M24SR 데이터 시트보기 (PDF) - STMicroelectronics

부품명

상세내역

제조사

M24SR

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

STMicroelectronics 

Signal descriptions

M24SR02-Y

2.7.1

The user can select one of these configurations(1):

• SessionOpen: an RF or I2C session is ongoing.

• MIP (NDEF Message updating In Progress): the RF host is writing an NDEF length

different from 0x0000. This mode can be used to detect when the RF host changes the

NDEF message as defined by the NFC Forum.

• WIP (Writing In Progress): the M24SR02-Y is executing a writing operation.

• INT (interrupt): the I2C or RF host can force the M24SR02-Y to send a negative pulse

on the GPO pin.

• I2C ready response: an I2C response is ready to be read by the I²C host.

• State mode: the I2C or RF host can control the state of the GPO pad during the RF

session.

• RF busy: an RF host is communicating with the M24SR02-Y.

Session Open configuration (GPO field = 0xX1 or 0x1X)

When the GPO is configured as "Session Open", it goes to the Low state when an RF or I2C

session is ongoing (see Figure 3).

An RF session is taken when M24SR02-Y receives a valid Select Application. The session

is released after M24SR02-Y has received a valid Deselect command, if M24SR02-Y has

received a Kill RF session command in I2C or when the RF field became OFF.

An I2C session is taken when M24SR02-Y receives a valid Get session command or a valid

Kill RF session command. The session is released after M24SR02-Y has received I2C token

release sequence or after a Power Off.

GPO is driven low after a delay (1) or (3) when the session is open.

GPO is released after a delay (2) or (4) when the session is released.

Figure 3. GPO configured as Session Open (GPO field = 0xX1 or 0x1X)

^ĞƐƐŝŽŶ

'WKĂƐ^ĞƐƐŝŽŶKƉĞŶ

Z&^ĞƐƐŝŽŶ

;ϭͿ

;ϮͿ

/Ϯ^ĞƐƐŝŽŶ

;ϯͿ

;ϰͿ

Z&

^ĞƐƐŝŽŶ

1. CmdEOFtoGPlow (RF command End of frame to GPORF Session pad low)

2. CmdEOFtoGPHZ (RF command End of frame to GPORF Session pad HZ)

3. CmdSTPtoGPlow (I2C command stop to GPO low)

4. AnswerlbLBtoGPHZ (I2C answer last bit of last byte to GPO HZ)

14/90

1. See Table 81 for more details.

DocID025386 Rev 10

D^ϯϬϳϴϰsϮ

Share Link: