DSPIC33F datasheet(53/80 Pages) MICROCHIP

53 / 80 page

Preliminary

DS70152D-page 53

dsPIC33F/PIC24H PROGRAMMING SPECIFICATION

4.2.12

QVER

COMMAND

The QVER command queries the version of the

programming

executive

software

stored

test

memory. The “version.revision” information is returned

in the response’s QE_Code using a single byte with the

following format: main version in upper nibble and

revision in the lower nibble (i.e., 0x23 means

version 2.3 of programming executive software).

Expected Response (2 words):

0x1BMN (where “MN” stands for version M.N)

0x0002

4.3

Programming Executive

Responses

The programming executive sends a response to the

programmer for each command that it receives. The

response indicates if the command was processed

correctly. It includes any required response data or

error data.

The programming executive response set is shown in

Table 4-2. This table contains the opcode, mnemonic

and description for each response. The response format

is described in Section 4.3.1 “Response Format”.

TABLE 4-2:

PROGRAMMING EXECUTIVE

RESPONSE OPCODES

4.3.1

RESPONSE FORMAT

All programming executive responses have a general

format consisting of a two-word header and any

required data for the command.

4.3.1.1

Opcode Field

The opcode is a 4-bit field in the first word of the

response. The opcode indicates how the command

was processed (see Table 4-2). If the command was

processed successfully, the response opcode is PASS.

If there was an error in processing the command, the

response opcode is FAIL and the QE_Code indicates

the reason for the failure. If the command sent to

the programming executive is not identified, the

programming executive returns a NACK response.

4.3.1.2

Last_Cmd Field

The Last_Cmd is a 4-bit field in the first word of

the response and indicates the command that the

programming executive processed. Since the program-

ming executive can only process one command at a

time, this field is technically not required. However, it

can be used to verify that the programming executive

correctly received the command that the programmer

transmitted.

12 11

Opcode

Length

Field

Description

Opcode

0xB

Length

0x1

Opcode

Mnemonic

Description

0x1

PASS

Command successfully

processed.

0x2

FAIL

Command unsuccessfully

processed.

0x3

NACK

Command not known.

Field

Description

Opcode

Response opcode.

Last_Cmd

Programmer command that

generated the response.

QE_Code

Query code or error code.

Length

Response length in 16-bit words

(includes 2 header words).

D_1

First 16-bit data word (if applicable).

D_N

Last 16-bit data word (if applicable).

12 11

8 7

Opcode

Last_Cmd

QE_Code

Length

D_1 (if applicable)

...

D_N (if applicable)

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