SRTAG2KL View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'SRTAG2KL' PDF : 51 Pages View PDF
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.
Table 6. Field list
File offset
Field name
Number of
bytes
Read access Write access
Delivery
state
0x0000
Length system file
2
0x0002
ST Reserved
1
0x0003
Event Counter
Config
1
0x0004
20 bits counter (MS
nibble 0x0)
3
0x0007
Product version
1
0x0008
UID
7
0x000F
Memory Size - 1
2
0x0011
Product Code
1
yes
-
0x0012
yes
none
0x80
yes
yes (1)
0x00
yes
none
0x000000
yes
none
0x11(2)
yes
none
0x02E2 xx xx
xx xx xx (3)
yes
none
0x00FF
yes
none
0xE2
1. Configuration bytes can be locked by setting the Most significant bit to 1. Once locked, these bytes cannot
be changed anymore.
2. ST reserved.
3. x values are defined by ST to ensure UID unicity.
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
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.
DocID026583 Rev 2
13/51
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