XRAG2_08 Datasheet, PDF (14/33 Pages) STMicroelectronics – 432-bit UHF, EPCglobal Class1 Generation2 and ISO 18000-6C, contactless memory chip with user memory

Reader-to-tag protocol
5
Reader-to-tag protocol
XRAG2
5.1
Reader-to-tag Power-Up and Power-Down
The reader power-up and power-down waveform, and timing requirements are specified in
the EPCglobal Class 1 generation 2 RFID UHF specification, revision 1.0.9.
5.2
Reader-to-tag RF modulation
A reader can communicate with the tag by modulating the RF carrier using DSB-ASK, SSB-
ASK or PR-ASK, as specified in EPCglobal Class 1 generation 2 RFID UHF specification,
revision 1.0.9.
Figure 6. Reader-to-tag RF envelop
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Table 5. RF envelop parameters⁽¹⁾
Parameter
Symbol
Min
Modulation depth
RF envelop ripple
RF envelop rise and fall time
1. Characterized only.
(A-B)/A
80
M_h=M_I
0
t_{r,10-90% and} t_{f, 90-10%}
0
Typical
90
Max Units
100
%
0.05(A-B) V/m
0.33 Tari µs
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