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ST25DV04K Datasheet(PDF) 56 Page - STMicroelectronics

Part # ST25DV04K
Description  Dynamic NFC/RFID tag IC with 4-Kbit, 16-Kbit or 64-Kbit EEPROM,and fast transfer mode capability
PDF  220 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST25DV04K Datasheet(HTML) 56 Page - STMicroelectronics

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ST25DVxxx specific features
ST25DV04K ST25DV16K ST25DV64K
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DocID027603 Rev 4
•
Allows I2C host to dynamically enable or disable GPO output by writing in GPO_EN bit
(b7).
•
GPO_EN bit of GPO_CTRL_Dyn register is prevalent over GPO_EN bit of GPO
register.
•
At power up, and each time GPO register is updated, GPO_CTRL_Dyn content is
copied from GPO register.
•
GPO_CTRL_Dyn is a volatile register. Value is maintained only if at least one of the two
power sources is present (RF field or VCC).
•
GPO_CTRL_Dyn bit 7 (GPO_EN) can be written even if I2C security session is closed
(I2C password not presented) but is read only for RF user.
•
Modifying GPO_CTRL_Dyn, the bit 7 GPO_EN does not affect the value of GPO
register bit 7 GPO_EN
b3
FIELD_CHANGE_EN
0: disabled
1: A pulse is emitted on GPO, when RF field appears or disappears.
1b
b4
RF_PUT_MSG_EN
0: disabled
1: A pulse is emitted on GPO at completion of valid RF Write Message
command.
0b
b5
RF_GET_MSG_EN
0: disabled
1: A pulse is emitted on GPO at completion of valid RF Read Message
command if end of message has been reached.
0b
b6
RF_WRITE_EN
0: disabled
1: A pulse is emitted on GPO at completion of valid RF write operation in
EEPROM.
0b
b7
GPO_EN
0: GPO output is disabled. GPO is High-Z (open drain) or 0 (CMOS)
1: GPO output is enabled. GPO outputs enabled interrupts.
1b
1. Refer to Table 9: Dynamic registers memory map for the GPO_CTRL_Dyn register.
Table 20. GPO_CTRL_Dyn(1) (continued)
RF
Command
Read Dynamic Configuration (cmd code ADh) @00h
Write Dynamic Configuration (cmd code AEh) @00h
Fast Read Dynamic Configuration (cmd code CDh) @00h
Fast Write Dynamic Configuration (cmd code CEh) @00h
Type
RO
I2C
Address
E2 = 0, 2000h
Type
b0-b6: RO - b7 : R always, W always
Bit
Name
Function
Factory
Value



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