuration Words to the proper Configuration

Shadow registers during device Resets.

For devices operating in Dual Partition Flash modes, the

BSEQx bits (FBTSEQ<11:0>) determine which panel is

the Active Partition at start-up and the Configuration

Words from that panel are loaded into the Configuration

Shadow registers.

When creating applications for these devices, users

should always specifically allocate the location of the

Flash Configuration Words for configuration data in

their code for the compiler. This is to make certain that

program code is not stored in this address when the

code is compiled. Program code executing out of

configuration space will cause a device Reset.

Note:

This data sheet summarizes the features of

the dsPIC33EPXXXGS70X/80X family of

devices. It is not intended to be a compre-

hensive reference source. To complement

the information in this data sheet, refer to

“Device Configuration” (DS70000618),

“Watchdog Timer and Power-Saving

Modes” (DS70615) and “CodeGuard™

Intermediate Security” (DS70005182) in

the “dsPIC33/PIC24 Family Reference

Manual”, which is available from the

Microchip website (www.microchip.com).

Note:

Configuration data is reloaded on all types

of device Resets.

Note:

Performing a page erase operation on the

last page of program memory clears the

Flash Configuration Words.

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