NTP53X2 datasheet(103/133 Pages) NXP

103 / 133 page

NXP Semiconductors

NTP53x2

NTAG 5 link - NFC Forum-compliant I2C bridge

NTP53x2

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 3.3 — 3 July 2020

COMPANY PUBLIC

544533

103 / 133

• REGDAT: 8-bit register data to read/write

• STOP: Stop condition as defined in Section 8.3.1.1.2

aaa-035478

Read Data

HOST

START SL_AD

BL_AD1

SLAVE

Write Data

HOST

SLAVE

START SL_AD W

BL_AD0

REGA

SL_AD R

STOP

BL_AD1

BL_AD0

REGA

MASK

REGDATA

STOP

START

REGDATA

STOP

A/N

Figure 11. READ REGISTER and WRITE REGISTER command

8.3.1.5 Error Handling

In case of any detected error, NTAG 5 link in slave mode responds with a NACK:

• Memory Write

– EEPROM

generated on the fourth data byte if the block is not writable

– SRAM

generated on the first byte if the block is not writable

– Arbiter locked to NFC interface, or

– EEP cycle ongoing, or

– I2C interface disabled

generate on block address BL_AD0

• Memory Read

– EEPROM/SRAM

returned data will be FFh if the access is to restricted region

– Arbiter locked to NFC interface, or

– EEP cycle ongoing, or

– I2C interface disabled

generate on block address BL_AD0

• Register Access

Registers are always accessible. NACK will only be generated:

– DATA NACK due to register write command to trigger system reset

– NACK for register read/write command on BL_AD0 if I2C interface is disabled

8.3.2 Event detection

The event detection feature provides the capability to trigger an external device (e.g.,

µController) or switch on the connected circuitry by an external power management unit

depending on activities on the NFC interface. On top this active low pin can be used as

one of the two possible PWM channels to offer I2C and PWM functionality.

As the event detection pin functionality is operated via NFC field power, VCC supply for

the IC itself is only required when ED pin is used as PWM channel.

NOTE: In some cases VOUT pin might be used as field detection trigger.

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