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NTP53X2 データシート(PDF) 26 Page - NXP Semiconductors

部品番号 NTP53X2
部品情報  NTAG 5 link - NFC Forum-compliant I2C bridge
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メーカー  NXP [NXP Semiconductors]
ホームページ  http://www.nxp.com
Logo NXP - NXP Semiconductors

NTP53X2 データシート(HTML) 26 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
26 / 133
Table 24. NFC Key Privileges (KPx) location
Block Address
NFC
I2C
Byte 0
Byte 1
Byte 2
Byte 3
11h
1011h
NFC_KP0
RFU
13h
1013h
NFC_KP1
RFU
15h
1015h
NFC_KP2
RFU
17h
1017h
NFC_KP3
RFU
Table 25 shows the definition of the Key Privileges bytes KPx. The bits define the
privileges for the related key used with mutual authentication. If the related bit is set to
1b, the access for the dependent area/feature is granted after mutual authentication with
the related key.
Table 25. Definition of NFC Key Privileges bytes KPx
Bit Privilege
Description
7
Restricted AREA_1 Write
Write access to restricted user memory AREA_1
6
Restricted AREA_1 Read
Read access to restricted user memory AREA_1
5
Crypto Config
Preset of Authentication Limit
4
EAS/AFI
Access for write alike command for EAS and AFI as
following:
PROTECT EAS/AFI
SET EAS
RESET EAS
LOCK EAS
WRITE EAS ID
WRITE AFI
LOCK AFI
3
Destroy
Access to the DESTROY functionality
2
Privacy
Enable/disable of the PRIVACY mode
1
Write
Write access to protected user memory area
0
Read
Read access to protected user memory area
8.1.3.9 Keys and passwords
The keys or passwords are stored in the configuration memory. The usage of the
individual keys depends on the related Key Privileges.
The state of the keys (including read and write access with the READ CONFIG and
WRITE CONFIG commands) depends on the status of the related Key Header and the
status of the Global Crypto Header.
From I2C perspective, these blocks can be written if not locked by the I2C section lock.
Table below shows the location of the 128-bit AES Table 26 keys in the configuration
memory.
NOTE: AES keys are only available for NTP5332 in AES mode.


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