HTSMOH3201EV,118 NXP Semiconductors, HTSMOH3201EV,118 Datasheet - Page 35

• Manufacturer Part Number: HTSMOH3201EV,118
• Description: IC HITAG-S 32BIT MOA2
• Manufacturer: NXP Semiconductors
• Series: HITAG® Sr

Specifications of HTSMOH3201EV,118

• Rf Type: Read / Write
• Frequency: 125kHz
• Features: ISO11785, ISO14223
• Package / Case: Module
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-2213-2; 935272969118; HTSMOH3201EV-T

Philips Semiconductors
11.3
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).
This command consists of a 5 Bit number (k4 to k0) describing the physical Bit position k where the collision occurred
followed by (k - 1) Bits of the detected UID and a Bit (one or zero) at the collision position. An 8 Bit CRC (cyclic
redundancy check) of this sequence is also sent to the transponders.
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).
Table 19
During the AC SEQUENCE commands the HITAG S Transponder stays in Init State. Even those HITAG S
Transponders where the k received Bits of the UID do not match remain in Init State.
Transponder
RWD:
RESPONSE PROTOCOL MODE
HITAG S
AC SEQUENCE
MSB
k4
Fast Advanced
Advanced
Standard
k3
k2
k1
LSB
k0
1................k
k Bits of UID
SOF
‘111’
‘111’
‘1’
MSB
CRC 8
35
HTS IC H32/HTS IC H56/HTS IC H48
LSB
CODING
AC
AC
AC
EOF
Product Specification Revision 3.1 2006 July 18
t
wresp
SOF
N =
DATA RATE
PUBLIC INFORMATION
2 kBit/s
2 kBit/s
4 kBit/s
k+1.............................32
(32 – k) Bits of UID