How can a 51822 QFAB have more than 128kb?

[Flagada15]

Hi all!

I recently ordered BLE tag with nrf51822 QFAB chips.

When I read back the memory content (with mem8 jlink command) I manage to read up to the address 24A60 which means 150112 bytes.

So my question is how can it be possible to have more than 128kb in a QFAB chip? I am wrong somewhere?

Thanks in advance for your answer

[Susheel Nuguru]

Like Roger said, this could be one of those chips that could have failed yield test on some memory locations and then sold as chips with lower memory. This is common in semiconductor industry.