The SRIX4K is a contactless memory powered by the received carrier electromagnetic wave. It is a 4096 bits user EEPROM fabricated with STMicroelectronics CMOS technology. The memory is organised as 128 blocks of 32 bits. The SRIX4K is accessed via the 13.56MHz carrier. Incoming data are demodulated and decoded from the received Amplitude Shift Keying modulation signal (ASK) and outgoing data are generated by load variation using Bit Phase Shift Keying coding (BPSK) of a 847kHz sub-carrier. The received ASK wave is 10% modulated. The Data transfer rate between the SRIX4K and the reader is 106Kbit/s in both reception and emission modes.
The SRIX4K follows the ISO 14443 part 2 type B recommendation for Radio frequency power and signal interface.
