nRF52832: nWRITE,BLOCK

[Adrian Meier]

Hi, we have some questions about the flash in the nRF52832.
In the datasheet is this nWRITE,BLOCK; Amount of writes allowed in a block between erase; Max 181

1. Does every word that is written to the flash count as 1? Or does it count as 1 if e.g. 20 bytes are written at once?
2. Does it count as 1 if we flip a bit from 1 to 0? So if we flip all bits of a word in an own write operation from 1 to 0, it counts as 32 writes?
3. Are record-based flash managers that manage record status with bit flipping unsuitable for this flash?

Best regards!

[run_ar]

1. Yes, every write regardless of length counts as 1 out of the 181 writes.

2. Yes, flipping 1 bit is considered a write. and flipping 32 bits in 32 write operations counts as 32 writes.

3. Depends on how often this is updated. We would normally use our Flash Data Storage (FDS) module. Note that there are other chips with slightly different flash limitations such as the nRF52840/833/820 -> Flash programming