FS26 datasheet(120/156 Pages) NXP

120 / 156 page

NXP Semiconductors

FS26

Safety system basis chip with low power for ASIL D/ASIL B

aaa-045479

LS OFF

HS OFF

VDDIO = LDOx

VPRE

GPIOx

out

(Slot 2)

GPIOxPU_OTP

GPIOxPD_OTP

LS OFF

HS OFF

STANDBY

LPOFF

OTP

SLOT1

SLOT2

SLOT1

WAKE UP

EVENT

SLOT2

LP REQ

enabled

LS OFF

HS ON

OUTPUT

Hi-Z

LDOx LP configuration

LS ON

HS OFF

LS ON

HS OFF

LS OFF

HS ON

LS ON

HS OFF

Internal pull-up disabled

Internal pull-down disabled

Figure 42. GPIO Push-pull Active High operation. GPIOx_MODE_OTP = 0

19.3.2.3 GPIO active low mode

The active low mode is available only when the GPIOx is configured as a low-side driver.

When GPIOx is set as Active Low, as soon as the OTP is loaded, the pin is set to Hi-Z or High, depending on

the GPIOxPU_OTP bit. If the GPIOx is assigned to a slot in the power-up sequence, the pin remains High or Hi-

Z until it reaches the selected slot. Once the selected slot is reached, the GPIOx low-side driver is asserted low.

In normal mode, the internal pull-down resistor is disabled regardless of the GPIOxPD_OTP bit when the GPIOx

is set as low-side driver. If the internal pull-down is enabled by OTP, the resistor remains enabled in Low-power

modes, except in standby mode, to avoid floating nodes.

Default state

after OTP loaded

Normal mode

Standby mode

GPIOxLP_ON = 0

LPOFF mode /

Deep Fail Safe

GPIOxLP_ON = 0

Configuration

GPIOx

PU_OTP

GPIOx

PD_OTP

PIN HS

LS PIN HS

Hi-Z OFF OFF Low OFF ON Hi-Z OFF OFF Hi-Z OFF OFF

High OFF OFF Low OFF ON High OFF OFF Hi-Z OFF OFF

Hi-Z OFF OFF Low OFF ON Hi-Z OFF OFF Low OFF OFF

Low-side

driver

High OFF OFF Low OFF ON High OFF OFF Low OFF OFF

Table 119. GPIO Active Low mode behavior summary

FS26_SDS

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

Product short data sheet

Rev. 6.0 — 12 December 2025

Document feedback

120 / 156

FS26 Datenblatt(PDF) 120 Page - NXP Semiconductors

FS26 Datenblatt(HTML) 120 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datenblatt Download

Link URL