XRA00SBN18I1GE STMicroelectronics, XRA00SBN18I1GE Datasheet - Page 13

• Manufacturer Part Number: XRA00SBN18I1GE
• Manufacturer: STMicroelectronics

Specifications of XRA00SBN18I1GE

• Lead Free Status / RoHS Status: Compliant

Output Data Transfer from the XRA00 to the
Reader
Answer Binary Data Bits 0 and 1. The
scattered answer from the XRA00 is modulated by
a selection of one out of two symbols per data bit
cell. The data bit cell period t
2 transitions for a binary data 0, and 4 transitions
for a binary data 1 as shown in
Figure 17. XRA00 Answer Binary Data Bit Cell Encoding
Answer Frame from the XRA00 to the Reader.
The XRA00 answers to Reader commands with a
backscatter modulation that follows the FSK bit
coding scheme as shown in
scheme define two symbols which are binary data
0 and binary data 1, respectively.
Figure 18. XRA00 Answer Preamble
READER
TAG
EOF
tagbitcell
Bin Pulse
Figure 17.
Figure 17.
is defined as
t tagbitcell = 1/2t 0
Answer Data 1
t tagscrollDel
back-
This
The
LSB MSB
11111110
Preamble
(8 bits)
nominal data rate for the XRA00 answer is syn-
chronized to twice the Request data rate (defined
in
Under this encoding scheme, there are always
transitions in the middle of a data bit and the se-
quence of 0’s and 1’s remains unchanged when
the code is inverted as shown in
After a Reader BIN pulse, the XRA00 waits for a
time that depends on the received command be-
ore starting to generate the answer. The XRA00
answer consists of an 8 bit Preamble followed by
the data bits read from the non-volatile memory.
The preamble has a fixed value of 11111110 and
is sent as shown in
sent lowest bit address first.
Answer Data 0
Table
t tagbitcell
4.).
CRC data
16 bits
Figure 18.
Tag ID Code
96 bits
The data bits are
Figure 19.
XRA00
ai10756
ai10757
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