M24SR 데이터 시트보기 (PDF) - STMicroelectronics

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M24SR

Dynamic NFC/RFID tag IC with 2-Kbit EEPROM, NFC Forum Type 4 Tag and I²C interface

STMicroelectronics 

Functional description

M24SR02-Y

Table 1. Signal names

Signal name

Function

Direction

SDA

SCL

AC0, AC1

Serial data

Serial clock

Antenna coils

I/O

Input

-

VCC

VSS

GPO

RF disable

Supply voltage

Ground

Interrupt output (1)

Disable the RF communication (2)

-

-

Open drain output

Input

1. An external pull-up > 4.7 kΩ is required.

2. An external pull-down is required when the voltage on Vcc is above its POR level.

Figure 2. 8-pin package connections

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1. See Package mechanical data section for package dimensions, and how to identify pin 1.

069

1.1

1.1.1

1.1.2

Functional modes

The M24SR02-Y has two functional modes available. The difference between the modes

lies in the power supply source (see Table 2).

Modes

I2C mode

Tag mode

Dual interface mode

Table 2. Functional modes

Supply source

Comments

Vcc

RF field only

RF field or Vcc

The I2C interface is available

The I2C interface is disconnected

Both I2C and RF interfaces are available

I2C mode

M24SR02-Y is powered by VCC. The I2C interface is connected to the M24SR02-Y. The I2C

host can communicate with the M24SR02-Y device.

Tag mode

The M24SR02-Y is supplied by the RF field and can communicate with an RF host (RFID

reader or an NFC phone). The User memory can only be accessed by the RF commands.

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DocID025386 Rev 10

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