ST25DV64K datasheet(54/220 Pages) STMICROELECTRONICS

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ST25DVxxx specific features

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DocID027603 Rev 4

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Enables the interruption source, and enable GPO output.

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Several interruption sources can be enabled simultaneously.

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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 (b7) allows to disable GPO output (High-Z for open drain version,

driven low for CMOS version). Interruptions are still reported in IT_STS_Dyn register.

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

(present I2C password) must be open in order to write the GPO register.

Table 18. GPO(1)

Command

Read Configuration (cmd code A0h) @00h

Write Configuration (cmd code A1h) @00h

Type

R always, W if RF configuration security session is open and configuration not

locked

I2C

Address

E2=1, 0000h

Type

R always, W if I2C security session is open

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 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.

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.

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

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