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ST25DV64K 数据表(PDF) 85 Page - STMicroelectronics |
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ST25DV64K 数据表(HTML) 85 Page - STMicroelectronics |
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85 / 200 page  The ST25DVxxx exits the Quiet state when: • it is reset (power off), • receiving a Select request. It then goes to the Selected state, • receiving a Reset to Ready request. It then goes to the Ready state. Table 104. Stay Quiet request format Request SOF Request flags Stay Quiet UID CRC16 Request EOF - 8 bits 02h 64 bits 16 bits - The Stay Quiet command must always be executed in Addressed mode (Select_flag is reset to 0 and Address_flag is set to 1). Figure 34. Stay Quiet frame exchange between VCD and ST25DVxxx SOF Stay Quiet request VCD ST25DVxxx EOF 7.6.6 Read Single Block On receiving the Read Single Block command, the ST25DVxxx reads the requested block and sends back its 32-bit value in the response. The Option_flag is supported, when set response include the Block Security Status. The Inventory_flag must be set to 0. Block number is coded on 1 Byte and only first 256 blocks of ST25DV16K-xx and ST25DV64K-xx can be addressed using this command. Table 105. Read Single Block request format Request SOF Request_flags Read Single Block UID (1) Block number CRC16 Request EOF - 8 bits 20h 64 bits 8 bits 16 bits - 1. This the field is optional. Request parameters: • Request flags • UID (optional) • Block number Table 106. Read Single Block response format when Error_flag is NOT set Response SOF Response_flags Block security status (1) Data CRC16 Response EOF - 8 bits 8 bits 32 bits 16 bits - 1. This field is optional. Response parameters: • Block security status if Option_flag is set (see Table 107. Block security status) • Four bytes of block data ST25DV04K ST25DV16K ST25DV64K RF commands DS10925 - Rev 9 page 85/200 |
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