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SRTAG2KL データシート(PDF) 13 Page - STMicroelectronics

部品番号 SRTAG2KL
部品情報  NFC Forum Type 4 Tag IC with 2-Kbit EEPROM
PDF  51 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

SRTAG2KL データシート(HTML) 13 Page - STMicroelectronics

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SRTAG2KL
SRTAG2KL memory management
3.1.4
System file layout
The system file specifies the configuration of the SRTAG2KL. Table 6 lists the different
fields.
3.2
Read and write access rights to the NDEF File
The NDEF file can be locked for read or write accesses. It is also protected by a 128-bit
password that the host shall present before accessing the NDEF file. There are two 128-bit
passwords, one for the read access and the other one for the write access.
Table 6. Field list
File offset
Field name
Number of
bytes
Read access Write access
Delivery
state
0x0000
Length system file
2
yes
-
0x0012
0x0002
ST Reserved
1
yes
none
0x80
0x0003
Event Counter
Config
1
yes
yes (1)
1. Configuration bytes can be locked by setting the Most significant bit to 1. Once locked, these bytes cannot
be changed anymore.
0x00
0x0004
20 bits counter (MS
nibble 0x0)
3
yes
none
0x000000
0x0007
Product version
1
yes
none
0x11(2)
2. ST reserved.
0x0008
UID
7
yes
none
0x02E2 xx xx
xx xx xx (3)
3.
x values are defined by ST to ensure UID unicity.
0x000F
Memory Size - 1
2
yes
none
0x00FF
0x0011
Product Code
1
yes
none
0xE2
Table 7. Details about the Counter config field
File offset
b7
b6-b2
b1
b0
0x0003
Counter config lock bit:
0b0: unlocked
0b1: locked
0b00000: ST reserved
Counter enable:
0b0: disable
0b1: enable
Counter increment:
0b0: on Read
0b1: on Write



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