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ST25TV02K 数据表(PDF) 26 Page - STMicroelectronics

部件名 ST25TV02K
功能描述  NFC Type 5 / RFID tag IC with up to 2-Kbit EEPROM, product identification and protection
PDF  90 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST25TV02K 数据表(HTML) 26 Page - STMicroelectronics

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Each request and each response are contained in a frame. The frames are delimited by a Start of Frame (SOF)
and End of Frame (EOF).
The protocol is bit-oriented. The number of bits transmitted in a frame is a multiple of eight (8), that is an integer
number of bytes.
A single-byte field is transmitted least significant bit (LSBit) first. A multiple-byte field is transmitted least
significant byte (LSByte) first and each byte is transmitted least significant bit (LSBit) first.
Figure 8. ST25TV02K/512 protocol timing
Request
frame
Request
frame
Response
frame
Response
frame
VCD
ST25TV02K/512
Timing
t1
t2
t1
t2
6.2.2
ST25TV02K/512 states referring to protocol
The ST25TV02K/512 can be in one of four states:
•
Power-off
•
Ready
•
Quiet
•
Selected
Transitions between these states are specified in Figure 9. state transition diagram and Table 31. response
depending on Request_flags.
Power-off state
The ST25TV02K/512 are in the power-off state when it does not receive enough energy from the VCD.
Ready state
The ST25TV02K/512 are in the Ready state when it receives enough energy from the VCD. When in the Ready
state, the ST25TV02K/512 answer any request where the Select_flag is not set.
Quiet state
When in the Quiet state, the ST25TV02K/512 answer any request with the Address_flag set, except for Inventory
requests.
Selected state
In the Selected state, the ST25TV02K/512 answer any request in all modes (see Section 6.2.3 Modes):
•
Request in Select mode with the Select_flag set
•
Request in Addressed mode if the UID matches
•
Request in Non-Addressed mode as it is the mode for general requests
ST25TV02K ST25TV512
RF protocol description
DS12074 - Rev 11
page 26/90



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