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ST25DV04KC bảng dữ liệu(PDF) 82 Page - STMicroelectronics

tên linh kiện ST25DV04KC
Giải thích chi tiết về linh kiện  Dynamic NFC/RFID tag IC with 4-Kbit, 16-Kbit or 64-Kbit EEPROM, fast transfer mode capability and optimized I2C
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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7.4.6
Response format
The response consists of:
•
an SOF
•
flags
•
parameters and data
•
a CRC
•
an EOF
Table 100. General response format
SOF
Response_flags
Parameters
Data
2 byte CRC
EOF
7.4.7
Response flags
In a response, the flags indicate how actions have been performed by the ST25DVxxKC and whether
corresponding fields are present or not. The response flags consist of eight bits.
Table 101. Definitions of response flags 1 to 8
Bit Nb
Flag
Level
Description
Bit 1
Error_flag
0
No error
1
Error detected. Error code is in the “Error” field.
Bit 2
ResponseBuffer
Validity_flag
0
Not supported, always set to 0
Bit 3
Final
response_flag
0
Not supported, always set to 0
Bit 4
Extension flag
0
Not supported, always set to 0
Bit 6-5
Block security
status length_flag
0
Not supported, always set to 0
Bit 7
Waiting time
extension
request_flag
0
Not supported, always set to 0
Bit 8
RFU
0
-
7.4.8
Response and error code
If the Error_flag is set by the ST25DVxxKC in the response, the Error code field is present and provides
information about the error that occurred.
Error codes not specified in Table 102 are reserved for future use.
ST25DV04KC ST25DV16KC ST25DV64KC
RF protocol description
DS13519 - Rev 3
page 82/203



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