The PIC16F15243 extends the 152xx family to 20 pins: 3.5 KB of flash, 256 bytes of SRAM and eighteen I/O lines under peripheral pin selection, with a 12-plus-2 channel ADC and SMBus-compatible pads. It is the I/O-rich entry point of the generation, common in small appliance and lighting boards where switch mapping matters more than memory. When its code protection is set, our replicate locked PIC16F15243 software service recovers and duplicates the image from hardware you own.

Protection through partitioned flash

As across the family, program flash is divided into application, boot and storage area blocks with independent protection settings, plus a device information area that stays accessible for factory data. Replication starts by reading that layout: a unit whose application block alone is closed may still yield its parameter tables, while a fully locked part requires the non-destructive route – read what answers, document what does not, and leave the erase that would clear protection firmly alone. Every replicate locked PIC16F15243 software job follows that order.

Eighteen lines of I/O are the design

With this much pin flexibility, the software encodes decisions that a schematic alone cannot recover: which peripheral sits on which pin, how switch scans are ordered, what the lighting or relay sequences look like. That is why our verification goes beyond checksums – a bench fixture drives the recovered image through its input scan and watches the outputs against the donor board’s behaviour, so the clone is proven as a controller, not just as a file. Customers receive the comparison note with the delivery, which turns their acceptance test into a short confirmation rather than a debugging session. Remanence-related background for older arrays appears in the clone microcontroller memory content remanence reference, and general lawful-access principles in the unlock microcontroller embedded memory guide.

Input scans and relay timing under test

Eighteen I/O lines in an appliance or lighting board usually mean a scanned key matrix or banked relay control, and both are timing-sensitive in ways that a byte-level clone does not automatically preserve. Scan intervals live in timer constants; relay sequencing lives in state tables; and a clone that gets either wrong behaves well on the bench and badly in the field. Our verification drives the recovered image with simulated key presses across the scan period and watches relay transitions against the donor’s timing signature, catching order-of-operations errors that no checksum reveals. The comparison trace ships with the report, so if your engineers later lengthen a debounce window deliberately, they know which constant to move and what the donor’s original value was.

Lighting-era retrofits

A recurring case for this part is the dimmer or controller whose maker has moved on: the board works, the firmware inside is the only specification of its dimming curves and failure fallbacks, and every replacement chip needs those exact tables. We recover them with the annotation that matters here – which table drives which output channel at which line phase – because dimming behaviour is the one thing a generic replacement cannot fake. Deliveries for these jobs include the curve data extracted alongside the binary, which lets a repair shop document its work for the building’s maintenance file rather than just swapping a chip and hoping.

Spares strategy after a recovery

A verified image changes the spares conversation from scarcity to planning. With the master file annotated, blank parts can be programmed in whatever quantity stock allows, and the question becomes shelf-life rather than availability. We advise on matching order codes – temperature grades and package suffixes matter on the 20-pin family – and our duplication pipeline holds the master so future batches program identically without resubmitting the donor. Fleets that adopted this model stopped paying emergency sourcing premiums entirely, because the once-scarce chip became an ordinary stocked line item with a documented programming procedure attached.

Duplication

Verified images are programmed into matching 20-pin blanks with configuration words restored and read-back comparison on every unit, through the MCU flash EEPROM data cloning pipeline. Bounded jobs are described on the partial microcontroller chip cloning page.

Family links

The 7 KB sibling is on the PIC16F15244 microcontroller page, and the firmware-instruction background referenced across this generation is in the microcontroller firmware instruction guide.

Scope

Only devices you own or are authorised to service are accepted, with records kept per job. Send the locked PIC16F15243 and we will confirm the package, quote a fixed fee, and return a verified image ready for replication.