DSPIC33F datasheet(52/80 Pages) MICROCHIP

52 / 80 page

dsPIC33F/PIC24H PROGRAMMING SPECIFICATION

DS70152D-page 52

Preliminary

4.2.10

PROGW

COMMAND

The PROGW command instructs the programming exec-

utive to program one word of code memory (3 bytes) to

the specified memory address.

After the word has been programmed to code memory,

the programming executive verifies the programmed

data against the data in the command.

Expected Response (2 words):

0x1600

0x0002

4.2.11

QBLANK

COMMAND

The QBLANK command queries the programming exec-

utive to determine if the contents of code memory are

blank (contains all ‘1’s). The size of code memory to

check must be specified in the command.

The Blank Check for code memory begins at 0x0 and

advances toward larger addresses for the specified

number of instruction words.

QBLANK returns a QE_Code of 0xF0 if the specified

code memory and code-protect bits are blank;

otherwise, QBLANK returns a QE_Code of 0x0F.

Expected Response (2 words for blank device):

0x1AF0

0x0002

Expected Response (2 words for non-blank device):

0x1A0F

0x0002

12 11

8 7

Opcode

Length

Reserved

Addr_MSB

Addr_LS

Data_LS

Reserved

Data_MSB

Field

Description

Opcode

0x6

Length

0x5

Reserved

0x0

Addr_MSB

MSB of 24-bit destination address

Addr_LS

Least Significant 16 bits of 24-bit

destination address

Data_MSB

MSB of 24-bit data

Data_LS

Least Significant 16 bits of 24-bit

data

12 11

Opcode

Length

PSize

Field

Description

Opcode

0xA

Length

0x2

PSize

Length of program memory to check

(in 24-bit words) +1, up to a max of

49152

Note:

The QBLANK command does not check

the system operation Configuration bits

since these bits are not set to ‘1’ when a

Chip Erase is performed.

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