MSP430FR5962: MCU microcontroller enquiry

Bhavish Salian

Prodigy 30 points

Part Number: MSP430FR5962
Other Parts Discussed in Thread: MSP430WARE

Tool/software:

Hello,

For the MSP430FR5962IPNR microcontroller, could you please confirm the internal reference voltage levels associated with the VREF+ and VREF– pins?
As per our design requirements, we are powering the MCU with a 1.8 V supply. Could you also confirm whether this supply voltage would cause any issues with proper MCU functionality,
particularly in relation to the SVS (Supply Voltage Supervisor) threshold levels?
Could you please confirm if there is any major difference between the MSP430FR5962IPNR and MSP430FR5962IPMR microcontrollers, apart from the pinout?

3 months ago

0 Sal Ye 3 months ago

TI__Mastermind 24485 points

Hi Bhavish,

Bhavish Salian said:
For the MSP430FR5962IPNR microcontroller, could you please confirm the internal reference voltage levels associated with the VREF+ and VREF– pins?

See the REFOUT register bit, the VREF+ could be enabled, so that VREF+ is equal to internal VREF, or be disabled and VREF+ has no output.

Bhavish Salian said:
As per our design requirements, we are powering the MCU with a 1.8 V supply. Could you also confirm whether this supply voltage would cause any issues with proper MCU functionality,

There does have some concern here, see the below table from datasheet:

When power up, 1.8V is not enough, and we should refer the maximum value to make it robust.

The same thread refers to below: (+) MSP430FR59941: MSP430FR59941 , 1.8V power supply compliance - MSP low-power microcontroller forum - MSP low-power microcontrollers - TI E2E support forums

Bhavish Salian said:
Could you please confirm if there is any major difference between the MSP430FR5962IPNR and MSP430FR5962IPMR microcontrollers

No, they shared the same datasheet, have same features and functions. Only package and pinouts has the difference.

B.R.

Sal

0 Sampat Kumar 3 months ago in reply to Sal Ye

Prodigy 80 points

Hello Sal,

1. What is the voltage range of Internal and External voltage VREF+ & VREF- pin and how to set it.
2. How can we read the voltage at ADC pin, whether external I2C master is must for reading?
3. Is it possible to enable or disable the particular pin based on voltage reading at ADC pin, if possible, how can we implement this?
4. We have an application where an ADC pin needs to sense multiple different voltages from multiple pins, such as 1V, 1.5V, 2V, and 3.3V. Is this possible, or does the ADC pin need to be set to read only a single voltage?

0 Sal Ye 3 months ago in reply to Sampat Kumar

TI__Mastermind 24485 points

Hi Sampat,

1. We give the internal VREF supported level in datasheet, external we do not limit its range, no more than recommended voltage to MCU.

2. Not sure what you want to do, ADC read function is not related to I2C master read. You can enable interrupt for this.

3. Yes, it can be done. The GPIO can be configured based on your code.

4. Yes, it could. Make sure select a proper voltage reference for each sensing pin. The reference should larger than the sensed voltage.

We have a lot of example project with detail description, you can find all you need in the MSP430Ware:

https://dev.ti.com/tirex/explore/node?node=A__ACwz9fKcpVIFjPJXZepUBg__msp430ware__IOGqZri__LATEST&placeholder=true

[ADC example to set/reset pin]

B/R/

Sal

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