ST25DV04K datasheet(37/200 Pages) STMICROELECTRONICS

Part #	ST25DV04K

Description	Dynamic NFC/RFID tag IC with 4-Kbit, 16-Kbit or 64-Kbit EEPROM, and fast transfer mode capability

PDF	200 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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Table 27. IT_TIME access

I2C

Command

Type

Address

Type

Read Configuration (cmd code A0h) @01h

Write Configuration (cmd code A1h) @01h

R always, W if RF configuration security

session is open and configuration not

locked

E2=1, 0001h

R always, W if I2C security

session is open

Table 28. IT_TIME

Bit

Name

Function

Factory Value

b2-b0

IT_TIME

Pulse duration = 301 us - IT_TIME x 37.65 us ± 2 us

011b

b7-b3

RFU

00000b

Note:

Refer to Table 11. System configuration memory map for the IT_TIME register.

•

Defines interrupt pulse duration on GPO pin for the flowing events: RF_INTERRUPT, FIELD_CHANGE,

RF_PUT_MSG, RF_GET_MSG and RF_WRITE.

•

See Eq. (1) for interrupt duration calculation.

•

RF configuration security session (present RF password 0) or I2C security session (present I2C password)

must be open in order to write IT_TIME register.

Table 29. GPO_CTRL_Dyn access

I2C

Command

Type

Address

Type

Read Dynamic Configuration (cmd code ADh) @00h

Fast Read Dynamic Configuration (cmd code CDh) @00h

E2 = 0, 2000h

b0-b6: RO

b7 : R always, W always

ST25DV04K ST25DV16K ST25DV64K

GPO

DS10925 - Rev 9

page 37/200

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