LRI64-A1S STMICROELECTRONICS [STMicroelectronics], LRI64-A1S Datasheet - Page 19

• Manufacturer Part Number: LRI64-A1S
• Description: Memory TAG IC, 64-bit Unique ID with WORM User Area 13.56MHz, ISO15693 and ISO18000-3 Mode 1 Compliant
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

TIMING DEFINITIONS
Figure 22.
and t
fied in
imum and a typical value specified in
summarized in
Table 8. Timing Values
Note: 1.
LRI64 Response Delay, t
Upon detection of the rising edge of the EOF re-
ceived from the VCD, the LRI64 waits for a time
equal to
before starting to transmit its response to a VCD
request, or switching to the next slot when in an in-
ventory process.
t
t
t
1
2
3
t
2.
3. The tolerance of specific timings is ± 32/f
3
2
. All of them have a minimum value, speci-
(min) = 4192 / f
Table
t
(see notes
1
t
the VCD.
t
conditions for write alike requests are defined in the com-
mand description.
SOF
1
(max) + t
t
(max)
1
(typ) = 4352 / f
t
1
Min.
shows three specific delay times: t
(min)
is the duration for the LRI64 to transmit an SOF to
14.. The t
does not apply for write alike requests. Timing
Table 8.
SOF
1,2
)
C
1
t
parameter also has a max-
1
(typ) = 4352 / f
C
1
Typ.
—
—
Table
C
C
.
t
1
Max.
(max)
14., as
—
—
1
, t
2
VCD New Request Delay, t
t
EOF to switch to the next slot when one or more
LRI64 responses have been received during an in-
ventory command. It starts from the reception of
the EOF received from the LRI64 devices.
The EOF sent by the VCD is 10% modulated, in-
dependent of the modulation index used for trans-
mitting the VCD request to the LRI64.
t
new request to the LRI64 as described in
19.
VCD New Request Delay when there is No
LRI64 Response, t
t
EOF to switch to the next slot when no LRI64 re-
sponse has been received.
The EOF sent by the VCD is 10% modulated, in-
dependent of the modulation index used for trans-
mitting the VCD request to the LRI64.
From the time the VCD has generated the rising
edge of an EOF:
–
2
2
3
is also the time after which the VCD may send a
is the time after which the VCD may send an
is the time after which the VCD may send an
The VCD waits for a time at least equal to the
sum of t
an LRI64, which depends on the data rate and
subcarrier modulation mode, before sending a
subsequent EOF.
t
2
(min) = 4192 / f
3
(min) and the typical response time of
3
C
2
LRI64
Figure
19/38