M24LR04E-RDW6T/2 STMicroelectronics, M24LR04E-RDW6T/2 Datasheet - Page 103

• 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
26.15
When configured in the RF busy mode, the RF WIP/BUSY pin is tied to 0 from the SOF that
starts the Write-sector Password command to the end of the M24LR04E-R response.
When configured in the RF write in progress mode, the RF WIP/BUSY pin is tied to 0 for the
duration of the internal write cycle (from the end of a valid Write sector password command
to the beginning of the M24LR04E-R response).
Lock-sector
On receiving the Lock-sector command, the M24LR04E-R sets the access rights and
permanently locks the selected sector. The Option_flag is supported.
A sector is selected by giving the address of one of its blocks in the Lock-sector request
(Sector number field). For example, addresses 0 to 31 are used to select sector 0 and
addresses 32 to 63 are used to select sector 1. Care must be taken when issuing the Lock-
sector command as all the blocks belonging to the same sector are automatically locked by
a single command.
The Protocol_extension_flag should be set to 0 for the M24LR04E-R to operate correctly.
During the RF write cycle W
otherwise, the M24LR04E-R may not correctly lock the memory block. The W
to t
Table 79.
1. Gray means that the field is optional.
Request parameters:
Table 80.
Table 81.
Request
Response
SOF
1nom
SOF
b
Request flags
(optional) UID
Sector number
Sector security status (refer to
0
7
+ 18 × 302 µs.
Request
_flags
Lock-sector request format
Sector security status
Lock-sector response format when Error_flag is NOT set
8 bits
b
0
6
Response_flags
8 bits
sector
Lock-
B2h
b
0
t
, there should be no modulation (neither 100% nor 10%),
5
Doc ID 022208 Rev 5
code
Mfg
02h
Table
IC
password control bits
b
4
80)
64 bits
UID
(1)
b
3
number
Sector
8 bits
CRC16
16 bits
Read / Write protection
b
2
security
Sector
status
8 bits
bits
CRC16
b
Command codes
16 bits
1
t
time is equal
Response
Request
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EOF
b
1
0