htsich56 NXP Semiconductors, htsich56 Datasheet - Page 9

• Manufacturer Part Number: htsich56
• Description: Hitag S Transponder Ic
• Manufacturer: NXP Semiconductors

NXP Semiconductors
Table 5.
Table 6.
HTSICH56_48_SDS
Product short data sheet
COMPANY PUBLIC
RWD:
Transponder:
RWD:
Transponder:
UID REQUEST xx
AC SEQUENCE
MSB
MSB
k4
7.5.1 UID REQUEST xx
7.5.2 AC SEQUENCE
UID REQUEST xx
7.5 Command set
k3
If more than one HITAG S Transponder is in the field of the antenna a special designed
RWD detects the first collision at the Bit position N = k of the UID response. As a result the
RWD starts an Anticollision Sequence (AC SEQUENCE).
After transmitting this command, all HITAG S Transponders which first k Bits of the own
UID match with the k received UID Bits, answer with the SOF and the rest of their own
UID.
If a collision occurs again the described cycle has to be repeated until one valid UID of the
transponders in the field is determined.
The complete response of the HITAG S Transponder is transmitted in Anticollision Coding
(AC).
k3
LSB
k1
EOF
t
wresp
All information provided in this document is subject to legal disclaimers.
LSB 1...............k
k0
SOF
N=
Rev. 3.0 — 12 October 2011
k Bits of UID
MSB
1............8
LSByte
UID 0
210330
LSB MSB
MSB
9.....k.......16
CRC 8
UID 1
HTSICH56; HTSICH48
LSB
LSB MSB
EOF
t
wresp
17............24
UID 2
SOF
N=
LSB MSB
HITAG S transponder IC
(32-k) bits to UID
© NXP B.V. 2011. All rights reserved.
k+1............32
25............32
MSByte
UID 3
9 of 21
LSB