This application note highlights the key differences of RF addressing modes between the products of the ISO/IEC 15693 STMicroelectronics family, which is composed of the dual interface EEPROM products (M24LRx) and the long range contactless products (LRix). The memory size is a key point and has an impact on some specific parameters of the RF (Radio frequency) commands.
This document highlights the key differences in RF addressing modes between the dual-interface EEPROM products (M24LRx) and the long-range contactless products (LRix) within the STMicroelectronics ISO/IEC 15693 family. It explains how memory size impacts specific RF command parameters.
The note details the distinction between low-density devices, which use a 1-byte block number parameter, and high-density devices, which require a 2-byte extended addressing mode. It provides tables comparing IC references, memory mapping, and specific RF command formats for both product types.
| Document Revision | Rev 1 |
|---|---|
| Publication Date | March 2012 |
Low-density products use a 1-byte block number parameter, while high-density products require a 2-byte extended addressing mode.
High-density products require using 2 bytes to define the block number parameter.
The M24LR64-R device has a memory size of 64 Kbits.
The fourth bit of the Request_flags byte is the protocol extension bit used to define the number of bytes of the block number parameter.