參數(shù)資料
型號: LRI512
廠商: 意法半導(dǎo)體
英文描述: Memory TAG IC 512 bit High Endurance EEPROM 13.56MHz, ISO 15693 Standard Compliant with E.A.S.
中文描述: 內(nèi)存標(biāo)簽集成電路的512位高耐力的EEPROM 13.56,ISO 15693標(biāo)準(zhǔn)符合標(biāo)準(zhǔn)的防盜
文件頁數(shù): 20/54頁
文件大小: 351K
代理商: LRI512
LRI512
20/54
REQUEST FORMAT
The Request consists of
– SOF
– Flags
– A Command Code
– Parameters and Data
– CRC
– EOF
Table 10. General Request Format
Request Flags
In a Request, the flags field specifies the actions to
be performed by the LRI512, and whether corre-
sponding fields are present or not.
It consists of eight bits.
The bit 3 (Inventory_flag) of the request flag de-
fines the content of the 4 MSBs (bits 5 to 8).
When bit 3 is reset (0), bits 5 to 8 define the
LRI512 selection criteria.
When bit 3 is set (1), bits 5 to 8 define the LRI512
Inventory parameters.
Table 11. Request Flags 1 to 4 Definition
Note: 1. Sub-carrier_flag refers to the LRI512-to-VCD communi-
cation.
2. Data_rate_flag refers to the LRI512-to-VCD communica-
tion
Table 12. Request Flags 5 to 8 when Bit 3 = 0
Note: if the Select_flag is set to 1, the Address_flag shall be set to
0 and the UID field shall not be present in the Request.
Table 13. Request Flags 5 to 8 when Bit 3 = 1
S
O
F
Request
Flags
Command
Code
Parameters
Data
CRC
E
O
F
Bit 1
Sub-carrier
flag
0
A single sub-carrier frequency
shall be used by the LRI512
1
Two sub-carriers shall be used
by the LRI512
Bit 2
Data_rate
flag
0
Low data rate is used
1
High data rate is used
Bit 3
Inventory
flag
0
Flags 5 to 8 meaning are
according to Table 12
1
Flags 5 to 8 meaning are
according to Table 13
Bit 4
Protocol
Extension
flag
0
No Protocol format extension
Bit 5
Select flag
0
Request shall be executed by
any LRI512 according to the
setting of Address_flag
1
Request shall be executed only
by LRI512 in Selected State
Bit 6
Address
flag
0
Request is not addressed. UID
field is not present. It shall be
executed by all LRI512.
1
Request is addressed. UID field
is present. It shall be executed
only by the LRI512 whose UID
matches the UID specified in
the Request.
Bit 7 Option flag
0
Bit 8
RFU
0
Bit 5
AFI flag
0
AFI field is not present
1
AFI field is present
Bit 6 Nb_slots flag
0
16 slots
1
1 slot
Bit 7
Option flag
0
Bit 8
RFU
0
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