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Hi team,
Customer would like to use internal crystal (32MHz) in order to save GPIO. They have some concern about below items. Please help clarify. Thank you.
1. In Sysconfig, does "BUSCLK" mean "32MHz" ? Which one ("clock enable" or "clock disable") is the default setting ? How could customer enable it ?
2. While using "internal crystal", some timing will be affected by temperature. Is there any information about the error rate of UART (at 115200 bps) vs. different temperature ?
Hi Jerry,
1. It is recommended to configure clock by sysconfig clock tree. The BUSCLK for different peripheral is different: for PD0 peripherals it's ULPCLK, and for PD1 peripherals it's MCLK. These two clock are default 32MHz in active mode, and default enabled.
2. The accuracy of internal high speed oscillator in different temperature could be find in datasheet, and it could be used to evaluate the accuracy of UART baud rate.
Best Regards,
Pengfei
