Gopakumar G

MK61FN1M0VMJ12  power sequencing

Discussion created by Gopakumar G on May 26, 2016
Latest reply on May 31, 2016 by Hui_Ma

Kindly help me with the following

1.In the datasheet of MK61FN1M0VMJ12, in power up sequencing, it was given like

 

Power sequencing Voltage supplies must be sequenced in the proper order to avoid damaging internal diodes. There is no limit on how long after one supply powers up before the next supply must power up. Note that VDD and VDD_INT can use the same power source.

The power-up sequence is:

1. VDD/VDDA

2. VDD_INT

3. VDD_DDR

 

My question is

 

a. If I'm using same 3.3V for all the three voltages do the sequencing is still required ( I'm not using DDR in my application)

b. What is meant be "Note that VDD and VDD_INT can use the same power source." ? does it means that VDD and VDD_INT dont require power sequencing if both voltages are from same source?

 

2. I cant find details of coupling capacitors that should be put for the supply voltage pins in the datasheet. Can you please help me find the document containing the information

 

thanks

Kumar

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