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SRIX4K Datasheet(PDF) 18 Page - STMicroelectronics

No. de pieza SRIX4K
Descripción Electrónicos  13.56 MHz short-range contactless memory chip with 4096-bit EEPROM, anticollision and anti-clone functions
PDF  50 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

SRIX4K Datasheet(HTML) 18 Page - STMicroelectronics

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Memory mapping
SRIX4K
18/50
Figure 17.
EEPROM (addresses 7 to 127)
4.4
System area
This area is used to modify the settings of the SRIX4K. It contains 3 registers:
OTP_Lock_Reg, Fixed Chip_ID and ST Reserved. See Figure 18 for a map of this area.
A WRITE_BLOCK command in this area will not erase the previous contents. Selected bits
can thus be set from 1 to 0. All bits previously at 0 remain unchanged. Once all the 32 bits of
a block are at 0, the block is empty and cannot be updated any more.
Figure 18.
System area
Block
Address
MSb
b31
32-bit Block
b16 b15
b24 b23
b8 b7
LSb
b0
Description
Lockable
EEPROM
7
8
9
10
11
User Area
User Area
User Area
User Area
User Area
Ai07661B
13
14
15
16
...
User Area
User Area
User Area
User Area
User Area
12
127
User Area
User Area
EEPROM
Block
Address
255
MSb
b31
b24 b23
32-bit Block
b16 b15
b8 b7
b0
LSb
Description
OTP
OTP_Lock_Reg
ST Reserved
Fixed Chip_ID
(Option)
ai07663



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