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idata
Community Manager
1,078 Views

Custim board with Curie issue - property power connection

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Hello.

I'm designing custom board with Curie and I have some troubles with power management.I planned 3V3 main voltage.

First question - proper connect of AON_IO_VCC

First, in Curie Module Design guide there is;

3.2.3 AON IO Power

This pin powers the AON block of the Intel® Curie™ and must comply with the timing sequence shown in Figure 12

If the IO voltage is 1.8V, it is recommended to use LDO1P8_VOUT to power this pin.

It can be fed by other power supplies also provided it meets the power sequence requirements. If the IO voltage is set to 3.3

VDC, then supplying from the ESR1 regulator is permitted

But in this document there is another point ov view:

3.4.1 ESR1 and ESR2 regulators

Do NOT use these regulators. It is highly recommended to connect the pins below to reduce leakage current.

· ESR1_VBAT and ESR2_VBATT - connect to ground

· ESR1_LX and ESR2_LX - leave open

· VDD_PLAT_3P3 and VDD_PLAT_1P8 - connect using 10k resistor to ground

So, what is the right way - using ESR1 or not using for powering AON_IO_VCC?!

Second question - possibility of connect AON_IO_VCC to BUCK_VOUT

In the design guide and Curie's datasheet there is no information about possibility of the connect AON_IO_VCC to BUCK_VOUT. Can it be right and good decision? In my case I don't want to use external LDO or DC converters for supplying AON_IO_VCC. And I planning powering by BUCK_VOUT external ICs and sensors for my application.

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1 Solution
idata
Community Manager
46 Views

In datasheet, 4.1:

Intel® Curie™ module has 1.8 V and 3.3 V regulators meant for use by platform

applications in addition to a 1.8 V regulator to power internal circuits. These internal

LDO and converters are optional to use and application can provide their own converter

or power source to meet their requirements.

• ESR1 provides platform 3.3 V, which can be used by external platform devices.

• ESR2 provides platform 1.8 V, which can be used by external platform devices.

• ESR3 provides host 1.8 V, which is fed back into Intel® Curie™ module to power

the host

About connect BUCK_OUT to AON_IO_VCC there is some information in datasheet 2.3.2:

Buck converter output of 1.8 V / 3.3 V. It can be connected and used for Awake ON (AON) IO

supply voltage.

Connect a 0.1uF decoupling capacitor.

View solution in original post

3 Replies
idata
Community Manager
47 Views

In datasheet, 4.1:

Intel® Curie™ module has 1.8 V and 3.3 V regulators meant for use by platform

applications in addition to a 1.8 V regulator to power internal circuits. These internal

LDO and converters are optional to use and application can provide their own converter

or power source to meet their requirements.

• ESR1 provides platform 3.3 V, which can be used by external platform devices.

• ESR2 provides platform 1.8 V, which can be used by external platform devices.

• ESR3 provides host 1.8 V, which is fed back into Intel® Curie™ module to power

the host

About connect BUCK_OUT to AON_IO_VCC there is some information in datasheet 2.3.2:

Buck converter output of 1.8 V / 3.3 V. It can be connected and used for Awake ON (AON) IO

supply voltage.

Connect a 0.1uF decoupling capacitor.

View solution in original post

idata
Community Manager
46 Views

Hi Danil.Borchevkin,

 

 

Thank you for contacting us.

 

 

About your last reply, did it answer your questions? Or do you still have doubts about it?

 

 

If you need help creating your custom board, I recommend you to check the schematic of the Arduino 101 board, to see how those pins are connected on the board. This is the link: https://www.arduino.cc/en/uploads/Main/Arduino101-REV4Schematic.pdf

 

 

I hope you find this information helpful.

 

 

Regards,

 

-Leonardo
idata
Community Manager
46 Views

No, I realized. Thanks for your attention!

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