ST25DV04KC datasheet(44/203 Pages) STMICROELECTRONICS

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Table 31. GPO1

Bit

Name

Function

Factory value

GPO_EN

0: GPO output is disabled. GPO is High-Z (open drain version) or is tied to

ground (CMOS version).

1: GPO output is enabled. GPO outputs enabled interrupts.

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 EOF to response EOF.

RF_INTERRUPT_EN

0: disabled

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

FIELD_CHANGE_EN

0: disabled

1: A pulse is emitted on GPO, when RF field appears or disappears.

RF_PUT_MSG_EN

0: disabled

1: A pulse is emitted on GPO at completion of valid RF Write Message

command.

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.

RF_WRITE_EN

0: disabled

1: A pulse is emitted on GPO at completion of valid RF write operation in

EEPROM.

Note:

Refer to Table 13. System configuration memory map for the GPO1 register:

•

Enables the interruption source, and enable GPO output.

•

Several interruption sources can be enabled simultaneously.

•

The updated value is valid for the next command (except for the RF_WRITE interrupt, which is valid right

after EOF of the Write Configuration command if enabled through RF).

•

The GPO_EN bit (b0) is used to disable GPO output. The interruptions are still reported in STS_Dyn

•

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

must be open in order to write the GPO1 register.

Table 32. GPO2 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, E1=1, 0001h R always, W if I

2C security

session is open

ST25DV04KC ST25DV16KC ST25DV64KC

GPO

DS13519 - Rev 3

page 44/203

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