M24LR04E-RDW6T/2 STMicroelectronics, M24LR04E-RDW6T/2 Datasheet - Page 117

• 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
Figure 75. WriteEHCfg frame exchange between VCD and M24LR04E-R
26.25
M24LR04E-
M24LR04E-
VCD
R
R
When configured in the RF busy mode, the RF WIP/BUSY pin is tied to 0 from the SOF that
starts the WriteEHCfg 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
entire duration of the internal write cycle (from the end of a valid WriteEHCfg command to
the beginning of the M24LR04E-R response).
WriteDOCfg
On receiving the WriteDOCfg command, the M24LR04E-R writes the data contained in the
request to the Configuration byte and reports whether the write operation was successful in
the response. The Protocol_extension_flag should be set to 0 for the M24LR04E-R to
operate correctly. If the Protocol_extension_flag is at 1, the M24LR04E-R answers with an
error code.
The Option_flag is supported, the Inventory_flag is not supported.
During the RF write cycle W
otherwise, the M24LR04E-R may not program correctly the data into the Configuration byte.
The W
Table 108. WriteDOCfg request format
1. Gray means that the field is optional.
Request parameters:
Request
SOF
SOF
Request flag
UID (optional)
Data: during a WriteDOCfg command, bits 2 to 0 of the data are ignored (see
Table
t
time is equal to t
14).
WriteEHCfg
request
Request_
flags
8 bits
1nom
EOF
WriteDOCfg
t
, there should be no modulation (neither 100% nor 10%),
+ 18 × 302 µs.
Doc ID 022208 Rev 5
A4h
<------------------- W
<-t
1
-> SOF
IC Mfg
code
02h
WriteEHCfg
t
response
---------------> SOF
64 bits
UID
(1)
EOF
8 bits
Data
WriteEHCfg sequence
WriteEHCfg
response
CRC16
16 bits
Command codes
when error
Request
EOF
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EOF