LRI64-A1S STMICROELECTRONICS [STMicroelectronics], LRI64-A1S Datasheet - Page 14

• 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]

LRI64
LRI64 STATES
A LRI64 can be in any one of three states:
–
–
–
Transitions between these states are as specified
in
Power-off State
The LRI64 is in the Power-off state when it re-
ceives insufficient energy from the VCD.
Ready State
The LRI64 is in the Ready state when it receives
enough energy from the VCD. It answers to any
Request
modes.
Quiet State
When in the Quiet State, the LRI64 answers to any
Request in Addressed mode.
Figure 20. LRI64 State Transition Diagram
14/38
Figure 20.
Power-off
Ready
Quiet
in
Addressed
Out of
field
and
Non-addressed
Out of
field
Power Off
Ready
Quiet
Stay quiet(UID)
In field
Write, Read, Get_System_Info
in addressed mode
Inventory (if UID written)
Write, Read, Get_System_Info
in addressed and
non-addressed modes
MODES
The term mode refers to the mechanism for spec-
ifying, in a Request, the set of LRI64 devices that
shall answer to the Request.
Addressed Mode
When the Address_flag is set to 1 (Addressed
mode), the Request contains the Unique ID (UID)
of the addressed LRI64 device (such as an LRI64
device). Any LRI64 receiving a Request in which
the Address_flag is set to 1, compares the re-
ceived Unique ID to its own UID. If it matches, it
execute the Request (if possible) and returns a
Response to the VCD, as specified by the com-
mand description. If it does not match, the LRI64
device remains silent.
Non-Addressed Mode (General Request)
When the Address_flag is set to 0 (Non-addressed
mode), the Request does not contain a Unique ID
field. Any LRI64 device receiving a Request in
which the Address_flag is set to 0, executes the
Request and returns a Response to the VCD as
specified by the command description.
AI09723