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LRIS2K 数据表(PDF) 83 Page - STMicroelectronics |
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LRIS2K 数据表(HTML) 83 Page - STMicroelectronics |
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83 / 102 page ![]() LRIS2K Fast Read Single Block 83/102 40 Fast Read Single Block On receiving the Fast Read Single Block command, the LRIS2K reads the requested block and sends back its 32-bit value in the request. The Option_flag is supported. The data rate of the response is multiplied by 2. Request parameters: ● Option_flag ● UID (optional) ● Block number Response parameters: ● Block Locking Status if Option_flag is set (see Table 81) ● 4 bytes of block data Response parameter: ● Error code as Error_flag is set: – 0Fh: other error – 10h: block address not available Table 79. Fast Read Single Block request format Request SOF Request_ flags Fast Read Single Block IC Mfg code UID Block number CRC16 Request EOF 8 bits C0h 02h 64 bits 8 bits 16 bits Table 80. Fast Read Single Block response format when Error_flag is NOT set Response SOF Response _flags Block Locking Status Data CRC16 Response EOF 8 bits 8 bits 32 bits 16 bits Table 81. Block Locking status b7 b6 b5 b4 b3 b2 b1 b0 Reserved for future used. All at 0 password control bits Read / Write protection bits 0: Current Block not locked 1: Current Block locked Table 82. Fast Read Single Block 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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