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SR176-SBN18 Datasheet(PDF) 3 Page - STMicroelectronics |
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SR176-SBN18 Datasheet(HTML) 3 Page - STMicroelectronics |
3 / 5 page 3/5 SR176 MEMORY MAPPING The SR176 is organized as 16 blocks of 16 bits, as shown in Figure 3. 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 EE- PROM 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 by a group of 2 blocks. The GET_PROTECTION command gives the sta- tus of the protection of blocks 4 to 15. Figure 3. SR176 Memory Mapping Block Address MSb LSb b15 16-bit block b7 b0 b8 Description 0 1 2 3 UID0 UID1 UID2 UID3 64-bit UID ROM 4 5 6 7 8 9 10 11 12 13 14 15 User Area User Area User Area User Area User Area User Area User Area User Area User Area User Area User Area Lockable EEPROM Lockable EEPROM Lockable EEPROM Lockable EEPROM Lockable EEPROM Lockable EEPROM Chip_ID Reserved OTP LOCK_REG ai07699 |
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