SR176A5T1GE STMicroelectronics, SR176A5T1GE Datasheet - Page 12

• Manufacturer Part Number: SR176A5T1GE
• Manufacturer: STMicroelectronics

Specifications of SR176A5T1GE

• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Compliant

Memory mapping
4
4.1
12/35
Device identification
Memory mapping
The SR176 is organized as 16 blocks of 16 bits, as shown in
The first four blocks, from location 0 to 3, are used to store read-only data. They store the
64-bit UID. This value cannot be modified.
Blocks from locations 4 to 14 offer a 176-bit EEPROM user area in which the application can
store its data values. Block 15 contains the OTP LOCK_REG and the programmed Chip_ID.
The PROTECT_BLOCK command is used to lock write access to blocks 4 to 15 in groups of
two blocks.
The GET_PROTECTION command gives the status of the protection of blocks 4 to 15.
Figure 12. SR176 memory mapping
The SR176 has a 64-bit Unique Identifier (UID) which is written by STMicroelectronics
during the manufacturing process. The UID is unique for each tag and cannot be altered. It
is stored in a Read Only Memory area (ROM). In the SR176, the UID is stored in the first
four blocks of the memory in blocks 0 to 3.
Address
Block
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9
MSb
b15
OTP LOCK_REG
16-bit block
User Area
User Area
User Area
User Area
User Area
User Area
User Area
User Area
User Area
User Area
User Area
b8
UID0
UID1
UID2
UID3
b7
Reserved
Chip_ID
Figure
LSb
b0
12.
Lockable EEPROM
Lockable EEPROM
Lockable EEPROM
Lockable EEPROM
Lockable EEPROM
Lockable EEPROM
Description
64-bit UID
ROM
SR176
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