MPF0900AMBA2ES datasheet(41/205 Pages) NXP

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NXP Semiconductors

PF09

Nine-channel power management IC with advanced system safety monitoring

Selected functions whose SOFTRST_EN bits are set to 1 can reload the default OTP values during the soft

reset event.

The WD_SOFTRST_EN bit is provided to allow the WD_DURATION[3:0] bits to keep the current value or be

reset to the default OTP value during a soft reset event.

WD_SOFTRST_EN

WD duration on soft reset

No reset

Reset to default OTP

Table 36. WD duration on soft reset

When the GPIOx pins are configured as general purpose outputs, the GPOx_SOFTRST_EN bits are provided

to decide whether the respective GPO should keep the current values or reload the default configuration when a

soft reset is present.

GPOx_SOFTRST_EN

Soft reset impact

Output ignores the soft reset

Reset to default value

Table 37. Effect of soft reset on GPO

The default value for GPIO bits is evaluated based on the OTP_GPIOx_SEQ bits:

• If OTP_GPIOx_SEQ = 0x00, the output is defaulted to LOW.

• If OTP_GPIOx_SEQ != 0x00, the output is defaulted to HIGH.

The behavior of the system regulators (SWx/LDOx) upon a soft reset is controlled by the corresponding

SWx_SOFTRST_EN/LDOx_SOFTRST_EN bits.

SWx_SOFTRST_EN LDOx_SOFTRST_EN

Soft reset tmpact

Ignores the soft reset

Reload the default value

Table 38. Effect of soft reset on system regulators

System regulators that are set to react to a soft reset will react based on the default configuration set by the

OTP registers.

Regulators that were enabled in the Power-up sequence will remain enabled, but if the output voltage was

changed during the system operation, it will return to the default voltage level set by the OTP bits.

Regulators that were not enabled during the power-up sequence, but were turned on during the SYSTEM ON

states, will be disabled when the default value is reloaded.

The VMONx_SOFTRST_EN bit is provided to determine whether the external VMON input will maintain the

current configuration or return to the default configuration when a soft reset is present.

VMONx_SOFTRST_EN

Soft reset impact

Ignores the soft reset

Reload the default value

Table 39. Effect of soft reset on external VMON input

When the VMONx is programmed to reload the default value on a soft reset, the corresponding voltage

monitoring will be disabled if the block was not enabled by default during the power up sequence.

PF09

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 1.3 — 16 December 2025

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