sri4k STMicroelectronics, sri4k Datasheet - Page 37

• Manufacturer Part Number: sri4k
• Description: 13.56 Mhz Short-range Contactless Memory Chip With 4096-bit Eeprom And Anticollision Functions
• Manufacturer: STMicroelectronics

SRI4K
8.10
Unique Identifier (UID)
Members of the SRI4K family are uniquely identified by a 64-bit Unique Identifier (UID). This
is used for addressing each SRI4K device uniquely after the anticollision loop. The UID
complies with ISO/IEC 15963 and ISO/IEC 7816-6. It is a read-only code, and comprises
(as summarized in
Figure 49. 64-bit unique identifier of the SRI4K
Figure 50. GET_UID frame exchange between Reader and SRI4K
Power-On state
After Power-On, the SRI4K is in the following state:
SRI4K
Reader
an 8-bit prefix, with the most significant bits set to D0h
an 8-bit IC Manufacturer code (ISO/IEC 7816-6/AM1) set to 02h (for
STMicroelectronics)
a 6-bit IC code set to 00 0111b = 7d for SRI4K
a 42-bit Unique Serial Number
–
–
–
–
It is in the low-power state.
It is in READY state.
It shows highest impedance with respect to the reader antenna field.
It will not respond to any command except INITIATE().
S
O
F
0Bh
CRC L CRC H
Figure
63
Most significant bits
D0h
49):
E
O
F
55
<-t 0 -><-t 1 ->
02h
47
7d
S
O
F
41
UID
0
UID
1
Unique Serial Number
UID
2
UID
Least significant bits
3
UID
4
UID
5
AI14081
UID
0
6
UID
SRI4K commands
7
CRC L CRC H
AI10892b
E
O
F
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