Hey,
I am currently implementing a firmware for a device using the TRF7962A. It should support the SLIX2 Privacy mode. Especially getting them out of it again
with a "GET-RANDOM" and a "SET-PASSWORD command without shutting of the rf field.
Before a command I set my Code Status Control to 0x21 / 0b00100001 to enable the rf field. After TX the command and RX the result the Code Status Control (when reading it directly from the TRF7962A) changed to 0x8F / 0b10001111 resulting in a disabled rf field.
This means I am unable to revive chips from privacy mode. Is there anything I have missed to keep the rf field on even after a command?
PS: With a proxmark3 as simulated tag it works fine, as it ignores if the rf field goes down. So the code for get-random/set-password is fine.