MSPM0G3507: MSPM0G3507 : SYSOSC accuracy with FCL/ROSC

Yutaka Kawabata

Part Number: MSPM0G3507
Other Parts Discussed in Thread: SYSCONFIG

Hello,

In my customized board environment, UART framing errors rarely occur.
Therefore, I would like to check whether the ROSC settings are working properly.

Is there a way to check from register information?

SYSOSC is 4MHz.
Connect a 100kΩ (±0.1%) resistor to the external resistor and use ROSC.

The ClockTree settings in Sysconfig are as follows.
- Enable Frequency Correction Loop: Checked (Enabled)
- Enable Ext Reference Resistor (ROSC): Checked (Enabled)
- Disable SYSOSC: Not checked

CCS 12.5
Sysconfig version V1.18
mspm0_sdk_1_20_00_05

over 2 years ago

0 Eason Zhou over 2 years ago

TI__Mastermind 39855 points

Maybe you can change the resistor value from 100 to 99 and check whether the system clock output will be influenced.

0 Yutaka Kawabata over 2 years ago in reply to Eason Zhou

Prodigy 90 points

Understood. Exactly If executing that method is possible, it could be checked. However, since I can’t access the port, I would like to know if there’s a way to confirm ROSC function from register information easily.