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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SRTAG512L датащи(PDF) 11 Page - STMicroelectronics |
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SRTAG512L датащи(HTML) 11 Page - STMicroelectronics |
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11 / 51 page  DocID027439 Rev 2 11/51 SRTAG512L SRTAG512L memory management 3 SRTAG512L memory management 3.1 Memory structure The SRTAG512L supports the NDEF Tag Application as defined in the NFC Forum Type 4 Tag. The SRTAG512L is composed of three files: • One Capability Container file • One NDEF file • One System file: this file is an ST-proprietary file The System file contains some information on the configuration of the SRTAG512L device. The CC file gives some information about the SRTAG512L itself and the NDEF file. The NDEF file contains the User data. 3.1.1 File identifier The file identifier is the value used in the Select command to select a file. 3.1.2 CC file layout The CC file gives some information about the SRTAG512L and the NDEF file. This file is a read-only file for the RF host and cannot be modified by issuing a write command. The T field, Read Access and Write Access fields can be changed by the RF host by issuing a specific process (refer to Section 7: Functional procedures). Table 3. File identifier File identifier Meaning 0xE101 System file 0xE103 CC file 0x0001 NDEF file Table 4. CC file layout for 1 NDEF file File offset Meaning Value Comments 0x0000 Length CC file 0x000F 15 bytes 0x0002 Mapping version(1) 0x20 or 0x10 V 2.0 or V 1.0 0x0003 Maximum number of bytes that can be read 0x0040 64 bytes 0x0005 Maximum number of bytes that can be written 0x0036 54 bytes |
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