DESCRIPTION
It is compatible to EM4469/4569 family. Comparing to EM4469/4569 family the changes are the following: New configuration bit co25 which inverts data input to encoder is introduced. Writing to Protection Word is modified. The IC is powered by picking the energy from a continuous 125 kHz magnetic field via an external coil, which together with the integrated capacitor form a resonant circuit. The IC read out data from its internal EEPROM and sends it out by switching on and off a resistive load in parallel to the coil. Commands and EEPROM data updates can be executed by 100% AM modulation of the 125 kHz magnetic field. There are several data rate and data encoding options available. Options are stored in EEPROM Configuration word. Read and write access to EEPROM can be protected by 32 bit password. All EEPROM words can be write protected by setting lock bits which transform them in read-only. It contains factory programmed and locked 32 bit UID number, chip type and customer code.
EM Microelectronic