MPF0900AMBA2ES datasheet(76/205 Pages) NXP

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NXP Semiconductors

PF09

Nine-channel power management IC with advanced system safety monitoring

XRST_MODE

Reset type

hard reset

soft reset

Table 79. XRST_MODE

The OTP_XRST_MODE bit is provided to set the default value of the XRST_MODE at power-up.

The XRESET input is always monitored during the RUN state, and the system can select to allow monitoring of

the external reset signal in the STANDBY state via the XRST_STBY_EN bit.

XRST_STBY_EN

XRESET operation in STANDBY

Disabled

Enabled

Table 80. XRST_STBY_EN bit

The OTP_XRST_STBY_EN is used to set the default operation of the XRESET input in the STANDBY state.

12.8.9 GPIO1

The GPIO1 pin is a programable general-purpose IO with selectable open-drain or push-pull output buffer. The

GPIO1 pin is configurable as a general-purpose output (GPO) or a dedicated input to perform the VSELECT

operation via the OTP_GPIO1_MODE[1:0] bit.

OTP_GPIO1_MODE[1:0]

GPIO1 mode

Open-drain output

Push-pull output

Reserved

VSELECT input

Table 81. GPIO1 mode

The GPIO1_S flag is provided to read the real-time state of the GPIO1 pin.

GPIO1_S

GPIO1 State

Low

High

Table 82. GPIO1_S flag

12.8.9.1 GPO mode

When the GPIO1 is used as a general-purpose output (GPO mode), the pin will be asserted low during the OFF

states. It can be set high by default during the Power-up sequence, or manually during the system-on states.

When the output is set as an open drain, the GPIO1 pin can be pulled up to any voltage lower than VIN with an

external resistor between 10 kΩ to 470 kΩ.

System requirements must be taken into account when selecting the pullup voltage and resistance. To prevent

the output from being pulled high in the ULPOFF state, the selection must ensure that the pullup voltage is not

present during OFF condtions.

When the output is set as a push-pull driver, the PF09 will use the VIN internally to set the high state on the

GPIO1 pin.

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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