PIC24FJ64GA004-IPT Datasheet, PDF (37/52 Pages) Microchip Technology – PIC24FJXXXGA0XX Flash Programming Specification

5.2.6 READC COMMAND
15
12 11
87
0
Opcode
Length
N
Addr_MSB
Addr_LS
Field
Description
Opcode
Length
N
Addr_MSB
Addr_LS
1h
3h
Number of 8-bit Device ID registers to
read (max. of 256)
MSB of 24-bit source address
Least Significant 16 bits of 24-bit
source address
The READC command instructs the programming
executive to read N or Device ID registers, starting from
the 24-bit address specified by Addr_MSB and
Addr_LS. This command can only be used to read 8-bit
or 16-bit data.
When this command is used to read Device ID
registers, the upper byte in every data word returned by
the programming executive is 00h and the lower byte
contains the Device ID register value.
Expected Response (4 + 3 * (N – 1)/2 words for N odd):
1100h
2+N
Device ID Register 1
...
Device ID Register N
Note:
Reading unimplemented memory will
cause the programming executive to
reset. Please ensure that only memory
locations present on a particular device
are accessed.
PIC24FJXXXGA0XX
5.2.7 READP COMMAND
15
12 11
87
0
Opcode
Length
N
Reserved
Addr_MSB
Addr_LS
Field
Description
Opcode
2h
Length
4h
N
Number of 24-bit instructions to read
(max. of 32768)
Reserved 0h
Addr_MSB MSB of 24-bit source address
Addr_LS
Least Significant 16 bits of 24-bit
source address
The READP command instructs the programming
executive to read N 24-bit words of code memory,
including Configuration Words, starting from the 24-bit
address specified by Addr_MSB and Addr_LS. This
command can only be used to read 24-bit data. All data
returned in response to this command uses the packed
data format described in Section 5.2.2 “Packed Data
Format”.
Expected Response (2 + 3 * N/2 words for N even):
1200h
2 + 3 * N/2
Least significant program memory word 1
...
Least significant data word N
Expected Response (4 + 3 * (N – 1)/2 words for N odd):
1200h
4 + 3 * (N – 1)/2
Least significant program memory word 1
...
MSB of program memory word N (zero padded)
Note:
Reading unimplemented memory will
cause the programming executive to
reset. Please ensure that only memory
locations present on a particular device
are accessed.
© 2008 Microchip Technology Inc.
DS39768D-page 37