STSPIN32G4 datasheet(30/48 Pages) STMICROELECTRONICS

30 / 48 page

The READY output can be programmed to report one or more of the following conditions:

•

The VCC supply is below the undervoltage threshold.

•

Thermal shutdown.

•

Entering standby mode.

By default, the pin reports the standby and the VCC undervoltage condition (refer to Table 19).

5.5.3

nFAULT output

The nFAULT open-drain output indicates a critical failure condition. The output can be configured to report one or

more of the following failures:

•

The device performed a RESET (this signaling cannot be masked)

•

VDS monitoring protection is triggered

•

Thermal shutdown

•

The VCC supply is below the undervoltage threshold

By default, the nFAULT pin reports all above failures (refer to Table 20).

5.5.4

I2C interface

The internal registers are available through a standard IIC (I2C) interface supporting 7-bit addressing and

communication speed up to 1 Mbit/s (Fast mode Plus).

The 7-bit address of the device is fixed and equal to 1000111.

Table 16. I2C address

Device address

R/W bit

5.5.5

Registers

The configuration of the device is set through a list of 8-bit registers. Refer to the following tables for details.

Table 17. Power manager configuration register

Bit #

Bit name

Default

Description

POWMNG

Address 0x01

Protected

REG3V3_DIS

3.3V linear regulator:

Enabled by default, 1 to disable

VCC_DIS

VCC buck regulator:

Enabled by default, 1 to disable

STBY_REG_EN

Standby linear regulator:

Disabled by default, 1 to enable

VCC_VAL

Set the output value for the VCC regulator:

•

00: VCC set to 8V (default)

•

01: VCC set to 10V

•

10: VCC set to 12V

•

11: VCC set to 15V

STSPIN32G4

Control logic

DS13630 - Rev 1

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