M24LR16E-R Datasheet, PDF (118/143 Pages) STMicroelectronics – 16-bit EEPROM with password protection, dual interface & energy harvesting: 400 kHz I²C bus & ISO 15693 RF protocol at 13.56 MHz

Command codes
M24LR16E-R
Figure 75. WriteEHCfg frame exchange between VCD and M24LR16E-R
VCD
M24LR16E-
R
SOF
WriteEHCfg
request
EOF
<-t₁-> SOF
WriteEHCfg
response
EOF
WriteEHCfg sequence
when error
M24LR16E-
R
<------------------- W_t ---------------> SOF
WriteEHCfg
response
EOF
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 M24LR16E-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 M24LR16E-R response).
26.25
WriteDOCfg
On receiving the WriteDOCfg command, the M24LR16E-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 M24LR16E-R to
operate correctly. If the Protocol_extension_flag is at 1, the M24LR16E-R answers with an
error code.
The Option_flag is supported, the Inventory_flag is not supported.
During the RF write cycle W_t, there should be no modulation (neither 100% nor 10%),
otherwise, the M24LR16E-R may not program correctly the data into the Configuration byte.
The W_t time is equal to t_1nom + 18 × 302 µs.
Table 109. WriteDOCfg request format
Request
SOF
Request_
flags
WriteDOCfg
IC Mfg
code
UID⁽¹⁾
Data
CRC16
Request
EOF
8 bits
A4h
1. Gray means that the field is optional.
02h
64 bits 8 bits 16 bits
Request parameters:
● Request flag
● UID (optional)
● Data: during a WriteDOCfg command, bits 2 to 0 of the data are ignored (see
Table 14).
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Doc ID 018932 Rev 8