LRI64-SBN18/1GE STMicroelectronics, LRI64-SBN18/1GE Datasheet - Page 19

• Manufacturer Part Number: LRI64-SBN18/1GE
• Description: IC EEPROM MEMORY TAG WAFER
• Manufacturer: STMicroelectronics
• Series: LRI64r

Specifications of LRI64-SBN18/1GE

• Rf Type: Write Once Read Many (WORM)
• Frequency: 13.56MHz
• Features: ISO15693, ISO18000-3
• Package / Case: Wafer
• For Use With: 497-5538 - DEMO KIT LONG-RANGE
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

LRI64
11
LRI64 protocol description
The Transmission protocol defines the mechanism to exchange instructions and data
between the VCD and the LRI64, in each direction. Based on “VCD talks first”, the LRI64
does not start transmitting unless it has received and properly decoded an instruction sent
by the VCD.
The protocol is based on an exchange of:
●
●
Each request and each response are contained in a frame. The frame delimiters (SOF,
EOF) are described in the previous paragraphs.
Each request
●
●
●
●
●
●
●
Each response
●
●
●
●
●
●
The number of bits transmitted in a frame is a multiple of eight, and thus always an integer
number of bytes.
Single-byte fields are transmitted least significant bit first.
Multiple-byte fields are transmitted least significant byte first, with each byte transmitted
least significant bit first.
The setting of the flags indicates the presence of any optional fields. When the flag is set, 1,
the field is present. When the flag is reset, 0, the field is absent.
Figure 16. VCD request frame format
a request from the VCD to the LRI64
a response from the LRI64 to the VCD
Request SOF
Request flags
Command code
Parameters (depending on the command)
Application data
2-byte CRC
Request EOF
Response SOF
Response flags
Parameters (depending on the command)
Application data
2-byte CRC
Response EOF
Request
SOF
(Figure
(Figure
(Figure
(Figure
(Figure
(Figure
(Table 3
(Figure
(Figure
Request
(Table
16) consists of:
Flags
17) consists of:
15)
15)
7)
8)
6)
to
11)
12)
Command
Table
Code
5)
Parameters
Data
2-Byte
CRC
LRI64 protocol description
Request
EOF
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