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AN3985 датащи(PDF) 30 Page - STMicroelectronics

номер детали AN3985
подробное описание детали  Using the CR95HF library with STM8L microcontrollers
PDF  105 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3985 датащи(HTML) 30 Page - STMicroelectronics

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ISO/IEC 15693 layer
AN3985
30/105
Doc ID 022255 Rev 2
This structure is defined in ISO15693_structure.h.
typedef struct
{
u8 command_ok;
u8 error_code;
u8 response_flags;
u8 dataField[ISO15693_DATA_RECEIVED_MAX_SIZE];
u8 receivedDataLength;
u8 UID_Tag[ISO15693_UID_SIZE];
u8 AFI_Tag;
u8 DSFID_Tag;
u8 ICRef;
u8 memSize[ISO15693_MEMSIZE_MAX_WORD_BYTE_SIZE];
}ISO15693_Tag;
5.3
ISO/IEC 15693 command format
The commands defined by ISO/IEC 15693 specification have the following structure
:
With:
SOF: start of frame
Request flag: 1 byte
Command code: 1 byte
Data: 1 or more byte
CRC: 2 bytes
EOF: end of frame
5.3.1
SOF and EOF
The SOF and EOF are managed by CR95HF device.
5.3.2
Request flag management
The request flags byte is managed by the user application. Each bit or flag specifies the
actions to be carried out by the contactless tag and whether the corresponding fields are
present or not.
The request flags is a byte integrated on all ISO/IEC 15693 commands, which specifies the
actions to be performed by the contactless tag.
The meaning of bit 1, 2 and 4 is the same for all ISO/IEC 15693 commands.
Bit 3 (Inventory_flag) of the request flag defines the contents of the 4 MSBs (bits 5 to 8).
When bit 3 is reset (0), bits 5 to 8 contain the contactless tag selection criteria. When bit 3 is
set (1), bits 5 to 8 define the contactless tag Inventory parameters.
SOF
Request flag
Command code
Data
CRC
EOF



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