dsPIC33F Microchip Technology, dsPIC33F Datasheet - Page 71

• Manufacturer Part Number: dsPIC33F
• Description: (dsPIC24H / dsPIC33F) Flash Programming Specification
• Manufacturer: Microchip Technology

6.2
After
programmed to executive memory using ICSP, it must
be verified. Verification is performed by reading out the
contents of executive memory and comparing it with
the image of the programming executive stored in the
programmer.
TABLE 6-2:
© 2007 Microchip Technology Inc.
Step 1: Exit the Reset vector.
Step 2: Initialize TBLPAG and the read pointer (W6) for TBLRD instruction.
Step 3: Initialize the write pointer (W7) to point to the VISI register.
Step 4: Read and clock out the contents of the next two locations of executive memory through the VISI register
Step 5: Reset the device internal PC.
Step 6: Repeat Steps 4-5 until all 2048 instruction words of executive memory are read.
Command
(Binary)
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0001
0000
0000
0000
0001
0000
0000
dsPIC33F/PIC24H PROGRAMMING SPECIFICATION
the
Programming Verification
using the REGOUT command.
programming
READING EXECUTIVE MEMORY
000000
000000
040200
000000
200800
880190
EB0300
207847
000000
BA1B96
000000
000000
<VISI>
BA9BB6
000000
000000
<VISI>
040200
000000
(Hex)
Data
executive
NOP
NOP
GOTO
NOP
MOV
MOV
CLR
MOV
NOP
TBLRDL [W6], [W7]
NOP
NOP
Clock out contents of VISI register
TBLRDH [W6++], [W7]
NOP
NOP
Clock out contents of VISI register
GOTO
NOP
0x200
#0x80, W0
W0, TBLPAG
W6
#VISI, W7
0x200
has
been
Preliminary
Reading the contents of executive memory can be
performed using the same technique described in
Section 5.8 “Reading Code Memory”. A procedure
for reading executive memory is shown in Table 6-2.
Note that in Step 2, the TBLPAG register is set to 0x80,
such that executive memory may be read.
Description
DS70152D-page 71