Chip had no EE, should PBP3 know that?

[aerostar]

This has according to https://www.microchip.com/wwwproducts/en/PIC16F15376

Flash Program Memory with self read/write capability, so you could use space at the end of the flash program memory for your data.

Alternatively why not use a 24lc64 or similar memory chip on your board

[mpgmike]

Microchip has a cool site to filter through all their offerings. Several PICs meet your criteria. Here is the link:

https://www.microchip.com/ParamChart...branchID=30048

[dsicon]

Microchip has a cool site to filter through all their offerings. Several PICs meet your criteria. Here is the link:

https://www.microchip.com/ParamChart...branchID=30048

thanks for that, what is "Emulated EEPROM in Flash" ?

[mpgmike]

High Endurance Flash (HEF).

EEPROMs have a limited number of times they can be written to; they can be read from infinitely, though. Flash has a VERY limited number of writes before it begins to corrupt the data. HEF is Flash, but is designed to be more robust than normal Flash. Using the Flash Write procedure, you can use HEF like you would EEPROM (almost).

Flash works differently than EEPROM in that you must erase entire blocks at a time. You cannot simply write to a single address repeatedly. Normal EEPROM procedures in PCB don't work with HEF. Read up on it.

I would suggest if you need to write to EEPROM addresses randomly & repeatedly, use a PIC with a genuine EEPROM.

[Ioannis]

I know you don't want to re-wire your board but serial SRAM is a good solution for no limit in writing but needs a battery backup to hold the data.

[aerostar]

24LC series is a possibility and does not need battery backup.

Serial EEPROM
• More than 1 Million Erase/Write Cycles - if that is enough
• Data Retention > 200 years

[Ioannis]

That million is valid for block write though...

[dsicon]

This has according to https://www.microchip.com/wwwproducts/en/PIC16F15376

Flash Program Memory with self read/write capability, so you could use space at the end of the flash program memory for your data.

Alternatively why not use a 24lc64 or similar memory chip on your board

Adding an external chip would require re-spinning the pcb. I thought about using WRITECODE and that might work but I worry about the endurance as I would like to write many times.