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ST25DV04K Datasheet(PDF) 112 Page - STMicroelectronics |
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ST25DV04K Datasheet(HTML) 112 Page - STMicroelectronics |
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112 / 200 page  Figure 53. Get Multiple Block Security Status frame exchange between VCD and ST25DVxxx SOF Get Multiple Block Security request status VCD ST25DVxxx EOF SOF Get Multiple Block Security response status EOF t1 7.6.25 Extended Get Multiple Block Security Status When receiving the Extended Get Multiple Block Security Status command, the ST25DVxxx sends back the security status for each address block: 0 when the block is writable else 1 when block is locked for writing. The block security statuses are defined by the area security status. 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 to 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 2 Bytes so all memory 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 177. Extended Get Multiple Block Security Status request format Request SOF Request_flags Extended Get Multiple Block Security Status UID (1) First block number Number of blocks CRC16 Request EOF - 8 bits 3Ch 64 bits 16 bits 16 bits 16 bits - 1. This field is optional. Request parameter: • Request flags • UID (optional) • First block number (from LSB byte to MSB byte) • Number of blocks (from LSB byte to MSB byte) Table 178. Extended Get Multiple Block Security Status response format when Error_flags 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 ST25DV04K ST25DV16K ST25DV64K RF commands DS10925 - Rev 9 page 112/200 |
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