ST25DV64K datasheet(55/220 Pages) STMICROELECTRONICS

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ST25DV04K ST25DV16K ST25DV64K

ST25DVxxx specific features

219

•

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 IT pulse duration equation: 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 19. IT_TIME(1)

Command

Read Configuration (cmd code A0h) @01h

Write Configuration (cmd code A1h) @01h

Type

R always, W if RF configuration security session is open and configuration

not locked

I2C

Address

E2=1, 0001h

Type

R always, W if I2C security session is open

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

1. Refer to Table 8: System configuration memory map for the IT_TIME register.

Table 20. GPO_CTRL_Dyn(1)

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

I2C

Address

E2 = 0, 2000h

Type

b0-b6: RO - b7 : R always, W always

Bit

Name

Function

Factory

Value

RF_USER_EN

0: disabled

1: GPO output level is controlled by Manage GPO Command (set/reset)

RF_ACTIVITY_EN

0: disabled

1: GPO output level changes from RF command SOF to response EOF.

RF_INTERRUPT_EN

0: disabled

1: GPO output level is controlled by Manage GPO Command (pulse).

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