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SRTAG2K-D bảng dữ liệu(PDF) 13 Page - STMicroelectronics

tên linh kiện SRTAG2K-D
Giải thích chi tiết về linh kiện  NFC Forum Type 4 Tag IC with 2-Kbit EEPROM and RF Session digital output
PDF  51 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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SRTAG2K-D bảng dữ liệu(HTML) 13 Page - STMicroelectronics

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SRTAG2K-D
SRTAG2K-D memory management
3.1.4
System file layout
The system file specifies the configuration of the SRTAG2K-D. Table 6 lists the different
fields.
3.2
Read and write access rights to the memory
An 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.
An NDEF file can be permanently locked for read or write accesses. Thus, the host cannot
access the NDEF file.
Table 5. NDEF file layout
File offset
Byte 0
Byte 1
Byte 2
Byte 3
0x0000
NDEF message length
User data
User data
0x0004
User data
User data
User data
User data
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
0x00FF
...
...
...
User data
Table 6. Field list
File offset
Field name
Number of
bytes
Read access
Write access
Delivery
state (1)
1. The delivery state for all passwords = 0x00000000000000000000000000000000.
0x0000
Length system file
2
RF
-
0x0012
0x0002
ST reserved
1
RF
none
0x01
0x0003
ST reserved
1
RF
none
0x00
0x0004
RF Session field
1
RF
none
0x11
0x0005
ST reserved
1
RF
none
0x00
0x0006
ST reserved
1
RF
none
0x01
0x0007
NDEF File number
(RFU)
1
RF
none
0x00
0x0008
UID
7
RF
none
0x02D2 xx xx
xx xx xx (2)
2.
x values are defined by ST to insure UID unicity.
0x000F
Memory Size
2
RF
none
0x00FF
0x0011
Product Code
1
RF
none
0xD2



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