ST25DV64K datasheet(57/220 Pages) STMICROELECTRONICS

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ST25DV04K ST25DV16K ST25DV64K

ST25DVxxx specific features

219

•

Cumulates all events which generate interruptions. It should be checked by I2C host to

know which event triggered an interrupt on GPO pin.

•

When enabled, RF events are reported in IT_STS_Dyn register even if GPO output is

disabled though the GPO_EN bit.

•

Once read the ITSTS_Dyn register is cleared (set to 00h).

•

At power up, IT_STS_Dyn content is cleared (set to 00h).

•

IT_STS_Dyn is a volatile register. Value is maintained only if at least one of the two

power sources is present (RF field or VCC).

5.2.4

Configuring GPO

GPO and interruption pulse duration can be configured by RF user or by I2C host. One or

more interrupts can be enabled at same time.

RF user can use Read Configuration and Write Configuration commands to set accordingly

the GPO and IT_TIME registers, after presenting a valid RF configuration password to open

RF configuration security session.

Table 21. IT_STS_Dyn(1)

Command

No access

Type

I2C

Address

E2 = 0, 2005h

Type

Bit

Name

Function

Factory

Value

RF_USER

0: Manage GPO reset GPO

1: Manage GPO set GPO

RF_ACTIVITY

0: No RF access

1: RF access

RF_INTERRUPT

0: No Manage GPO interrupt request

1: Manage GPO interrupt request

FIELD_FALLING

0: No RF field falling

1: RF Field falling

FIELD_RISING

0: No RF field rising

1: RF field rising

RF_PUT_MSG

0: No message put by RF in FTM mailbox

1: Message put by RF in FTM mailbox

RF_GET_MSG

0: No message read by RF from FTM mailbox

1: Message read by RF from FTM mailbox, and end of message has been

reached.

RF_WRITE

0: No write in EEPROM

1: Write in EEPROM

1. Refer to Table 9: Dynamic registers memory map for the IT_STS_Dyn register.

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