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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LRIS2K датащи(PDF) 76 Page - STMicroelectronics |
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LRIS2K датащи(HTML) 76 Page - STMicroelectronics |
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76 / 98 page  Write Password LRIS2K 76/98 Doc ID 13888 Rev 9 37 Write Password On receiving the Write Password command, the LRIS2K uses the data contained in the request to write the password and reports whether the operation was successful in the request. The Option_flag is supported. During the write cycle time, tW, there must be no modulation at all (neither 100% nor 10%). Otherwise, the LRIS2K may not correctly program the data into the memory. The tW time is equal to t1nom + 18 × 302 µs. After a successful write, the selected password must be locked again by issuing a Lock Password command to re-activate the block protection. Prior to writing the password for a block, the Write Password command erases the Protect Status area of the block. Request parameters: ● UID (optional) ● Password number (00h = Kill, 01h = Pswd1, 02h = Pswd2, 03h = Pswd3, other = Error) ● Data Response parameter: ● 32-bit password value. The response is sent back after the write cycle. Response parameter: ● Error code as Error_flag is set: – 10h: block address not available – 12h: block is locked – 13h: block not programmed Table 68. Write Password request format Request SOF Request _flags Write Password IC MFG code UID Password number Data CRC16 Request EOF 8 bits B1h 02h 64 bits 8 bits 32 bits 16 bits Table 69. Write Password response format when Error_flag is NOT set Response SOF Response_flags CRC16 Response EOF 8 bits 16 bits Table 70. Write Password response format when Error_flag is set Response SOF Response_ Flags Error code CRC16 Response EOF 8 bits 8 bits 16 bits |
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