MSP430FR6043: evm430fr6043 & evm430fr6047

GARRET CRISLER

I am laying out PCB for MSP430FR6043 chip. This chip now has two PVCC pins between the inputs for the ultrasonic transducers. The EVM430 board uses a 6047 chip however that chip only has one PVCC input pin. Should the pins on the 6043 chip be tied together and then decoupled with a single capacitor/inductor network? Or should each PVCC pin be decoupled with its own cap/inductor network?? Also the data sheet shows a much simpler decoupling network than what is used on the EVM board. Is the data sheet version adequate or is the more robust EVM network needed??

over 7 years ago

0 Tomasz Kocon over 7 years ago

Guru 26200 points

Hello,

according to the datasheet: http://www.ti.com/lit/ds/symlink/msp430fr6043.pdf
this MCU has two pairs of PVCC/PVSS.

My understanding is that 2 sets of 22 uF, 1 nF and 22 R are needed.

0 GARRET CRISLER over 7 years ago in reply to Tomasz Kocon

Intellectual 520 points

This is confusing. The bold writing above the picture states a 1 uf and a 22 uf cap are needed. Then below in the drawing a 1 nF cap is used??? That is a factor of 1000 different!! Typo?? If so which is correct?

0 Tomasz Kocon over 7 years ago in reply to GARRET CRISLER

Guru 26200 points

I missed that.

Refer to this:

and check this:

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MSP430FR6043: evm430fr6043 & evm430fr6047