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ST25DV64K 数据表(PDF) 111 Page - STMicroelectronics |
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ST25DV64K 数据表(HTML) 111 Page - STMicroelectronics |
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111 / 200 page  7.6.24 Get Multiple Block Security Status When receiving the Get Multiple Block Security Status command, the ST25DVxxx sends back its security status for each address block: 0 when block is writable else 1 when block is locked for writing. The blocks security status are defined by the area security status (and by LCK_CCFILE register for blocks 0 and 1). The blocks are numbered from 00h up to the maximum memory block number in the request, and the value is minus one (–1) in the field. For example, a value of “06” in the “Number of blocks” field requests will return the security status of seven blocks. This command does not respond an error if number of blocks overlap areas or overlap the end of the user memory. The number of blocks is coded on 1 Byte and only first 256 blocks of ST25DV16K-xx and ST25DV64K-xx can be addressed using this command. The Option_flag is not supported. The Inventory_flag must be set to 0. Table 173. Get Multiple Block Security Status request format Request SOF Request_flags Get Multiple Block Security Status UID (1) First block number Number of blocks CRC16 Request EOF - 8 bits 2Ch 64 bits 8 bits 8 bits 16 bits - 1. This field is optional. Request parameter: • Request flags • UID (optional) • First block number • Number of blocks Table 174. Get Multiple Block Security Status response format when Error_flag is NOT set Response SOF Response_flags Block security status CRC16 Response EOF - 8 bits 8 bits (1) 16 bits - 1. Repeated as needed. Response parameters: • Block security status Table 175. Block security status b7 b6 b5 b4 b3 b2 b1 b0 Reserved for future use All at 0 0: Current block not locked 1: Current block locked Table 176. Get Multiple Block Security Status response format when Error_flag is set Response SOF Response_flags Error code CRC16 Response EOF - 8 bits 8 bits 16 bits - Response parameter: • Error code as Error_flag is set: – 03h: the option is not supported – 0Fh: error with no information given – 10h: the specified block is not available ST25DV04K ST25DV16K ST25DV64K RF commands DS10925 - Rev 9 page 111/200 |
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