MPF0900AMMA2ES datasheet(161/205 Pages) NXP

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NXP Semiconductors

PF09

Nine-channel power management IC with advanced system safety monitoring

3. Device goes through a Power-up sequence due to a Turn-off event or a hard reset: When the PF09

goes through a turn-off cycle due to a power off or hard reset, the turn-off FCCU interface will be reset to the

default XRESET operation (FCC0 ignored, FCCU1 = XRESET input) and the MCU must request the transition

to full bistable mode via the SYS_CMD[7:0] bits once it has performed its corresponding booting sequence.

14.7.3 Single-ended FCCU-level monitoring

When the FCCUx is set in level monitoring mode (OTP_FCCUx_MODE[1:0] = 01), each FCCUx input pin can

be used to monitor an independent single-ended error signal.

The FCCUx_POL bit is used to set the polarity to detect a fault condition on each pin independently.

FCCUx_POL

Fault polarity detection

Fault when FCCUx = low

Fault when FCCUx = high

Table 211. FCCUx fault detection in single-ended mode

In single-ended level monitoring, the selection of the pullup or pulldown resistor is done based on the pin

polarity, to allow a fault detection upon a pin disconnection.

FCCUx_RPULL_EN

FCCUx_POL

Internal pull resistor

FCCUx tri-stated

FCCUx pulldown

FCCUx pullup

Table 212. Pull resistor selection in single-ended level monitoring

14.7.4 Single-ended FCCU PWM monitoring

When the FCCUx is set in PWM monitoring mode (OTP_FCCUx_MODE[1:0] = 10), each FCCUx pin can be

used to monitor an independent single-ended PWM error signal.

aaa-056086

Reset phase

/self-test

FCCU0

EOUT[0]

Normal phase

Too fast

Too slow

Signal HIGH

Error phase

Signal LOW

Bad dutycycle

Input/high-Z

Output

Figure 45. FCCU single-ended PWM operation

In single-ended FCCU PWM error monitoring, the FCCUx input is used to monitor a square waveform error

signal. An FCCU fault condition is reported if the signal on the FCCUx pin observes any of the following

conditions:

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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