m24lr16e-r STMicroelectronics, m24lr16e-r Datasheet - Page 104

• Manufacturer Part Number: m24lr16e-r
• Description: 16 Kbit Eeprom With Password Protection, Dual Interface & Energy Harvesting 400 Khz I²c Bus & Iso 15693 Rf Protocol At 13.56 Mhz
• Manufacturer: STMicroelectronics

Command codes
26.15
104/143
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 M24LR16E-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 M24LR16E-R response).
Lock-sector
On receiving the Lock-sector command, the M24LR16E-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 1 for the M24LR16E-R to operate correctly. If
the Protocol_extension_flag is at 0, the M24LR16E-R answers with an error code.
During the RF write cycle W
otherwise, the M24LR16E-R may not correctly lock the memory block. The W
to t
Table 80.
1. Gray means that the field is optional.
Request parameters:
●
●
●
●
Table 81.
Table 82.
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 018932 Rev 7
code
Mfg
02h
Table
IC
password control bits
b
4
81)
64 bits
UID
(1)
b
3
number
Sector
16 bits
CRC16
16 bits
Read / Write protection
b
2
security
Sector
status
8 bits
bits
CRC16
b
16 bits
1
t
time is equal
M24LR16E
Response
Request
EOF
EOF
b
1
0