M24LR64-RMN6/2 STMicroelectronics, M24LR64-RMN6/2 Datasheet - Page 70

• Manufacturer Part Number: M24LR64-RMN6/2
• Description: EEPROM, 64K, DUAL INTERFACE, 8SOIC
• Manufacturer: STMicroelectronics

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

Explanation of the possible cases
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Note:
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Explanation of the possible cases
Figure 51
sequence when the slot number is 16.
The different steps are:
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The decision to interrupt the anticollision sequence is made by the VCD. It could have
continued to send EOFs until Slot 16 and only then sent the request to M24LR64-R_1.
The VCD sends an Inventory request, in a frame terminated by an EOF. The number of
slots is 16.
M24LR64-R_1 transmits its response in Slot 0. It is the only one to do so, therefore no
collision occurs and its UID is received and registered by the VCD;
The VCD sends an EOF in order to switch to the next slot.
In slot 1, two M24LR64-Rs, M24LR64-R_2 and M24LR64-R_3 transmit a response,
thus generating a collision. The VCD records the event and remembers that a collision
was detected in Slot 1.
The VCD sends an EOF in order to switch to the next slot.
In Slot 2, no M24LR64-R transmits a response. Therefore the VCD does not detect any
M24LR64-R SOF and decides to switch to the next slot by sending an EOF.
In slot 3, there is another collision caused by responses from M24LR64-R_4 and
M24LR64-R_5
The VCD then decides to send a request (for instance a Read Block) to M24LR64-R_1
whose UID has already been correctly received.
All M24LR64-Rs detect an SOF and exit the anticollision sequence. They process this
request and since the request is addressed to M24LR64-R_1, only M24LR64-R_1
transmits a response.
All M24LR64-Rs are ready to receive another request. If it is an Inventory command,
the slot numbering sequence restarts from 0.
summarizes the main possible cases that can occur during an anticollision
Doc ID 15170 Rev 11
M24LR64-R