M24LR64-RMN6/2 STMicroelectronics, M24LR64-RMN6/2 Datasheet - Page 58
M24LR64-RMN6/2
Manufacturer Part Number
M24LR64-RMN6/2
Description
EEPROM, 64K, DUAL INTERFACE, 8SOIC
Manufacturer
STMicroelectronics
Datasheet
1.M24LR64-RDW62.pdf
(128 pages)
Specifications of M24LR64-RMN6/2
Memory Size
64Kbit
Clock Frequency
400kHz
Access Time
900ns
Supply Voltage Range
1.8V To 5V
Memory Case Style
SOIC
No. Of Pins
8
Operating Temperature Range
-40°C To +85°C
Svhc
No SVHC
Memory Configuration
8192 X 8, 2048 X 32
Interface Type
I2C, Serial, 2-Wire
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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M24LR64-R protocol description
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M24LR64-R protocol description
The transmission protocol (or simply protocol) defines the mechanism used to exchange
instructions and data between the VCD and the M24LR64-R, in both directions. It is based
on the concept of “VCD talks first”.
This means that an M24LR64-R will 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
Each request consists of:
●
●
●
●
●
●
●
Each response consists of:
●
●
●
●
●
●
The protocol is bit-oriented. The number of bits transmitted in a frame is a multiple of eight
(8), that is an integer number of bytes.
A single-byte field is transmitted least significant bit (LSBit) first. A multiple-byte field is
transmitted least significant byte (LSByte) first, each byte is transmitted least significant bit
(LSBit) first.
The setting of the flags indicates the presence of the optional fields. When the flag is set (to
one), the field is present. When the flag is reset (to zero), the field is absent.
Table 20.
Table 21.
Request SOF Request_flags
Response
SOF
a request from the VCD to the M24LR64-R
a response from the M24LR64-R to the VCD
a request SOF (see
flags
a command code
parameters, depending on the command
application data
a 2-byte CRC
a request EOF (see
an answer SOF (see
flags
parameters, depending on the command
application data
a 2-byte CRC
an answer EOF (see
Response_flags
VCD request frame format
M24LR64-R Response frame format
Section 12: M24LR64-R to VCD
Figure 20
Figure
Figure 35
Figure 41
Doc ID 15170 Rev 11
Parameters
Command
22)
code
and
to
to
Figure
Figure
Figure
Parameters
40)
46)
21)
Data
frames.
Data
2-byte CRC
2-byte CRC
M24LR64-R
Response
Request
EOF
EOF
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