Philips Semiconductors Product Specification Rev. 3.1 February 2005
Functional Specification Standard Label IC SL2 ICS20
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3.2.1 UNIQUE IDENTIFIER
The 64 bit unique identifier (UID) is programmed during the production process according to ISO/IEC 15693-
3 and cannot be changed afterwards.
The numbering of the 64 bits is done according to ISO/IEC 15693-3 starting with the LSB 1 and ending with
the MSB 64. This is in contrast to the general used bit numbering within a byte.
The TAG type is a part of the UID (bit41 to 48, after the manufacturer code which is “04” hex for Philips
Semiconductors).
The TAG type of the SL2 ICS20 is “01” hex.
MSB LSB
64 57 56 49 48 41 40 1
“E0” “04” “01” IC manufacturer serial number
UID 7 UID 6 UID 5 UID 4 UID 3 UID 2 UID 1 UID 0
3.2.2 EAS FUNCTION
The LSB of Byte 1 in Block –2 holds the EAS bit (Electronic Article Surveillance mode active à the label
responds to an EAS command)
Block –2, Byte 1
MSB LSB
X X X X X X X e
EAS
EAS: e = 1 à EAS enabled e = 0 à EAS disabled
Changing of the EAS Configuration must be done in secure environment. The label must not be
moved out of the communication field of the antenna during writing! We recommend to put the label
close to the antenna and not to remove it during operation.
