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ST25DV04KC Datasheet(PDF) 34 Page - STMicroelectronics

Part # ST25DV04KC
Description  Dynamic NFC/RFID tag IC with 4-Kbit, 16-Kbit or 64-Kbit EEPROM, fast transfer mode capability and optimized I2C
PDF  203 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST25DV04KC Datasheet(HTML) 34 Page - STMicroelectronics

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RF_USER:
•
GPO output level is controlled by Manage GPO command (set or reset)
•
When RF_USER is activated, GPO level is changed after EOF of ST25DVxxKC response to a Manage GPO
set or reset command (see Section 7.6.30 Manage GPO).
•
RF_USER is prevalent over all other GPO events when set by Manage GPO command (other interrupts are
still visible in IT_STS_Dyn status register, but do not change GPO output level).
Figure 17. RF_USER chronogram
2) VCD sends a ManageGPO command with value 01h (reset GPO) and ST25DVxxKC replies.
GPO/RF_USER is set high-Z low after ST25DVxxKC response.
S
O
F
E
O
F
4) VCD sends a ManageGPO command (any value) and ST25DVxxKC stays quiet (command not for
this VICC, or quiet state). GPO/RF_USER remains high-Z.
ManageGPO
command
GPO/RF_USER
GPO/RF_USER
S
O
F
ManageGPO
01h
command
E
O
F
1) VCD sends a ManageGPO command with value 00h (set GPO) and ST25DVxxKC replies.
GPO/RF_USER is tied low after ST25DVxxKC response.
t1
GPO/RF_USER
S
O
F
E
O
F
ST25DVxxKC
reply
S
O
F
ManageGPO
00h
command
E
O
F
3) VCD sends a ManageGPO command (any value) and ST25DVxxKC replies with error.
GPO/RF_USER remains high-Z.
GPO/RF_USER
S
O
F
ManageGPO
command
E
O
F
t1
S
O
F
E
O
F
ST25DVxxKC
reply
t1
S
O
F
E
O
F
ST25DVxxKC
reply
5) VCD sends any command other than ManageGPO command and ST25DVxxKC replies.
GPO/RF_USER remains high-Z.
GPO/RF_USER
S
O
F
Any other
command
E
O
F
t1/Wt
S
O
F
E
O
F
ST25DVxxKC
reply
ST25DV04KC ST25DV16KC ST25DV64KC
GPO
DS13519 - Rev 3
page 34/203



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