AN3002 Datasheet, PDF (1/22 Pages) STMicroelectronics – Description of the M24LRxx-R and M24LRxxE-R dual interface

AN3002
Application note
Description of the M24LRxx-R and M24LRxxE-R dual interface
memory’s password protection mechanism
Description
The M24LRxx-R or M24LRxxE-R device is a dual-interface, electrically erasable
programmable memory (EEPROM). It features an I²C interface and can be operated from a
V_CC power supply. It is also a contactless memory powered by the received electromagnetic
carrier wave.
The M24LRxx-R or M24LRxxE-R is organized as 8192 × 8 bits in the I²C mode and as 2048
× 32 bits in the ISO 15693 and ISO 18000-3 mode 1 RF mode.
Figure 1. M24LRxx block diagram
Note:
EEPROM
AC0
AC1
RF
RF V_CC
Latch
Logic
Power management
I²C
Contact V_CC
SCL
SDA
V_CC
V_SS
Table 1 lists the products concerned by this application note.
ai15123
Table 1. Applicable products
Type
Applicable products
Dual interface EEPROMs M24LRxx-R, M24LRxxE-R
The standard M24LRxx-R and energy-harvesting M24LRxxE-R devices will be referred to
as M24LRxx devices throughout the document.
October 2012
Doc ID 15912 Rev 2
1/22
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