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ST25DV04K bảng dữ liệu(PDF) 28 Page - STMicroelectronics

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Giải thích chi tiết về linh kiện  Dynamic NFC/RFID tag IC with 4-, 16-, or 64-Kbit EEPROM, and fast transfer mode capability
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ST25DV04K bảng dữ liệu(HTML) 28 Page - STMicroelectronics

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RF_ACTIVITY:
•
GPO output level reflects the RF activity.
•
When RF_ACTIVITY is activated, a GPO output level change from RF command EOF to ST25DV
response EOF.
Figure 13. RF_ACTIVITY sequence
2) VCD sends a write command and ST25DV replies after write completed. GPO/RF_ACTIVITY is
released after ST25DV response.
S
O
F
E
O
F
5) VCD sends a command and ST25DV stays quiet (Stay Quiet command, command not for this
VICC, or quiet state). GPO/RF_ACTIVITY remains high-Z.
(m*)Wt
VCD
Command
GPO/RF_ACTIVITY (OD)
GPO/RF_ACTIVITY (OD)
S
O
F
E
O
F
ST25DV
reply
S
O
F
Write
command
E
O
F
1) VCD sends a command and ST25DV replies. GPO/RF_ACTIVITY is released after ST25DV
response.
t1
GPO/RF_ACTIVITY (OD)
S
O
F
E
O
F
ST25DV
reply
S
O
F
VCD
command
E
O
F
3) VCD sends a write command with option flag set to 1, and ST25DV replies after receiving EOF.
GPO/RF_ACTIVITY is released after ST25DV response.
>(m*)Wt
GPO/RF_ACTIVITY (OD)
S
O
F
E
O
F
ST25DV
reply
S
O
F
Write
command
E
O
F
E
O
F
t1
4) VCD sends an Inventory 16 slots command, and ST25DV replies in its slot. GPO/RF_ACTIVITY is
released after ST25DV response.
GPO/RF_ACTIVITY (OD)
S
O
F
E
O
F
ST25DV
reply
S
O
F
Inventory
command
E
O
F
E
O
F
t1
E
O
F
Slot 1
Slot n
ST25DV04K ST25DV16K ST25DV64K
GPO
DS10925 - Rev 11
page 28/197



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