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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SRI512 датащи(PDF) 15 Page - STMicroelectronics |
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SRI512 датащи(HTML) 15 Page - STMicroelectronics |
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15 / 47 page  SRI512 Memory mapping 15/47 4.1 Resettable OTP area This area contains five individual 32-bit Boolean words (see Figure 12 for a map of the area). A Write_block command will not erase the previous contents of the block as the write cycle is not preceded by an auto-erase cycle. This feature can be used to reset selected bits from 1 to 0. All bits previously at 0 remain unchanged. When the 32 bits of a block are all at 0, the block is empty, and cannot be updated any more. See Figure 13 and Figure 14 for examples of the result of the Write_block command in the resettable OTP area. Figure 12. Resettable OTP area (addresses 0 to 4) Figure 13. Write_block update in standard mode (binary format) The five 32-bit blocks making up the Resettable OTP area can be erased in one go by adding an auto-erase cycle to the Write_block command. An auto-erase cycle is added each time the SRI512 detects a Reload command. The Reload command is implemented through a specific update of the 32-bit binary counter located at block address 6 (see Section 4.2: 32-bit binary counters for details). Block Address MSb b31 32-bit Block b16 b15 b14 b8 b7 LSb b0 Description Resettable OTP Bit 0 1 2 3 4 32-bit Boolean Area 32-bit Boolean Area 32-bit Boolean Area 32-bit Boolean Area 32-bit Boolean Area ai12381 ai07658 1 ... 1 1 01011 11 1 0 11 1 ... 1 0 01011 00 1 1 11 1 ... 1 0 01011 00 1 0 11 Previous data stored in block Data to be written New data stored in block b31 b0 |
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