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ST25DV04K Datasheet(PDF) 45 Page - STMicroelectronics

No. de pieza ST25DV04K
Descripción Electrónicos  Dynamic NFC/RFID tag IC with 4-, 16-, or 64-Kbit EEPROM, and fast transfer mode capability
PDF  197 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST25DV04K Datasheet(HTML) 45 Page - STMicroelectronics

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5.5
Interface arbitration
The device automatically arbitrates the exclusive usage of RF and I2C interfaces. Arbitration scheme obeys to
“first talk first served” principle (see Figure 21).
Figure 21. Arbitration between RF and I2C
Power OFF
Boot
RF mute
I2C mute
RF busy
(I2C commamds
are NoAck)
ST25DV standby
RF free
I2C free
I2C busy
(0Fh or no
response to RF
requests)
VCC ON
or
RF field ON
Boot done
I2C start
I2C transition terminated
RF request SOF
RF transaction terminated
RF transaction is terminated:
•
at response EOF if answered
•
at request EOF is not answered
•
at RF field OFF.
I2C transaction is terminated:
•
at the end of EEPROM programming time after the stop condition of a successful write into EEPROM (user
memory or system configuration). See Section 6.4 I2C write operations for write time calculation
•
at stop condition for any other I2C transaction
•
at VCC power off
•
at any I2C error (terminated before stop condition)
•
at I2C timeout if it occurs
When RF is busy, I2C interface answers by NoAck on any I2C command.
When I2C is busy, RF commands receive no response (Inventory, Stay quiet, addressed commands) or error code
0Fh for any other command.
ST25DV04K ST25DV16K ST25DV64K
Interface arbitration
DS10925 - Rev 11
page 45/197



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