Sixteen K Words On Sixty-Four Pins
The PIC16F1527 doubles the PIC16F1526: 16,384 words of flash (0x0000-0x3FFF), 1,536 bytes of SRAM, and the same extraordinary digital set – fifty-four I/O lines, thirty channels of ten-bit ADC, two EUSARTs, two MSSPs and ten CCP modules. No CWG, no EEPROM; the top 128 words of the array (0x3F80-0x3FFF) are the High-Endurance Flash window. Products built on it are the largest lighting engines and multi-axis controllers in the 8-bit PIC16 space.
Lock And Sweep
CONFIG1 at 0x8007 with the single CP bit; ID at 0x8006. Rules:
– 0x0000-0x3FFF: array, 0x000 under CP, 0xFFFF when erased. – 0x3F80-0x3FFF: HEF, inside the sweep, annotated separately. – Above 0x3FFF: unmapped, 0x000.
The 16K boundary is the only difference from the 1526 sweep; the ID word confirms which member the package carries before the boundary is set.
What The Image Contains
With 1.5 KB of SRAM the 1527 runs real structure: multiple ring buffers, a state machine, and often a command protocol on the second EUSART. The listing organizes into the CCP farm (ten time bases), the thirty-channel scan layer, the dual serial fabric, and the constants/HEF region at the top. On locked parts the array reads 0x000; the configuration word read at session start records the lock and oscillator setup that a faithful clone must reproduce.
The Session
With ten capture-compare blocks and thirty ADC channels, the review is organised by channel rather than by address: each CCP is traced from its period register to the pin it drives, and each ADC channel to the input it samples. The array read itself is straightforward – 16K words in blocks – and is finished before the channel mapping begins.
Deliverables
HEX file at word addresses, annotated disassembly with the CCP farm, scan, serial and HEF regions labeled, configuration report, checksum tied to the die. Clone policy documented as found and applied.
Fifty-Four Pins, 16K Words
The PIC16F1527 is the top of the 152x line: 16,384 words of flash, 1,536 bytes of SRAM, 30 ADC channels across 54 pins, ten CCP modules, two EUSART, two MSSP, and a charge time measurement unit. It is a fan-out part – the pin count exists to drive many outputs and read many sensors at once, and images for it are consequently dominated by table-driven I/O code.
Ten Capture Compare Blocks
Ten CCP modules mean ten independent PWM or capture channels, and firmware that uses them writes a repeating ladder of period and duty registers. In the disassembly that ladder is the easiest landmark on the whole image: once it is located, the surrounding code separates into per-channel setup, a scheduler that updates duty values, and the measurement path that reads the capture results.
– Flash: 0x0000-0x3FFF (16K words), 0x3FFF erased, 0x0000 protected. – Configuration: 0x8007-0x8008, device ID 0x8006.
Heat And Handling
Fifty-four pins in a TQFP mean a large die in a thin package, and boards that drive relays or triacs from this part run warm. Parts pulled from such boards sometimes have marginal solder joints rather than silicon faults; the session checks continuity on all supply pins before reading, because a floating VSS pin produces intermittent reads that look like protection artefacts.
Output
HEX at word addresses, annotated disassembly with the CCP ladder and the CTMU block labelled, configuration report, checksum tied to the die. The part is returned unmodified.
Sending The Board
Wide TQFP boards are usually shipped whole. Note whether the outputs drive mains-referenced loads, because that decides whether the part is lifted or read in place with an isolated supply.
Delivery
The report lists each CCP channel against the pin it drives, which on a 54-pin part is a table of ten rows and is usually the first page a client reads.
To submit a locked 1527, use the services desk or the contact form with the part marking and the board’s function.