lri2k STMicroelectronics, lri2k Datasheet - Page 19

• Manufacturer Part Number: lri2k
• Description: 13.56 Mhz, 2048-bit Eeprom Tag Ic With 64-bit Uid And Kill Code, Iso 15693 And Iso 18000-3 Mode 1 Compliant
• Manufacturer: STMicroelectronics

LRI2K
4
4.1
4.2
4.3
Communications signal from LRI2K to VCD
The LRI2K has several modes defined for some parameters, owing to which it can operate
in different noise environments and meet different application requirements.
Load modulation
The LRI2K is capable of communication with the VCD via an inductive coupling area
whereby the carrier is loaded to generate a subcarrier with frequency f
generated by switching a load in the LRI2K.
The load-modulated amplitude received on the VCD antenna shall be at least 10 mV when
measured as described in the test methods defined in International Standard ISO 10373-7.
Subcarrier
The LRI2K supports the one-subcarrier and two-subcarrier response formats. These
formats are selected by the VCD using the first bit in the protocol header. When one
subcarrier is used, the frequency f
When two subcarriers are used, frequency f
484.28 kHz (f
continuous phase relationship between f
Data rates
The LRI2K can respond using the low or the high data rate format. The selection of the data
rate is made by the VCD using the second bit in the protocol header. It also supports the x2
mode available on all the Fast commands.
by the LRI2K using the different response format combinations.
Table 4.
High
Low
Data rate
Fast commands
Fast commands
commands
commands
Standard
Standard
Response data rate
C
/28). When using the two-subcarrier mode, the LRI2K generates a
13.24 kbits/s (f
6.62 kbits/s (f
26.48 kbits/s (f
52.97 kbits/s (f
S1
One subcarrier
of the subcarrier load modulation is 423.75 kHz (f
S1
Table 4
and f
S1
c
c
/2048)
Communications signal from LRI2K to VCD
c
c
/1024)
/512)
/256)
is 423.75 kHz (f
S2
.
shows the different data rates produced
C
/32), and frequency f
6.67 kbits/s (f
26.69 kbits/s (f
Two subcarriers
not applicable
not applicable
S
. The subcarrier is
c
/2032)
c
/508)
S2
C
/32).
19/89
is