Self-programming ROM for store data

Hi to all,
I need to realize a standalone sensor with DA14580. ARM Cortex M0 read external sensor and transmit measurement to remote device by Ble.
In my particular application the MCU power off entire circuit after some seconds.
然而在断电之前,单片机不ed to save some bytes of data to memory.
Instead of using an external EEProm, it would be possible to write data to internal ROM? If yes, what is the maximum number of read-write cycles that the memory is able to make before breaking down?