dsPIC30F2012 datasheet(49/206 Pages) MICROCHIP

49 / 206 page

DS70139F-page 49

dsPIC30F2011/2012/3012/3013

5.0

FLASH PROGRAM MEMORY

The dsPIC30F family of devices contains internal

program Flash memory for executing user code. There

are two methods by which the user can program this

memory:

Run-Time Self-Programming (RTSP)

In-Circuit Serial Programming™ (ICSP™)

5.1

In-Circuit Serial Programming

(ICSP)

dsPIC30F devices can be serially programmed while in

the end application circuit. This is simply done with two

lines for Programming Clock and Programming Data

(which are named PGC and PGD respectively), 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 microcontroller just before shipping

the product. This also allows the most recent firmware

or a custom firmware to be programmed.

5.2

Run-Time Self-Programming

(RTSP)

RTSP is accomplished using TBLRD (table read) and

TBLWT (table write) instructions.

With RTSP, the user may erase program memory, 32

instructions (96 bytes) at a time and can write program

memory data, 32 instructions (96 bytes) at a time.

5.3

Table Instruction Operation

Summary

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

Word or Byte mode.

The TBLRDH and TBLWTH instructions are used to read

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

and TBLWTH can access program memory in Word or

Byte mode.

A 24-bit program memory address 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.

FIGURE 5-1:

ADDRESSING FOR TABLE AND NVM REGISTERS

Note:

This data sheet summarizes features of

this group of dsPIC30F devices and is not

intended to be a complete reference

source. For more information on the CPU,

peripherals, register descriptions and

general device functionality, refer to the

“dsPIC30F Family Reference Manual”

(DS70046). For more information on the

device instruction set and programming,

refer to the “dsPIC30F/33F Programmer’s

Reference Manual” (DS70157).

Program Counter

24 bits

NVMADRU Reg

8 bits

16 bits

Program

Using

TBLPAG Reg

8 bits

Working Reg EA

16 bits

Using

Byte

24-bit EA

1/0

Select

Table

Instruction

NVMADR

Addressing

Counter

Using

NVMADR Reg EA

User/Configuration

Space Select

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