DSPIC33FJ06GS201TESLASHMM datasheet(83/346 Pages) MICROCHIP

83 / 346 page

Preliminary

DS70318D-page 81

dsPIC33FJ06GS101/X02 and dsPIC33FJ16GSX02/X04

5.0

FLASH PROGRAM MEMORY

The dsPIC33FJ06GS101/X02 and dsPIC33FJ16GSX02/

X04 devices contain internal Flash program memory for

storing and executing application code. The memory is

readable, writable and erasable during normal operation

over the entire VDD range.

Flash memory can be programmed in two ways:

• In-Circuit Serial Programming™ (ICSP™)

programming capability

• Run-Time Self-Programming (RTSP)

ICSP

allows

dsPIC33FJ06GS101/X02

and

dsPIC33FJ16GSX02/X04

device

serially

programmed while in the end application circuit. This is

done with two lines for programming clock and

programming data (one of the alternate programming

pin pairs: PGECx/PGEDx, and three other lines for

power (VDD), ground (VSS) and Master Clear (MCLR).

This allows customers to manufacture boards with

unprogrammed devices and then program the digital

signal controller just before shipping the product. This

also allows the most recent firmware or a custom

firmware to be programmed.

RTSP is accomplished using TBLRD (table read) and

TBLWT

(table write) instructions. With RTSP, the user

application can write program memory data, either in

blocks or ‘rows’ of 64 instructions (192 bytes) at a time,

or a single program memory word, and erase program

memory in blocks or ‘pages’ of 512 instructions

(1536 bytes) at a time.

5.1

Table Instructions and Flash

Programming

Regardless of the method used, all programming of

Flash memory is done with the table read and table

write instructions. These allow direct read and write

access to the program memory space from the data

memory while the device is in normal operating mode.

The 24-bit target address in the program memory is

formed using bits<7:0> of the TBLPAG register and the

Effective Address (EA) from a W register specified in

the table instruction, as shown in Figure 5-1.

The TBLRDL and the TBLWTL instructions are used to

read or write to bits<15:0> of program memory.

TBLRDL

and TBLWTL can access program memory in

both Word and Byte modes.

The TBLRDH and TBLWTH instructions are used to read

or write to bits<23:16> of program memory. TBLRDH

and TBLWTH can also access program memory in Word

or Byte mode.

FIGURE 5-1:

ADDRESSING FOR TABLE REGISTERS

Note:

This data sheet summarizes the features

the

dsPIC33FJ06GS101/X02

and

dsPIC33FJ16GSX02/X04

families

devices. It is not intended to be a

comprehensive reference source. To

complement the information in this data

sheet, refer to the “dsPIC33F Family

Reference Manual”

, Section 5. “Flash

Programming”

(DS70191), which is

available from the Microchip web site

(www.microchip.com).

Program Counter

24 bits

Program Counter

TBLPAG Reg

8 bits

Working Reg EA

16 bits

Byte

24-bit EA

1/0

Select

Using

Table Instruction

Using

User/Configuration

Space Select

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