Before anything is priced for copy PIC24FJ256DA110 protected program heximal, the device itself has to be identified: PIC24FJ256DA110 carries 256 KB (87,552 instruction words) of flash, 96 KB of SRAM and no data EEPROM in an 100-pin TQFP / 121-pin BGA body. The work starts with the FGS configuration register, because this generation treats the whole program array as one block controlled by a single code-protect field.

the first read in a copy PIC24FJ256DA110 protected program heximal job

The classic PIC24F generation treats on-chip program memory as a single block rather than a set of independently protected segments. Code protection for that block is controlled by the GCP field in the FGS configuration register: when it is programmed to the protected state it inhibits external reads and writes of program memory, while normal execution continues unaffected because the CPU fetches its own instructions internally. Write protection is controlled separately by GWRP, which blocks internal write and erase operations. The configuration words and the device identification registers remain readable, which is why a protected sample can still be identified. Clearing the code-protect field is not non-destructive: the programming specification states that a bulk erase in ICSP mode is the only way to return the bit, and that same operation removes the entire user program.

PIC24FJ256DA110 flash array and the configuration bit coupling

On the PIC24FJ256DA110 the 256 KB (87,552 instruction words) of flash sit beside 96 KB of SRAM and no data EEPROM in an 100-pin TQFP / 121-pin BGA body with 100 pins. Program memory uses 24-bit instruction words while the data sheet quotes capacity in kilobytes, so a heximal export has to preserve the word width and the configuration words at the top of the map rather than a byte-for-byte image. The 16-bit PIC24 core at 32 MHz and 16 MIPS with a graphics controller and USB On-The-Go fixes instruction timing, and the 100-pin footprint changes the number of available I/O lines and analog channels without changing the array size.

the PIC24FJ256DA110 programming interface once protection is set

In-circuit serial programming enters the device through the PGC and PGD pins with VPP on MCLR, and this generation also implements a JTAG boundary-scan interface for board-level testing. The legitimate routes are a clean read when both fields are open, a documented comparison against the customer’s archived build output, and a bulk erase authorised in writing by the owner because the program is lost in the same step. The realistic deliverable on a protected sample is therefore an identification and documentation package rather than a promise to alter the protection bits.

a decision tree for copy PIC24FJ256DA110 protected program heximal

Read the FGS configuration register first and record the code-protect and write-protect fields, because those bits settle whether the array can be returned and whether it can be rewritten. An unprotected sample yields a complete program heximal plus the configuration words; a protected sample yields identification data only unless the customer holds an archived build. The PIC24FJ256DA110 carries 256 KB (87,552 instruction words) of flash in an 100-pin TQFP / 121-pin BGA body, so the device number and the package settle the array before anything is priced. A 256 KB array with a 96 KB frame buffer in SRAM is what separates this graphics member from the 128 KB DA110. What survives the protection: the configuration words, the device identification registers, the SRAM and peripheral registers while the part runs, the package marking and the customer’s archived programming file.

sibling parts of the PIC24FJ256DA110

When a board carries only a partial marking, the wider PIC24F family is the place to look, because its members share the 24-bit instruction word, the FGS code-protect and write-protect fields, the JTAG boundary-scan port and the same bulk-erase coupling while differing in flash capacity, pin count, SRAM depth and on-chip peripherals. The PIC24FJ256DA210 family DS39969 pairs 128 KB or 256 KB of flash with 24 KB or 96 KB of SRAM for the frame buffer, in 64-pin, 100-pin and 121-pin bodies, all with a graphics controller and USB On-The-Go. The configuration words plus the package marking settle which member is on the board before any protection work begins.

Comparable recoveries are documented in microchip processor pic18f14k50 flash memory breaking, microcontroller pic18f13k50 flash memory attacking, microcontroller pic18f2439 code reverse engineering, microprocessor pic18f1330 flash data recovery and microprocessor pic18f2515 heximal file recovery, each starting from the configuration read.

closing out a copy PIC24FJ256DA110 protected program heximal request

For a board that arrived as a copy PIC24FJ256DA110 protected program heximal request, the deliverable is a confirmed memory size, a recorded code-protect and write-protect state and a priced route agreed in writing before any destructive step, and our engineers read the FGS configuration register first.

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