Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller SOIC 28 16-Bit 32 MHz I/O number 21

PIC24FJXXXGA0XX

5.2.6 READC COMMAND

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

5.2.7 READP COMMAND

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)

15 12 11 8 7 0

Opcode Length

NAddr_MSB

Addr_LS

Field Description

Opcode 1h

Length 3h

N Number of 8-bit Device ID registers to

read (max. of 256)

Addr_MSB MSB of 24-bit source address

Addr_LS Least Significant 16 bits of 24-bit

source address

Note: Reading unimplemented memory will

cause the programming executive to

reset. Please ensure that only memory

locations present on a particular device

are accessed.

15 12 11 8 7 0

Opcode Length

Reserved Addr_MSB

Addr_LS

Field Description

Opcode 2h

Length 4h

N Number of 24-bit instructions to read

(max. of 32768)

Reserved 0h