M24LR04E-RDW6T/2 STMicroelectronics, M24LR04E-RDW6T/2 Datasheet - Page 67

• Manufacturer Part Number: M24LR04E-RDW6T/2
• Description: EEPROM 4-Kbit Dual EEPROM 1.8 to 5.5V 13.56Mhz
• Manufacturer: STMicroelectronics

Specifications of M24LR04E-RDW6T/2

• Product Category: EEPROM
• Memory Size: 4 Kbit
• Maximum Clock Frequency: 400 KHz
• Maximum Operating Current: 20 uA
• Operating Supply Voltage: 1.8 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TSSOP-8
• Factory Pack Quantity: 1

M24LR04E-R
18
18.1
18.2
18.3
Modes
The term “mode” refers to the mechanism used in a request to specify the set of
M24LR04E-Rs that answers the request.
Addressed mode
When the Address_flag is set to 1 (Addressed mode), the request contains the Unique ID
(UID) of the addressed M24LR04E-R.
Any M24LR04E-R that receives a request with the Address_flag set to 1 compares the
received Unique ID to its own. If it matches, then the M24LR04E-R executes the request (if
possible) and returns a response to the VCD as specified in the command description.
If the UID does not match, then it remains silent.
Non-addressed mode (general request)
When the Address_flag is cleared to 0 (Non-Addressed mode), the request does not contain
a Unique ID. Any M24LR04E-R receiving a request with the Address_flag cleared to 0
executes it and returns a response to the VCD as specified in the command description.
Select mode
When the Select_flag is set to 1 (Select mode), the request does not contain an M24LR04E-
R Unique ID. The M24LR04E-R in the Selected state that receives a request with the
Select_flag set to 1 executes it and returns a response to the VCD as specified in the
command description.
Only M24LR04E-Rs in the Selected state answer a request where the Select_flag set to 1.
The system design ensures in theory that only one M24LR04E-R can be in the Select state
at a time.
Doc ID 022208 Rev 5
Modes
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