NCD1015M (Data Sheet Rev. A) The NCD1015M is a read/write module to be used in HDX contact-less RFID devices for single transponder applications in the area of electronic animal identification, operating in the low frequency (134.2 kHz) range, and supporting ISO 11784/85 standards.
The NCD1015M contains an ASIC and 2 internal capacitors: one, a resonant capacitor, and the other a storage capacitor. The ASIC contains 4 memory blocks of 33 bits each, based on field programmable, non-volatile EEPROM. Each block contains 32 data bits (bit 1 ... bit 32). Each of the blocks can be write-protected through an associated lock bit, which is bit 0 of the corresponding block. Blocks 1 and 2 are referred to as the 64-bit identification data page 1 which is secured by an associated 16-bit CRC. Blocks 0 and 7 contain configuration parameters, as well as the option to irreversibly lock the RFID device.
The HDX transponder IC receives Write-Block requests from the reader as a pulse interval encoded, 100% amplitude modulated data signal.
Return data transmission from the transponder to the reader utilizes FSK encoded modulation. This is achieved by a serial data stream controlled Frequency Shift Keying (FSK) of the transponder's resonant circuit oscillation with an additional on-chip modulation capacitor between the two transponder terminals HF and GND. The passive transponder uses the supplied RF signal to obtain the energy needed to send the 64-bit ID code to the reader..