8.9.1 Functional
The Read User Zone command ($B2) allows reading of data from the device's currently selected user zone (the procedure for selecting a user zone is described in section 8.10 System Write: $B4).
The data byte address to be read is defined by Address 1 and Address 2 in the command and is internally incremented following the transmission of each data byte. The value N defines how many bytes CryptoMemory® will read; a value of zero will result in 256 bytes read. The host, however, may cease clocking the device and end the transmission with a NACK and stop at any time prior to receiving all N bytes. During a read operation, the address will roll over from the last byte of the current zone to the first byte of the same zone.
