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MB89R112 датащи(PDF) 25 Page - RAMXEED LIMITED |
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MB89R112 датащи(HTML) 25 Page - RAMXEED LIMITED |
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25 / 49 page ![]() MB89R112 DS411-00004-3v0-E 25 2-4. Read Multiple Blocks Command On receiving the Read Multiple Blocks command, the transponder reads the data stored in the specified successive blocks to the reader/writer. If the Option_flag (bit 7) is “1”, the transponder adds block security status information in the response. If the Option_flag (bit 7) is “0”, the transponder returns only the data in the specified blocks to the reader/writer. The value of the “number of blocks” field specified in the request is the expected number of blocks minus 1. Setting the number of blocks to “01H” makes a request to read 2 blocks. Setting the number of blocks to “00H” makes a request to read 1 block (the request having the same effect as the Read Single Block command). Request [Request from the reader/writer to the transponder] Response [Response from the transponder to the reader/writer] (1) When Error_flag set (2) When Error_flag not set SOF Flag Command (Read Multiple Blocks) UID (Addressed mode) First block number Number of blocks CRC EOF 8 bits 8 bits (“23H”) 64 bits 8 bits 8 bits 16 bits SOF Flag Error code CRC EOF 8 bits (“01H”) 8 bits 16 bits SOF Flag Block security status (option) Data CRC EOF 8 bits (“00H”) 8 bits 256 bits 16 bits Repeated as required |
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