AM6411: Do VMON pins need bypass capacitor?

Ma Tianfu

Part Number: AM6411

Tool/software:

Can I omit bypass capacitors for these pins if they are connected to power planes or zones right underneath the processor? there are plenty of bypass capacitors for these 1V8 or 3V3 zones for other pins.

over 1 year ago

+1 Lavanya M R over 1 year ago

TI__Intellectual 1590 points

Hello Ma Tianfu,

Thank you for the query.

I assume, you are asking about VMON_1P8_MCU, VMON_1P8_SOC, VMON_3P3_MCU and VMON_3P3_SOC pins.

For above voltage monitoring pins, capacitor is optional.

For VMON_VSYS pin, please follow Figure 8-5. System Supply Monitor Voltage Divider Circuit of AM64x data sheet.

Regards,

Lavanya M R.

0 Ma Tianfu over 1 year ago in reply to Lavanya M R

Prodigy 120 points

Thanks for your confirmation.

0 Lavanya M R over 1 year ago in reply to Ma Tianfu

TI__Intellectual 1590 points

Thank you.
Have a nice day

Regards,

Lavanya M R.

0 Kallikuppa Sreenivasa over 1 year ago in reply to Lavanya M R

TI__Guru**** 193139 points

Hello Ma Tianfu,

Please refer additional inputs:

VMON_1P8_SOC, VMON_3P3_SOC

We do not recommend a decap. This is the supply seen by the device internally. This depends on the power supply quality and customer can decide the implementation based on the supply monitor inputs routing .

Regards,

Sreenivasa

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AM6411: Do VMON pins need bypass capacitor?