NTP53X2 datasheet(77/133 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

77 / 133

• Mutual Authentication (MAM1, MAM2)

After receiving a valid AUTHENTICATE command, NTAG 5 link calculates the response

and as soon as the calculation is finalized, the response with the result of the crypto

calculation (b3 flag is set) is sent. Only for tag authentication the calculation result is

additionally stored in the response buffer (b2 flag is set).

NTAG 5 link supports the Crypto Suite AES128 as defined in ISO/IEC 29167-10.

Option_flag = 0b and Option_flag = 1b is supported and is in accordance with ISO/IEC

15693 write-alike commands.

Table 156. AUTHENTICATE request format

Flags

AUTHENTICATE UID

CSI

Message

CRC16

8 bits

64 bits (optional)

8 bits

Depending on

TAM1 (96 bit),

MAM1 (96 bit) or

MAM2 (136 bit)

16 bits

Table 157 defines the response of NTAG 5 link to an AUTHENTICATE command.

For more detailed information, refer to ISO/IEC 29167-10.

Table 157. AUTHENTICATE response format when Error_flag is NOT set(in process reply)

Flags

Barker Code

TResponse

CRC16

8 bits (b2 and b3 is set)

8 bits (Done flag is set)

Depending on TAM1 (128

bit), MAM1(176 bit) or MAM2

(0 bit)

16 bits

Table 158. AUTHENTICATE response format when Error_flag is set

Flags

Error Code

CRC16

8 bits

16 bits

Tag Authentication (TAM1)

Table 159 defines the message within the AUTHENTICATE command for tag

authentication (TAM1).

For more detailed information, refer to ISO/IEC 29167-10.

Table 159. Message format for TAM1

AuthMethode

CustomData

TAM1_RFU

KeyID

IChallenge_TAM1

# of bits

Description

00b

00000b

[7:0]

random interrogator challenge

Table 160 defines the response of NTAG 5 link to an AUTHENTICATE command.

For more detailed information, refer to ISO/IEC 29167-10.

Table 160. TResponse for TAM1

TResponse TAM1 (128 bit)

AES-ECB-ENC(Key[KeyID].ENC_key,C_TAM1[15:0] || TRnd_TAM1[31:0] || IChallenge_TAM1[79:0])

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