DSPIC33F datasheet(61/80 Pages) MICROCHIP

61 / 80 page

Preliminary

DS70152D-page 61

dsPIC33F/PIC24H PROGRAMMING SPECIFICATION

FIGURE 5-7:

PROGRAM CODE MEMORY FLOW

0000

0001

807600

887840

000000

<VISI>

Externally time ‘P13’ msec

(see Section TABLE 8-1: “AC/DC

Characteristics and Timing Requirements”

) to allow suffi-

cient time for the Row Program operation to complete.

MOV

NVMCON, W0

MOV

W0, VISI

NOP

Clock out contents of VISI register. Repeat until the WR bit

is clear.

Step 9: Reset device internal PC.

0000

040200

000000

GOTO

0x200

NOP

Step 10: Repeat steps 3-9 until all code memory is programmed.

TABLE 5-5:

SERIAL INSTRUCTION EXECUTION FOR WRITING CODE MEMORY (CONTINUED)

Command

(Binary)

Data

(Hex)

Description

Start Write Sequence

All

locations

done?

Done

Start

Yes

Load 2 Bytes

to Write

Buffer at <Addr>

All

bytes

written?

Yes

and Poll for WR bit

to be cleared

N = 1

LoopCount = 0

Configure

Device for

Writes

N = 1

LoopCount =

LoopCount + 1

N = N + 1

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