User's Manual

APPENDIX B: HF RFID STANDARDS AND TAG DESCRIPTIONS 39
I·Code1
The first long range 13.56MHz RFID IC that Philips released was the I·Code1 (SL1). Still in high volume
production, I·Code1 (SL1) is still widely used in applications globally and has an existing installed base of
millions of tags. The I·Code1 (SL1) uses a protocol and air interface that is proprietary to Philips.
By contrast, the I·Code SLI (SL2), released by Philips in 2002, is fully compatible with ISO/IEC 15693
parts -2 and -3. The host application developer should be explicitly aware of the distinction between the
I·Code1 (SL1) and the I·Code SLI (SL2).
Figure 7 - Memory Structure of the I·Code1 (version SL1 ICS30 01)
512 bits (64 bytes) of user memory is available for read/write.
Block #
32 bits
(4 bytes per block)
3 (0x03)
4 (0x04)
5 (0x05)
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
14 (0x0E)
15 (0x0F)
The user can permanently lock any
block.
Once a block is locked it cannot be
unlocked.
A 64-bit ID (factory programmed) uniquely identifies each I·Code1 chip.
TID Unique Tag ID 64 bits (8 bytes)