lri2k STMicroelectronics, lri2k Datasheet - Page 45

• 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
19
19.1
19.2
19.3
Timing definition
t
Upon detection of the rising edge of the EOF received from the VCD, the LRI2K waits for a
time t
slot during an inventory process. Values of t
Figure 11 on page
t
t
more LRI2K responses have been received during an Inventory command. It starts from the
reception of the EOF from the LRI2Ks.
The EOF sent by the VCD may be either 10% or 100% modulated regardless of the
modulation index used for transmitting the VCD request to the LRI2K.
t
Table 37: LRI2K protocol
Values of t
t
the LRI2K
t
LRI2K response has been received.
The EOF sent by the VCD may be either 10% or 100% modulated regardless of the
modulation index used for transmitting the VCD request to the LRI2K.
From the time the VCD has generated the rising edge of an EOF:
Table 19.
1. The tolerance of specific timings is ± 32/f
2.
3. t
2
2
3
1
2
3
is also the time after which the VCD may send a new request to the LRI2K as described in
is the time after which the VCD may send an EOF to switch to the next slot when no
is the time after which the VCD may send an EOF to switch to the next slot when one or
: LRI2K response delay
: VCD new request delay
: VCD new request delay in the absence of a response from
t
t
t
t
command description.
High data rate or Low data rate.
1
2
3
1max
SOF
If this EOF is 100% modulated, the VCD waits a time at least equal to t
sending a new EOF.
If this EOF is 10% modulated, the VCD waits a time at least equal to the sum of t
the LRI2K nominal response time (which depends on the LRI2K data rate and
subcarrier modulation mode) before sending a new EOF.
1nom
is the time taken by the LRI2K to transmit an SOF to the VCD. t
does not apply for write alike requests. Timing conditions for write alike requests are defined in the
2
before transmitting its response to a VCD request or before switching to the next
Minimum (min) values
are given in
Timing values
t
1max
318.6 µs
309.2 µs
18.
(2)
+ t
SOF
Table
timing.
(3)
(1)
19.
C
.
Nominal (nom) values
1
are given in
320.9 µs
No t
No t
nom
nom
Table
SOF
depends on the current data rate:
19. The EOF is defined in
Maximum (max) values
Timing definition
323.3 µs
No t
No t
3min
max
max
before
3min
45/89
+