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Add recommended 24MHz crystal setting

Later, we should check if we can reduce the bias, also (For me, it works with minimal bias -but I think should should keep it for now, as it is).
teensy4-core
Frank 4 年之前
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共有 1 個文件被更改,包括 1 次插入0 次删除
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      teensy4/startup.c

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teensy4/startup.c 查看文件

@@ -52,6 +52,7 @@ void ResetHandler(void)
IOMUXC_GPR_GPR14 = 0x00AA0000;
__asm__ volatile("mov sp, %0" : : "r" ((uint32_t)&_estack) : );
#endif
PMU_MISC0_SET = 1<<3; //Use bandgap-based bias currents for best performance (Page 1175)
// pin 13 - if startup crashes, use this to turn on the LED early for troubleshooting
//IOMUXC_SW_MUX_CTL_PAD_GPIO_B0_03 = 5;
//IOMUXC_SW_PAD_CTL_PAD_GPIO_B0_03 = IOMUXC_PAD_DSE(7);

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