DSPIC33EV64GM102-I/SO View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

DSPIC33EV64GM102-I/SO

16-Bit, 5V Digital Signal Controllers with PWM, SENT, Op Amps and Advanced Analog Features

Microchip Technology 

dsPIC33EVXXXGM00X/10X FAMILY

4.3.2 EXTENDED X DATA SPACE

The lower portion of the base address space range,

between 0x0000 and 0x2FFF, is always accessible

regardless of the contents of the Data Space Page

registers; it is indirectly addressable through the

register indirect instructions. It can be regarded as

being located in the default EDS Page 0 (i.e., EDS

address range of 0x000000 to 0x002FFF with the base

address bit, EA<15> = 0, for this address range).

However, Page 0 cannot be accessed through the

upper 32 Kbytes, 0x8000 to 0xFFFF, of Base Data

Space, in combination with DSRPAG = 0x000 or

DSWPAG = 0x000. Consequently, the DSRPAG and

DSWPAG registers are initialized to 0x001 at Reset.

Note 1: DSxPAG should not be used to access

Page 0. An EDS access with DSxPAG

set to 0x000 will generate an address

error trap.

2: Clearing the DSxPAG in software has no

effect.

FIGURE 4-12:

EDS MEMORY MAP

EA<15:0>

0x0000

Conventional

DS Address

0x8000

0xFFFF

SFR/DS

DS

(PAGE 0)

The remaining pages, including both EDS and PSV

pages, are only accessible using the DSRPAG or

DSWPAG registers in combination with the upper

32 Kbytes, 0x8000 to 0xFFFF, of the base address,

where the base address bit, EA<15> = 1.

For example, when DSRPAG = 0x001 or

DSWPAG = 0x001, accesses to the upper 32 Kbytes,

0x8000 to 0xFFFF of the Data Space, will map to the

EDS address range of 0x008000 to 0x00FFFF. When

DSRPAG = 0x002 or DSWPAG = 0x002, accesses to

the upper 32 Kbytes of the Data Space will map to the

EDS address range of 0x010000 to 0x017FFF and so

on, as shown in the EDS memory map in Figure 4-12.

For more information on the PSV page access using

Data Space Page registers, refer to Section 5.0

“Program Space Visibility from Data Space” in

“dsPIC33E/PIC24E Program Memory” (DS70000613)

of the “dsPIC33/PIC24 Family Reference Manual”.

PAGE 1

PAGE 2

PAGE 3

0x008000

0x010000

0x018000

DSRPAG<9> = 0

EDS EA Address (24 bits)

PAGE 1FD

PAGE 1FE

PAGE 1FF

0xFE8000

0xFF0000

0xFF8000

(DSRPAG<8:0>, EA<14:0>)

(DSWPAG<8:0>, EA<14:0>)

DS70005144E-page 72

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