scg#
Overview#
The SCG example shows how to use SCG driver:
How to setup the SCG clock source.
How to use SCG clock while power mode switch.
How to use SCG APIs to get clock frequency.
This example prints the clock frequency through the terminal using the SDK driver.
Supported Boards#
FRDM-K32L2A4S
Hardware requirements
Mini USB cable
FRDM-K32L2A4S board
Personal Computer
Board settings
This demo prints through the OpenSDA serial port, don’t need special board setting.
Prepare the Demo
Connect a mini USB cable between the PC host and the OpenSDA USB port (J13) on frdmk32l2a4s board.
Open a serial terminal on PC for OpenSDA serial device with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo. For detailed instructions, see Getting Started with Software Development Kit for K32L2A (document SDKK32L2AGSUG).
Running the demo
When the demo runs successfully, will get the following messages on the OpenSDA terminal.
SCG Example Start
SCG clock source frequency
SIRC clock: 8000000 Hz
FIRC clock: 48000000 Hz
SPLL clock: 72000000 Hz
Current power mode: VLPR
Core clock: 4000000 Hz
Slow clock: 1000000 Hz
Current system clock: RUN
Core clock: 48000000 Hz
Slow clock: 24000000 Hz
Current power mode: HSRUN
Core clock: 72000000 Hz
Slow clock: 24000000 Hz
Current power mode: RUN
Core clock: 8000000 Hz
Slow clock: 4000000 Hz
SCG Example End.
FRDM-KE15Z
Hardware requirements
Micro USB cable
FRDM-KE15Z board
Personal Computer
Board settings
No special settings are required.
Prepare the Demo
Connect a USB cable between the host PC and the OpenSDA USB port on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the example runs successfully, the following message is displayed in the terminal:
SCG Example Start
SCG clock source frequency
SIRC clock: 8000000 Hz
FIRC clock: 48000000 Hz
LPFLL clock: 48000000 Hz
Current power mode: VLPR
Core clock: 4000000 Hz
Slow clock: 1000000 Hz
Current system clock: RUN
Core clock: 48000000 Hz
Slow clock: 24000000 Hz
Current power mode: RUN
Core clock: 8000000 Hz
Slow clock: 4000000 Hz
SCG Example End.
FRDM-KE16Z
Hardware requirements
Micro USB cable
FRDM-KE16Z board
Personal Computer
Board settings
No special settings are required.
Prepare the Demo
Connect a USB cable between the host PC and the OpenSDA USB port on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the example runs successfully, the following message is displayed in the terminal:
SCG Example Start
SCG clock source frequency
SIRC clock: 8000000 Hz
FIRC clock: 48000000 Hz
LPFLL clock: 48000000 Hz
Current power mode: VLPR
Core clock: 4000000 Hz
Slow clock: 1000000 Hz
Current system clock: RUN
Core clock: 48000000 Hz
Slow clock: 24000000 Hz
Current power mode: RUN
Core clock: 8000000 Hz
Slow clock: 4000000 Hz
SCG Example End.
FRDM-KE17Z
Hardware requirements
Micro USB cable
FRDM-KE17Z board
Personal Computer
Board settings
No special settings are required.
Prepare the Demo
Connect a USB cable between the host PC and the OpenSDA USB port on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the example runs successfully, the following message is displayed in the terminal:
SCG Example Start
SCG clock source frequency
SIRC clock: 8000000 Hz
FIRC clock: 48000000 Hz
LPFLL clock: 48000000 Hz
Current power mode: VLPR
Core clock: 4000000 Hz
Slow clock: 1000000 Hz
Current system clock: RUN
Core clock: 48000000 Hz
Slow clock: 24000000 Hz
Current power mode: RUN
Core clock: 8000000 Hz
Slow clock: 4000000 Hz
SCG Example End.
FRDM-KE17Z512
Hardware requirements
Micro USB cable
FRDM-KE17Z512 board
Personal Computer
Board settings
No special settings are required.
Prepare the Demo
Connect a USB cable between the host PC and the MCU-LINK USB port on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the example runs successfully, the following message is displayed in the terminal:
SCG Example Start
SCG clock source frequency
SIRC clock: 8000000 Hz
FIRC clock: 48000000 Hz
LPFLL clock: 48000000 Hz
Current power mode: VLPR
Core clock: 4000000 Hz
Slow clock: 1000000 Hz
Current system clock: RUN
Core clock: 48000000 Hz
Slow clock: 24000000 Hz
Current power mode: RUN
Core clock: 8000000 Hz
Slow clock: 4000000 Hz
SCG Example End.
FRDM-MCXE247
Hardware requirements
USB-C cable
FRDM-MCXE247 board
Personal Computer
Board settings
No special settings are required.
Prepare the Demo
Connect a USB cable between the host PC and the MCU-LINK USB port on the target board.
Open a serial terminal with the following settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the example runs successfully, the following message is displayed in the terminal:
SCG Example Start
SCG clock source frequency
SIRC clock: 8000000 Hz
FIRC clock: 48000000 Hz
SPLL clock: 72000000 Hz
Current power mode: VLPR
Core clock: 4000000 Hz
Slow clock: 1000000 Hz
Bus clock: 4000000 Hz
Current system clock: RUN
Core clock: 48000000 Hz
Slow clock: 24000000 Hz
Bus clock: 48000000 Hz
Current power mode: HSRUN
Core clock: 72000000 Hz
Slow clock: 24000000 Hz
Bus clock: 72000000 Hz
Current power mode: RUN
Core clock: 8000000 Hz
Slow clock: 4000000 Hz
Bus clock: 8000000 Hz
SCG Example End.