MPC574xP
NXP Semiconductors
The MPC574xP is a Power Architecture®-based MCU for Automotive and Industrial Applications.
Application NoteNxp
Initializing the MPC574xP Clock Generation Module and Progressive Clock Switching Feature
Guide for configuring the MPC574xP MCU clock generation module and Progressive Clock Switching (PCS) to achieve 200 MHz while managing power supply voltage fluctuations.
Overview
This application note provides technical details for initializing the clock generation module and the Progressive Clock Switching (PCS) feature on the NXP MPC574xP Power Architecture-based MCU. It describes the specific PLL and clock divider settings required to achieve a 200 MHz core frequency starting from the 16 MHz internal RC oscillator. A significant portion of the document is dedicated to the PCS feature, which facilitates smooth ramp-up and ramp-down of system clocks to prevent undesired power supply fluctuations, such as Low Voltage Detect (LVD) or High Voltage Detect (HVD) triggers. The document includes clock tree diagrams, register configuration steps, frequency calculation formulas, and a C code implementation example.
Use Cases
- Configuring system and peripheral clocks for automotive and industrial applications
- Implementing smooth frequency transitions to minimize current spikes and voltage overshoot
- Initializing PLL0 and PLL1 for 160 MHz and 200 MHz operation
- Setting up clock dividers for CAN, FlexRay, and Ethernet peripherals
Topics
MPC574xP
Clock Generation Module
Progressive Clock Switching
PCS
PLL configuration
Power Architecture
MC_CGM
clock tree
automotive MCU
system clock
Referenced Parts
MPC5777M
NXP Semiconductors
DESCRIPTION: Provides functions to Initialize MPC5777M MCU
| MPC574xP | NXP Semiconductors | The MPC574xP is a Power Architecture®-based MCU for Automotive and Industrial Applications. |
| MPC5777M | NXP Semiconductors | DESCRIPTION: Provides functions to Initialize MPC5777M MCU |