M24LR04E-RMC6T/2 STMicroelectronics, M24LR04E-RMC6T/2 Datasheet - Page 68

• Manufacturer Part Number: M24LR04E-RMC6T/2
• Description: EEPROM 4-Kbit EEProm 400kHz 13.56Mhz 1.8 to 5.5V
• Manufacturer: STMicroelectronics

Specifications of M24LR04E-RMC6T/2

• Rohs: yes

Request format
19
19.1
68/142
Request format
The request consists of:
Table 26.
Request flags
In a request, the “flags” field specifies the actions to be performed by the M24LR04E-R and
whether corresponding fields are present or not.
The flags field consists of eight bits. Bit 3 (Inventory_flag) of the request flag defines the
contents of the four MSBs (bits 5 to 8). When bit 3 is reset (0), bits 5 to 8 define the
M24LR04E-R selection criteria. When bit 3 is set (1), bits 5 to 8 define the M24LR04E-R
Inventory parameters.
Table 27.
1. Subcarrier_flag refers to the M24LR04E-R-to-VCD communication.
2. Data_rate_flag refers to the M24LR04E-R-to-VCD communication.
3. Protocol_extension_flag must always be set to 0.
S
O
Bit No
F
Bit 1
Bit 2
Bit 3
Bit 4
an SOF,
flags,
a command code,
parameters and data,
a CRC,
an EOF.
Request_flags
Subcarrier_flag
Data_rate_flag
Inventory_flag
Protocol_extension_flag
General request format
Definition of request flags 1 to 4
Flag
(2)
(1)
Command code
Doc ID 022208 Rev 5
(3)
Level
0
1
0
1
0
1
0
A single subcarrier frequency is used by the
M24LR04E-R
Two subcarrier are used by the M24LR04E-R
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
M24LR04E-R
Table 28
Table 29
CRC
O
E
F