DSPIC30F1010-30I/SP【PDF 47/66 页】IC DSPIC MCU/DSP 6K 28DIP

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2010 Microchip Technology Inc.

DS70102K-page 51

dsPIC30F Flash Programming Specification

11.11 Reading Configuration Memory

The procedure for reading configuration memory is

similar to the procedure for reading code memory,

except that 16-bit data words are read instead of 24-bit

words. Since there are seven Configuration registers,

they are read one register at a time.

Table 11-11 shows the ICSP programming details for

reading all of the configuration memory. Note that the

TBLPAG register is hard-coded to 0xF8 (the upper byte

address of configuration memory), and the read pointer

W6 is initialized to 0x0000.

TABLE 11-11: SERIAL INSTRUCTION EXECUTION FOR READING ALL CONFIGURATION MEMORY

Command

(Binary)

Data

(Hexadecimal)

Description

Step 1: Exit the Reset vector.

0000

040100

000000

GOTO 0x100

NOP

Step 2: Initialize TBLPAG, and the read pointer (W6) and the write pointer (W7) for TBLRD instruction.

0000

200F80

880190

EB0300

EB0380

000000

MOV

#0xF8, W0

MOV

W0, TBLPAG

CLR

NOP

Step 3: Read the Configuration register and write it to the VISI register (located at 0x784).

0000

BA0BB6

000000

883C20

000000

TBLRDL [W6++], [W7]

NOP

MOV

W0, VISI

NOP

Step 4: Output the VISI register using the REGOUT command.

0001

0000

<VISI>

000000

Clock out contents of VISI register

NOP

Step 5: Reset device internal PC.

0000

040100

000000

GOTO 0x100

NOP

Step 6: Repeat steps 3-5 six times to read all of configuration memory.

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