XRA00SBN18I1GE STMicroelectronics, XRA00SBN18I1GE Datasheet - Page 30

• Manufacturer Part Number: XRA00SBN18I1GE
• Manufacturer: STMicroelectronics

Specifications of XRA00SBN18I1GE

• Lead Free Status / RoHS Status: Compliant

XRA00
Figure 32. Example of a Quiet Request Frame Signaling
Talk
XRA00 devices that match the data sent by the
Reader return to the Awake state, where they will
respond to commands from the Reader.
XRA00 devices inactivated by the Quiet command
can be reactivated by the Talk command.
The Talk command follows the same rules as the
Quiet, PingID and ScrollID commands for the se-
lection of the XRA00 devices. An individual XRA00
or a group of XRA00 devices can be brought out of
the Asleep state, as required.
Example Talk Command. A Reader issues a
Talk command containing the following data:
[CMD] =
[PTR] =
[LEN] =
Table 12. Example of a Talk Operation
Figure 33. Example of aTalk Request Frame Signaling
30/40
XRA00 1 ID
XRA00 2 ID
XRA00 3 ID
XRA00 4 ID
Bit Number
Commands
Commands
Quiet, Talk
Quiet, Talk
00110010
00000111
00001001
Towards Highest
EOF
EOF
...010001000001011011101010
...100111100001001010010010
...101101010001011011110110
...101100000001011011110111
...321098765432109876543210
Address Bit
XRA00 ID Code/Bit Position
1
1
b
b
b
(Talk)
(0x07)
(0x09)
7t 0
7t 0
Lowest Address Bit
b
b
b
b
[VALUE] = 000101101
The XRA00 devices will attempt to check 9 bits of
their address data, starting from bit 7, against the
data specified in the [VALUE] field. The XRA00
devices with matching data revert from the Asleep
to the Awake state thus becoming responsive to all
subsequent Reader commands until a new Quiet
command is received.
The XRA00 devices do not return any response to
the Talk command.
In the example illustrated in
lined XRA00 memory bits are compared with the
[VALUE] data sent by the Reader.
After issuing the Talk command the Reader must
transmit seven 0’s after the EOF for the XRA00 to
execute the Talk Command. Once the seven 0’s
have been sent, the Reader must immediately is-
sue a transaction gap.
XRA00 executes the Talk command and enters the
Transaction Gap
Transaction Gap
NO (bit 10 does not match)
Awake state
Transaction
Transaction
YES
YES
YES
Next
Next
b
-
Table
(0x2D)
12., the under-
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