Question: How to handle power-off reset of MSP430G2553 microcontroller?

ygyh

Question: How to handle power-off reset of MSP430G2553 microcontroller? [Copy link]

 

I would like to ask all the experts to help me... Please advise: How to effectively reset the MSP430G2553 microcontroller and make it work normally after the voltage is slowly restored after it is powered off for a period of time? How to program the supply voltage monitor (SVS) in the software - which registers should be operated specifically?

The schematic diagram of the MSP430G2553 part is as follows

sint27

I haven't used this chip.

However, most MCUs have a low voltage reset function, and you can also choose the reset voltage

tagetage

What is the problem you are facing now? ? State the problem directly. MSP430G2553 has a power-on reset function.

ygyh

tagetage posted on 2022-4-21 12:16 What is the problem you are facing now? ? State the problem directly. MSP430G2553 has a power-on reset function.

I saw in the data about MSP430G2553 that its power supply voltage monitor (SVS) has a control register SVSCTL. But when programming the register SVSCTL, the compiler fails - it prompts "SVSCTL" is undefined. I checked the header file of MSP430G2553.h and couldn't find "SVSCTL". I don't know how to operate the power supply voltage monitor of MSP430G2553. Please give me some specific advice. . . Thanks

littleshrimp

https://e2echina.ti.com/support/microcontrollers/msp430/f/msp-low-power-microcontroller-forum/118946/msp430g2553

ygyh

littleshrimp published on 2022-4-21 15:02 https://e2echina.ti.com/support/microcontrollers/msp430/f/msp-low-power-microcontroller-forum/118946 ...

Is there no other solution?

ygyh

ygyh posted on 2022-4-21 15:40 Is there no other solution?

I read the MSP430x2xx Family.pdf document. . . The register SVSCTL for the supply voltage monitor (SVS) cannot be used (the header file "does not recognize" it) - is it because "msp430g2553 only has undervoltage reset, not svs"? Then can the "undervoltage reset" "wake up" the MSP430G2553 microcontroller when the voltage slowly rises after power failure? How to coordinate the related hardware design? Please give me specific advice... Thanks... . . . . . . . .

tagetage

ygyh posted on 2022-4-21 13:12 Regarding MSP430G2553, I saw in the data that its power supply voltage monitor (SVS) has a control register SVSCTL. But programming the register SVSCTL...

What is the problem you are facing now? ? State the problem directly. -----Why do you operate SVSCTL when you have nothing to do? ? ? ? If the power-on is slow and the MCU cannot be reset, you need to solve the problem of slow power-on, not operate the SVSCTL register. You need to explain what problem you are facing now, and netizens will help you solve it, not the problem of the SVSCTL register you think.

ygyh

tagetage posted on 2022-4-21 16:53 What is the problem you are facing now? ? State the problem directly. -----Why do you operate SVSCTL when you have nothing to do? ? ? ? If you power on slowly, the microcontroller will not...

The problem is: in the electrical performance slow-down and slow-up test (0.5V per minute), when the voltage is slowly dropped from 12V to 0V, and then slowly increased from 0V to 12V, the microcontroller MSP430G2553 will not work. . . . . On the same board, other chips such as STM32F103 can still work normally. Now the question is how to make the MSP430G2553 work normally after the slow-down and slow-up. . . . I would like to ask for specific advice from the masters. . . Thanks

大秦正声

The solution lies in the chip on the board! Why do we need 430 when we have a reliable 103? We need to change the hardware to control 430.

tagetage

ygyh published on 2022-4-22 08:16 The question is: In the electrical performance slow-down and slow-up test (0.5V per minute), when the voltage drops from 12V to 0V and then rises from 0V to 12V, the single-chip MSP430...

You are right to ask this question. This is the problem you are facing and the problem you should solve.

tagetage

1. The fact that STM32F103 works but 2553 doesn't does not mean that there is something wrong with the quality or design of 2553.

2. The slow rise and fall of voltage will have unpredictable effects on the microcontroller or peripheral circuits and should not be done by software.

3. The slow rise and fall of voltage are outside the normal operating range of the microcontroller. You can refer to the 2553 data sheet for specific requirements on voltage and time for power-on reset and under-voltage reset.

4. For this kind of problem, I personally make a hardware voltage detection circuit, which will not conduct when the voltage is lower than a certain value. For example, if you have a 12V power supply, you can generally use a PNP transistor and a 9V voltage regulator. The PNP will work only when the power supply voltage is greater than 9V, and then it will supply power to the back-end MCU. This is the most correct way to solve the problem of slow voltage rise.

ygyh

Thank you tagetage

ygyh

Daqin Zhengsheng published on 2022-4-22 08:41 The solution is in the chip on the board! Why do we need 430 when we have a reliable 103? We need to change the hardware to control 430.

Because the 430 chip is responsible for the communication of the peripheral interface PB network power line carrier... it must be separated