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SRI2K Datasheet(PDF) 17 Page - STMicroelectronics

Part # SRI2K
Description  13.56 MHz short-range contactless memory chip with 2048-bit EEPROM and anticollision functions
PDF  45 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

SRI2K Datasheet(HTML) 17 Page - STMicroelectronics

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SRI2K
Memory mapping
Doc ID 15779 Rev 3
17/45
4.3
EEPROM area
The 57 blocks between addresses 7 and 63 are EEPROM blocks of 32 bits each (228 bytes
in total). (See Figure 17 for a map of the area.) These blocks can be accessed using the
Read_block and Write_block commands. The Write_block command for the EEPROM area
always includes an auto-erase cycle prior to the write cycle.
Blocks 7 to 15 can be write-protected. Write access is controlled by the 8 bits of the
OTP_Lock_Reg located at block address 255 (see “OTP_Lock_Reg” for details). Once
protected, these blocks (7 to 15) cannot be unprotected.
Figure 17.
EEPROM (addresses 7 to 63)
4.4
System area
This area is used to modify the settings of the SRI2K. 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.
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
Ai07662c
13
14
15
16
...
User area
User area
User area
User area
User area
12
127
User area
User area
EEPROM
Block
Address
MSb
b31
32-bit Block
b16 b15
b24 b23b8 b7
LSb
b0
Description
Lockable
EEPROM
7
8
9
10
11
User Area
User Area
User Area
User Area
User Area
Ai15578
13
14
15
16
...
User Area
User Area
User Area
User Area
User Area
12
63
User Area
User Area
EEPROM



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