The memory contains a total of 2048 bits, organized as 32 64-bit pages. Write operations are designed to complete in less than three milliseconds (ms). The endurance rating for the memory is 100,000 write cycles per byte. This device supports these security features: password checking, data locking, a oneway counter and a guaranteed unique serial number. The AT88RF020 includes an on-chip internal tuning capacitor that enables it to operate with a single external coil antenna. This antenna completes the RFID channel. Figure 1. Block Diagram