PIC24FJ64GA004-IPT Datasheet, PDF (36/52 Pages) Microchip Technology – PIC24FJXXXGA0XX Flash Programming Specification

PIC24FJXXXGA0XX
TABLE 5-1: PROGRAMMING EXECUTIVE COMMAND SET
Opcode
Mnemonic
Length
(16-bit words)
Time-out
Description
0h SCHECK
1
1 ms Sanity check.
1h READC
3
1 ms Read an 8-bit word from the specified Device ID register.
2h READP
4
1 ms/row Read N 24-bit instruction words of code memory starting from
the specified address.
3h RESERVED
N/A
N/A
This command is reserved. It will return a NACK.
4h PROGC
4
5 ms Write an 8-bit word to the specified Device ID registers.
5h PROGP
99
5 ms Program one row of code memory at the specified address,
then verify.⁽¹⁾
7h RESERVED
N/A
N/A
This command is reserved. It will return a NACK.
8h RESERVED
N/A
N/A
This command is reserved. It will return a NACK.
9h RESERVED
N/A
N/A
This command is reserved. It will return a NACK.
Ah QBLANK
3
TBD Query if the code memory is blank.
Bh QVER
1
1 ms Query the programming executive software version.
Dh PROGW
4
5 ms Program one instruction word of code memory at the specified
address, then verify.
Legend: TBD = To Be Determined
Note 1: One row of code memory consists of (64) 24-bit words. Refer to Table 2-3 for device-specific information.
5.2.4 COMMAND DESCRIPTIONS
All commands supported by the programming executive
are described in Section 5.2.5 “SCHECK Command”
through Section 5.2.12 “QVER Command”.
5.2.5 SCHECK COMMAND
15
12 11
Opcode
0
Length
Field
Opcode
0h
Length
1h
Description
The SCHECK command instructs the programming
executive to do nothing but generate a response. This
command is used as a “Sanity Check” to verify that the
programming executive is operational.
Expected Response (2 words):
1000h
0002h
Note:
This instruction is not required for
programming but is provided for
development purposes only.
DS39768D-page 36
© 2008 Microchip Technology Inc.