NTP53X2 datasheet(88/133 Pages) NXP

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NXP Semiconductors

NTP53x2

NTAG 5 link - NFC Forum-compliant I2C bridge

NTP53x2

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Product data sheet

Rev. 3.3 — 3 July 2020

COMPANY PUBLIC

544533

88 / 133

aaa-035482

READER

RF sends custom I2C read

command.

RF to I2C Master read communication sequences

RF polls for I2C Master

session registers to know

the current I2C

transaction status.

IC stores

the data

in SRAM.

IC initiates I2C

transaction. I2C Master

sends I2C read

command to the

specified slave address.

RF reads data

from SRAM.

I2C

INTERFACE

Figure 8. I2C Master read principle

8.2.3.8.1 WRITE I2C

Command code = D4h

WRITE I2C command is used to trigger an I2C master write command (R/W bit is 0b) on

the I2C bus.

Command parameters:

• I2C param contains I2C slave address and STOP condition option.

• Data length N byte codes the length of bytes to be sent to the slave. N+1 bytes need to

be put in the Data field and will be sent to the slave. E.g., to send one byte, 00h needs

to be coded.

• Data field contains the data to be sent to the I2C slave. Minimum number of bytes is 1

byte, maximum is 256 bytes.

If SRAM is read or write protected a valid authentication needs to be preceded.

Response to this command will follow immediately.

To check the status and result of the WRITE I2C command, I2C Master Status Registers

ADh should be checked (see Table 106).

Only Option_flag = 0b is supported.

Table 189. WRITE I2C request format

Flags

WRITE I2C

Manuf. code UID

I2C param

Data length

Data

CRC16

8 bits

64 bits

(optional)

8 bits

(N+1) x 8 bits 16 bits

Table 190. I2C param byte

I2C param bit Status

Value Description

STOP condition will be generated at the end of transaction

Disable STOP condition

STOP condition will be omitted at the end of transaction

6 to 0

I2C Address

xxh

7-bit I2C slave address of connected slave

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