Hello Everyone,
Greetings of the day.
Please help me understand this issue.
I am facing a small problem in the power supply of the openSDA chip.
The MK20DX128VFM5 chip is used for this purpose. I am sharing the screenshot as well for your reference.
The chip has a pin no. 5, VOUT33; which gives out 3.3V output. Again, at pin no. 1 (VDD1)and 7(VDDA), we need to supply 3.3V to the chip.
My question is, are we going to supply 3.3V separately to this VDD1 and VDDA pins; or can we use the output of VOUT33 to supply the same chip.
I have never seen a chip being powered up from its own output.
Please help.
Thank you for your time.
Hi ankan_creatara,
There is a USB regulator in this MCU, so VOUT33 can power VDD VDDA when VREGIN is connected to VBUS. Kinetis K20: 50MHz Cortex-M4 up to 160KB Flash (32 pin)
Best Regards,
Robin
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Hi @Robin_Shen ,
Thank you so much for your time and support.
PART-A
Could you kindly help me understand what exactly V_TGTMCU is? As I can see in the schematic as well, VDD is same as V_TGTMCU is it true? What is the value of VDD here? Is it 3.3V or 5V?
Please help.
PARTB
There are other instances of VDD as well. I have attached a screenshot of the same for your kind reference.
Are both the VDD of PART A and PART B same? If not, what would be the value of VDD in PART B?
Please help
Thank you for your time.
The voltage of VDD is 5V by default on S32K144EVB, because J10 Jumper defaults to DNP, and P5V0 is connected to VDD through R64.
These level shifter chips are needed because the voltage of VDD may be different from P3V3_SDA or P5V_SBC due to the J10 jumper setting.
Hi ankan_creatara,
There is a USB regulator in this MCU, so VOUT33 can power VDD VDDA when VREGIN is connected to VBUS. Kinetis K20: 50MHz Cortex-M4 up to 160KB Flash (32 pin)
Best Regards,
Robin
-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!
- We are following threads for 7 weeks after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
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