lri2k STMicroelectronics, lri2k Datasheet - Page 35

• Manufacturer Part Number: lri2k
• Description: 13.56 Mhz, 2048-bit Eeprom Tag Ic With 64-bit Uid And Kill Code, Iso 15693 And Iso 18000-3 Mode 1 Compliant
• Manufacturer: STMicroelectronics

LRI2K
13
13.1
Request format
The request consists of:
Table 10.
Request flags
In a request, the "flags" field specifies the actions to be performed by the LRI2K and
whether corresponding fields are present or not.
The flags field consists of eight bits.
The bit 3 (Inventory_flag) of the request flag defines the contents of the 4 MSBs (bits 5 to 8).
When bit 3 is reset (0), bits 5 to 8 define the LRI2K selection criteria.
When bit 3 is set (1), bits 5 to 8 define the LRI2K Inventory parameters.
Table 11.
1. Subcarrier_flag refers to the LRI2K-to-VCD communication.
2. Data_rate_flag refers to the LRI2K-to-VCD communication
Bit 1
Bit 2
Bit 3
Bit 4
Bit No
O
S
F
an SOF
flags
a command code
parameters and data
a CRC
an EOF
Subcarrier_flag
Data_rate_flag
Inventory flag
Protocol Extension flag
Request flags
General request format
Definitions of request flags 1 to 4
Flag
(2)
(1)
Command code
Level
0
1
0
1
0
1
0
A single subcarrier frequency is used by the LRI2K
Two subcarriers are used by the LRI2K
Low data rate is used
High data rate is used
The meaning of Flags 5 to 8 is described in
The meaning of Flags 5 to 8 is described in
No Protocol format extension
Parameters
Description
Data
Request format
Table 12
Table 13
CRC
35/89
O
E
F