Hello
I meet a issue: the reset signal could not reset MCU.
when I measued the pin reset, find that The voltage of the reset signal is 1V and the time is 500us,and the supply voltage of MCU is 5V.
But I see the datasheet the range of low voltage is 0-0.3VDD,so the I and hardware engineer all think the hardware design meet with the datasheet.
so what is the requirement of the reset signal of MCU s32k116? could you tell me the corrent answer?
已解决! 转到解答。
This issue has been solved, the pull-up resistance 22K has been replaced to resistance 22 by supplier, cause the level to not be low.
I have used the resistance 22K to replace the resistance 22,the reset signal is normal.
This issue has been solved, the pull-up resistance 22K has been replaced to resistance 22 by supplier, cause the level to not be low.
I have used the resistance 22K to replace the resistance 22,the reset signal is normal.
Hello Robin_Shen
I see this file, our system use 24MHz bus clock, so I think 500us absolutely fit with time requirement of signal reset, the low voltage is 0-0.3VDD(0-1.5v),the voltage also fit with the datasheet. Reset circuit is as below, signal reset_sbc is the input signal reset.
So could you give me any advice?
Hi asd046012,
Please refer the "5.2 RESET system" of AN5426, Hardware Design Guidelines for S32K1xx Microcontrollers
After flash program into the MCU, this phenomenon will no longer appear on the reset line.
Best Regards,
Robin
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