MSP430F5171: Microcontroller with more speed

Enzo Ternavasio

Part Number: MSP430F5171
Other Parts Discussed in Thread: TMS320F280021

I use MSP430F15171 in many applications/systems but i've found thta its speed does not allow to acquire from 3 ADS131E8 (Mux with 8 Ad 24bit each) at the same time.

My goal is to acquire from 3x8=24 channels.

Is there some other micro i could mouve to fulfill this task?

Thanks for advices, Enzo

over 2 years ago

0 Eason Zhou over 2 years ago

TI__Mastermind 35720 points

Can you tell me the limit for this MSP430? SPI speed or CPU speed?

0 Enzo Ternavasio over 2 years ago in reply to Eason Zhou

Intellectual 935 points

Hy, SPI clock is 12.288MHz, half the clock of microporcessor, 24.576MHz. This is maximum value of MSP430F5171.

Max SPI clock of ADS131E8 is 20MHz.

In this way I can sample 24 channels at 4KHz, but I do not save data in memory. This requires more time, being an SPI memory.

0 Eason Zhou over 2 years ago in reply to Enzo Ternavasio

TI__Mastermind 35720 points

Get it. I think you need a high speed SPI which can reach to 20MHz.

For TI devices, I would advice C2000, like tms320f280021. As I check, its SPI speed can reach 25MHz.

0 Enzo Ternavasio over 2 years ago in reply to Eason Zhou

Intellectual 935 points

Thanks, i'm going to check.

Enzo

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MSP430F5171: Microcontroller with more speed