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NTP53X2 数据表(PDF) 75 Page - NXP Semiconductors

部件名 NTP53X2
功能描述  NTAG 5 link - NFC Forum-compliant I2C bridge
Download  133 Pages
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制造商  NXP [NXP Semiconductors]
网页  http://www.nxp.com
标志 NXP - NXP Semiconductors

NTP53X2 数据表(HTML) 75 Page - NXP Semiconductors

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NXP Semiconductors
NTP53x2
NTAG 5 link - NFC Forum-compliant I2C bridge
NTP53x2
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2020. All rights reserved.
Product data sheet
Rev. 3.3 — 3 July 2020
COMPANY PUBLIC
544533
75 / 133
8.2.3.3.9 ENABLE NFC PRIVACY
Command code = BAh
The ENABLE NFC PRIVACY command in plain password mode enables NFC PRIVACY
mode (see Section 8.7) for NTAG 5 link if the Privacy password is correct.
The XOR password has to be calculated with the password and two times the received
random number from the last GET RANDOM NUMBER command:
XOR_Password[31:0] = Password[31:0] XOR {Random_Number[15:0],
Random_Number[15:0]}.
To get out of the NFC PRIVACY mode, the valid Privacy password has to be transmitted
to the IC with the DISABLE NFC PRIVACY command.
The timing of the command is write alike.
Option_flag = 0b and Option_flag = 1b is supported and is in accordance with ISO/IEC
15693 write-alike commands.
NOTE: In AES mode, Mutual Authentication with Purpose_MAM2 = 1001b needs to be
executed to enable the NFC PRIVACY mode for NTAG 5 link.
Table 150. ENABLE NFC PRIVACY request format
Flags
SET
PASSWORD
IC Mfg
code
UID
XOR
password
CRC16
8 bits
8 bits
8 bits
64 bits
optional
32 bits
16 bits
Table 151. ENABLE NFC PRIVACY response format when Error_flag is NOT set
Flags
CRC16
8 bits
16 bits
Table 152. ENABLE NFC PRIVACY response format when Error_flag is set
Flags
Error Code
CRC16
8 bits
8 bits
16 bits
8.2.3.3.10 DISABLE NFC PRIVACY
Command code = B3h
The DISABLE NFC PRIVACY command moves the NTAG 5 link out of the NFC
PRIVACY mode.
Remark: The timing of the DISABLE PRIVACY command is write alike.
The XOR password has to be calculated with the password and two times the received
random number from the last GET RANDOM NUMBER command:
XOR_Password[31:0] = Password[31:0] XOR {Random_Number[15:0],
Random_Number[15:0]}.
The Privacy identifier is 04h.


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