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參數資料
| 型號： | LRI64 |
| 廠商： | 意法半導體 |
| 英文描述： | Memory TAG IC, 64-bit Unique ID with WORM User Area 13.56MHz, ISO 15693 Standard Compliant |
| 中文描述： | 內存標簽IC，64位唯一ID與WORM的用戶區(qū)13.56，ISO 15693標準兼容 |
| 文件頁數： | 18/38頁 |
| 文件大?。?/td> | 515K |
| 代理商： | LRI64 |
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LRI64
18/38
REQUEST PROCESSING BY THE LRI64
Upon reception of a valid Request, the LRI64 per-
forms the following algorithm, where:
–
NbS
is the total number of slots (1 or 16)
–
SN
is the current slot number (0 to 15)
–
The function
LSB(value,n)
returns the
n
least
significant bits of
value
–
The function
MSB(value,n)
returns the
n
most
significant bits of
value
–
“&” is the concatenation operator
–
Slot_Frame
is either a SOF or an EOF
SN = 0
if (Nb_slots_flag)
then
NbS = 1
SN_length = 0
endif
NbS = 16
SN_length = 4
endif
else
label1:
if LSB(UID, SN_length + Mask_length) =
LSB(SN,SN_length)&LSB(Mask,Mask_length)
then
answer to inventory request
endif
wait (Slot_Frame)
if Slot_Frame = SOF
then
Stop Anticollision
decode/process request
exit
endif
if Slot_Frame = EOF
if SN < NbS-1
thenSN = SN + 1
goto label1
exit
endif
endif
Explanation of the Possible Cases
Figure 21.
summarizes the main possible cases
that can occur during an anti-collision sequence
when the number of slots is 16.
The different steps are:
–
The VCD sends an Inventory Request, in a
frame, terminated by a EOF. The number of
slots is 16.
–
LRI64 #1 transmits its Response in Slot 0. It is
the only one to do so, therefore no collision
occurs and its UID is received and registered
by the VCD;
–
The VCD sends an EOF, to switch to the next
slot.
–
In slot 1, two LRI64 devices, #2 and #3,
transmit their Responses. This generates a
collision. The VCD records it, and remembers
that a collision was detected in Slot 1.
–
The VCD sends an EOF, to switch to the next
slot.
–
In Slot 2, no LRI64 transmits a Response.
Therefore the VCD does not detect a LRI64
SOF, and decides to switch to the next slot by
sending an EOF.
–
In slot 3, there is another collision caused by
Responses from LRI64 #4 and #5
–
The VCD then decides to send a Request (for
instance a Read Block) to LRI64 #1, whose
UID was already correctly received.
–
All LRI64 devices detect a SOF and exit the
anti-collision sequence. They process this
Request and since the Request is addressed
to LRI64 #1, only LRI64 #1 transmits its
Response.
–
All LRI64 devices are ready to receive another
Request. If it is an Inventory command, the
slot numbering sequence restarts from 0.
Note: the decision to interrupt the anti-collision se-
quence is up to the VCD. It could have continued
to send EOFs until Slot 15 and then send the Re-
quest to LRI64 #1.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LRI64_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Memory TAG IC at 13.56 MHz, with 64-bit Unique ID and WORM user area, ISO15693 and ISO18000-3 Mode 1 compliant |
| LRI64_08 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Memory tag IC at 13.56 MHz, with 64-bit unique ID and WORM user area, ISO 15693 and ISO 18000-3 Mode 1 compliant |
| LRI64-A1S | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Memory TAG IC, 64-bit Unique ID with WORM User Area 13.56MHz, ISO 15693 Standard Compliant |
| LRI64-A1S/1GE | 功能描述:電可擦除可編程只讀存儲器 TAG IC 13.56 MHz W/ 64-bit Unique ID RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數據保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| LRI64-A1S/XXX | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Memory TAG IC, 64-bit Unique ID with WORM User Area 13.56MHz, ISO15693 and ISO18000-3 Mode 1 Compliant |
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