MSP430G2553: Does MSP430G2553 can operate at 16MHz with 3V supply.

Vishal Patil

Part Number: MSP430G2553

Hello, I am working on one application, in which I need to do some mathematical calculations, So Needs to run MSP430 on 16MHz. In end application, I want to reduce power consumption, so want to operate it on the 3V supply. Can MSP430G2553 operate on 16MHz with 3V supply?

Thanks.

over 7 years ago

0 Harish Singh over 7 years ago

Intellectual 995 points

HI Vishal,

The recommended operating conditions in the datasheet tells that minimum supply for 16MHz clock should be 3.3V.

But in the other tables on page no. 29 & 30, it shows the DCO clock as 16MHz clock at 3V supply voltage.

I will suggest that you should try with internal DCO as 16MHz at 3V.

I'm also curious for other answers as well.

Regards,

Harish KS

0 Vishal Patil over 7 years ago in reply to Harish Singh

Prodigy 100 points

Yes I referred datasheet but got confused. I am using Internal DCO, not external clock.

0 Jace H over 7 years ago in reply to Vishal Patil

TI__Guru 56685 points

Vishal,

For safe operation, please refer to Figure 1 in the datasheet. The recommended voltage for a system clock (MCLK) of 16MHz is 3.3V. Your DCO can be at that frequency at 3V, but you would need to divide it down before feeding to MCLK in order to operate it within specification.

0 Vishal Patil over 7 years ago in reply to Jace H

Prodigy 100 points

Thanks Jace. So I can operate DCO at 16MHz at 3V, but to drive CPU core I need 3.3V. and if I don't have 3.3V supply I need to divide 16MHz DCO frequency down to safe operating zone. right.

0 Jace H over 7 years ago in reply to Vishal Patil

TI__Guru 56685 points

Vishal,

For this particular part, that it correct. The table I pointed to in my reply is what you should follow in terms of system frequency.

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MSP430G2553: Does MSP430G2553 can operate at 16MHz with 3V supply.