Application NoteNxp

Migrating from MPC5643L to MPC5744P

Technical guide for migrating automotive safety designs from the NXP MPC5643L to the MPC5744P MCU, highlighting architectural, hardware, and software differences.

View application note

Overview

This application note provides a detailed comparison and migration path from the 90nm MPC5643L to the 55nm MPC5744P Power Architecture MCU. Both microcontrollers target ISO 26262 ASIL D functional safety standards for automotive applications like electric power steering and braking. The document outlines significant architectural changes, including the shift from standard lock-step to delayed lock-step mode, the removal of decoupled parallel mode (DPM), and the transition from Book E ISA to a VLE-only instruction set. It details hardware enhancements in the MPC5744P such as increased Flash (2.5 MB) and SRAM (384 KB), the introduction of end-to-end ECC (e2eECC), and the replacement of the Memory Management Unit (MMU) with a 24-region Core MPU. Software considerations for flash wait states, register widths, and peripheral configuration are also covered.

Use Cases

Upgrading automotive chassis and safety systems from legacy MPC5643L designs.
Porting embedded software to the MPC5744P 55nm platform.
Designing ISO 26262 ASIL D compliant electronic stability or power steering controls.
Evaluating architectural differences between C90 and C55 NXP automotive MCUs.

Topics

NXP

MPC5643L

MPC5744P

Power Architecture

ISO 26262

ASIL D

Migration

MCU

e200z4

VLE

Automotive Safety

e2eECC

Referenced Parts

MPC5643L

NXP

The MPC5643L 32-bit MCU built on Freescale’s Power Architecture® technology is the first MCU to achieve ISO 26262 ASIL D functional safety standard certification.

MPC5744P

NXP

The MPC5744P MCU is the 55 nm successor to the MPC5643L.

MPC5743L

NXP

The MPC5743L implements one CTU module to control ADC0 and ADC1, while the MPC5744P has two CTU modules: CTU_0 controls ADC0 and ADC1 and CTU_1 controls ADC2 and ADC3 modules.

MPC5643L	NXP	The MPC5643L 32-bit MCU built on Freescale’s Power Architecture® technology is the first MCU to achieve ISO 26262 ASIL D functional safety standard certification.
MPC5744P	NXP	The MPC5744P MCU is the 55 nm successor to the MPC5643L.
MPC5743L	NXP	The MPC5743L implements one CTU module to control ADC0 and ADC1, while the MPC5744P has two CTU modules: CTU_0 controls ADC0 and ADC1 and CTU_1 controls ADC2 and ADC3 modules.