https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/Welcome to the MSP Low-Power Microcontrollers Section of the TI E2E Support Community, with support for MSP430™︎ and MSP432™︎ products. Ask questions, share knowledge, explore ideas, and help solve problems with fellow engineers.en-USTelligent Community 13https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1682602/msp430fr5994-fmeda-safety-data-of-msp430fr5994irgzr---defendtexWed, 16 Sep 2026 04:36:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:b496b526-1040-4ac4-b158-fb2dc641a94fJosephine CheongPart Number: MSP430FR5994 Dear Sir/Mdm, The customer, Defendtex is requesting for FMEDA and safety data of MSP430FR5994IRGZR. Please kindly provide as I am unable to find in TI website. Thank you. Best Regards, JosephineMSP430FR5994https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1682260/msp430fr2476-detecting-an-object-passing-between-tx-and-rx-electrodes-mutual/6484804Wed, 16 Sep 2026 03:58:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:e84d27f2-af60-4321-ac3e-1609b60ec54aBill TangHi O.H, [quote userid="402494" url="~/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1682260/msp430fr2476-detecting-an-object-passing-between-tx-and-rx-electrodes-mutual"] For object passage detection, would you recommend: Mutual capacitance Self capacitance A combination of both [/quote] Unfortunately we do not have any demos regarding to where an object detection on mutual capacitance. [quote userid="402494" url="~/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1682260/msp430fr2476-detecting-an-object-passing-between-tx-and-rx-electrodes-mutual"]I found the " Pill Detection with CapTIvate " document that uses MSP430FR2676 and mentions a parallel-plate mutual-capacitance setup. Is this still considered a recommended approach for detecting floating objects between electrodes[/quote] This is an experiment done by an previous engineer meant to be a quick show case. But as he mentioned in the slides, mutual capacitance mode is recommended for the design and further investigation is needed base on your design. ... [quote userid="402494" url="~/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1682260/msp430fr2476-detecting-an-object-passing-between-tx-and-rx-electrodes-mutual"] For object passage detection, would you recommend: Mutual capacitance Self capacitance A combination of both [/quote] Mutual capacitance is recommended in this case as objects don't have strong connection path with ground therefore self-capacitance won't be the ideal choice. [quote userid="402494" url="~/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1682260/msp430fr2476-detecting-an-object-passing-between-tx-and-rx-electrodes-mutual"] Are there any guidelines for: Electrode size TX-RX spacing Sensitivity optimization Detecting very small dielectric targets [/quote] electrode side is recommended 10 mm x 10 mm for overlay thickness up to 2 mm with RX TX spacing or 0.5 mm. For more design details please refer to CapTIvate Design Guide , you able to find the layout and ground best practices for your design and how to use the TI CapTIvate design center GUI to optimized the sensitivity using the software. Best regards, Billhttps://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1679951/msp430f67641a-msp430f67641a-three-phase-meter-resets-on-load-insertion/6483922Tue, 15 Sep 2026 14:38:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:0b707cac-1a94-4272-aac4-3867aac105bcMassimo RomanoNew event: It has frozen in the middle of a cycle (board led was enabled), but WDT didn't reset the circuit after time elapsed. I expected WTD to reset the MCU eventually. WDTCTL = WDTPW | WDTSSEL__VLO | WDTIS__512K; // WDT , VLOCLK (~10kHz) SFRRPCR = SYSRSTRE | SYSRSTUP | SYSNMI; //rest is NMI SetVCore (PMMCOREV_3); //routine that set PMMCOREV at level 3 step by step) //clock config UCSCTL3 = SELREF__REFOCLK; // FLLRef = internal REFOCLK (~32.768kHz) UCSCTL4 = SELA__REFOCLK | SELS__DCOCLKDIV | SELM__DCOCLK; // ACLK = REFOCLK, SMCLK = DCO/n, MCLK = DCO __bis_SR_register (SCG0); UCSCTL0 = 0x0000 ; UCSCTL1 = DCORSEL_6; UCSCTL2 = FLLD__1 | 600 ; __bic_SR_register (SCG0);https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1676107/msp430g2553-interfacing-msp-gang-programmer-with-a-raspberry-pi/6483918Tue, 15 Sep 2026 14:36:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:865164d3-07ed-4ea3-862d-18f961f9e97eBrian LeeHi Kartik, Sorry for the delayed response, I was out of office. Additionally, I think for this issue it would be best to contact Elprotronic's support directly. I can provide additional support for how to use the MSP-GANG with our MSP devices, but our team does not have the expertise for interfacing with the programmer outside of the GUI and DLL. Elprotronic's Contact information: Support email - info@elprotronic.com Official Website - Elprotronic Inc. | Provider of Flash and Gang Programmers Best Regards, Brianhttps://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1682057/msp430fr6043-fluid-flow-and-bubble-sensing/6483889Tue, 15 Sep 2026 14:12:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:f8a38e41-925a-4f31-8ba3-a0dcb0bcd4c1Peter JiangHi Marvin, I'm afraid our current portfolio for USS solution only have MSP430FR604x/MSP430FR504x devices and no other options could be provided so far, thanks. Best Regards, Peterhttps://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1676503/mspm0g3519-gui-composer-data-export/6483813Tue, 15 Sep 2026 12:47:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:eff0bf9a-d23f-4fc8-b052-2d48fa2e34c5Brian DempseyHi Adrien, Yes. Use GUI Composer’s nonvisual gc-core-streamsaver component. An Export button can call start(), write(), and stop() to download the latest streaming values as TXT or CSV. Read each value with: bindingRegistry.getBinding('streaming.variableName').getValue() For continuous logging, call write() whenever new data arrives. Here is an example.https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1676918/msp430fr5739-ep-which-is-the-correct-package-drawing-to-use-rha0040d-or-rha0040n/6483795Tue, 15 Sep 2026 12:31:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:65155cc2-f6f3-487d-a21b-07db3d486392Brian DempseyHi, Please use RHA0040D (4225822/A) for the MSP430FR5739-EP. The current device datasheet specifies the 2.9 ± 0.1 mm exposed pad. RHA0040N is a different package variant, not a newer revision of RHA0040D. Follow the complete RHA0040D land and stencil pattern unless TI formally updates the device datasheet or issues a PCN.https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1667690/mspm0g3519-gui-composer-buttons/6483750Tue, 15 Sep 2026 11:37:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:b0a06b86-5147-4e23-a031-ee76e7ad4053Brian DempseyHi Adrien, You did not miss anything—bindableTrigger is not exposed for this GCv3 button. My previous guidance was incorrect. Remove the tooltip binding; it only changes the hover text. Add this once to index.gui: Use this in index.js: import { GcWidget } from './components/@ti/gc-widget-base/lib/GcWidget'; import { bindingRegistry } from './components/@ti/gc-core-databind/lib/CoreDatabind'; let sequence = 0; async function init() { await bindingRegistry.waitForModelReady('streaming'); const button = await GcWidget.querySelector('#button_apply_basic'); const command = bindingRegistry.getBinding('streaming.button_set_basic'); button.addEventListener('click', () => { command.setValue(++sequence); }); } document.addEventListener('DOMContentLoaded', init); Each click sends a new value for button_set_basic (1, 2, 3, etc.), ensuring the MSPM0 callback runs every time. Use the exact case-sensitive name in GUI_RXCommands. You do not need to edit index.json. Let me know if this works. -Brianhttps://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1675769/tms320f28p550sg-xrsn-reset-threshold-levels-and-lm809-reset-circuit-validity-across-power-up-ramp-for-tms320f28p550sg-and-tms320f28062/6483703Tue, 15 Sep 2026 10:48:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:360867c9-57e0-4bf5-93a0-63f338a0f939MatthewPate[quote userid="463532" url="~/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1675769/tms320f28p550sg-xrsn-reset-threshold-levels-and-lm809-reset-circuit-validity-across-power-up-ramp-for-tms320f28p550sg-and-tms320f28062/6468804"] Could you clarify: If XRSn is not reliably recognized as Low at this "gray zone" voltage, what state does the MCU actually maintain during this ~200ms period? Does boot sequencing and peripheral initialization proceed correctly, or is behavior undefined/undetermined in this condition? What is the minimum required reset assertion time (XRSn held low) for the device to properly initialize? Could you also clarify the difference in behavior between POR/BOR and the external /XRS (XRSn) reset path — specifically, do they initialize the device through the same internal reset sequence, or are there differences? Separately: this exact circuit (LM809 + TMS320F28062) has been in production use for 10 years without reported field issues. Given the concerns raised above, could you help us understand why this configuration has been working reliably in practice? [/quote] So, the reset from the internal PMM logic still routes internally https://www.ti.com/document-viewer/TMS320F28069/datasheet#GUID-E82B4338-02BD-4C1E-8461-FA2DE745F951/TITLE-SPRS698SPRS6984870 and gets "ANDed" with the external signal from XRSn, but I can't explain why you would see any voltage at all on XRSn during this time. Note in this same figure that the same signal PBRSn should be driving XRSn to ground. With that said the device still should be in reset, since we are logically AND'ing both internal and external. This section specifies the XRSn assertion time for both the boot pins https://www.ti.com/document-viewer/TMS320F28069/datasheet#GUID-ADE5B407-FFEB-4AD4-B257-76DC7A4FA784/TITLE-SPRS698SPRS6982617 , if the reset were externally generated we would want to hold it for 32 OSCCLK cycles. For the last point, the only issue I have with the LM809, is that its not clear to me how the POR/BOR or the WDRSn will correctly cause a reset if the LM809 is actively driving the node high. The likely cause is there is more margin on the devices for VIL than what is in the DS, especially if the operational conditions are not at the min/max of the DS. This, coupled with the redundant internal path I mentioned above is most likely giving a positive outcome system wise. [quote userid="463532" url="~/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1675769/tms320f28p550sg-xrsn-reset-threshold-levels-and-lm809-reset-circuit-validity-across-power-up-ramp-for-tms320f28p550sg-and-tms320f28062/6468804"] Question 2: Rationale for recommending TPS3840 over the existing LM809 You mentioned that the XRSn behavior may be related to LM809 being a push-pull output, while XRSn is open-drain/bi-directional. However, on checking the TPS3840 datasheet, its RESET output also appears to be push-pull, same as our existing LM809. Could you clarify what specific difference between TPS3840 and LM809 led to this recommendation, if both have push-pull outputs? [/quote] I should have been more specific, the TPS3840 has an option to make the output drive be OD according to the below orderable info, specifically I was referring to the "DL" part designator device. [quote userid="463532" url="~/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1675769/tms320f28p550sg-xrsn-reset-threshold-levels-and-lm809-reset-circuit-validity-across-power-up-ramp-for-tms320f28p550sg-and-tms320f28062/6468804"] Question 3: Clarification on when the issue occurs To clarify the scope of the issue: the behavior in question only occurs during the power-up ramp. Once the system reaches steady-state (post power-up), our reset circuit reliably holds XRSn below 0.8V. We wanted to confirm this distinction is understood correctly, since our follow-up questions are focused specifically on the power-up transient period. [/quote] So, for the F28P55x I know that as we near the release point wrt VDDIO there may be some toggling during power up specifically. This is related to the implementation of the PMM, but the device will not run any system code until the threshold is met according to the DS. For the F28069 the only explanation I can give for this voltage level is if the F2806x were still attempting to assert reset(low) and the LM809 were actively driving it high. Now, the F28069 does have a pretty large hold off time, even after the voltage threshold is met, something on the order of 600us; where the voltage may be in the correct range, but we have not stopped releasing reset. Have we captured the XRSn pin along with VDDIO on a scope? This might help prove this out. [quote userid="463532" url="~/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1675769/tms320f28p550sg-xrsn-reset-threshold-levels-and-lm809-reset-circuit-validity-across-power-up-ramp-for-tms320f28p550sg-and-tms320f28062/6468804"] Question 4: XRSn pin direction behavior Could you confirm whether the following is accurate: the reset IC output is push-pull, and the XRSn pin (being bi-directional) is high-impedance when configured as an input, and open-drain when driven as an output (e.g., by the internal watchdog)? [/quote] Correct [quote userid="463532" url="~/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1675769/tms320f28p550sg-xrsn-reset-threshold-levels-and-lm809-reset-circuit-validity-across-power-up-ramp-for-tms320f28p550sg-and-tms320f28062/6468804"] Question 5: Concern about inrush current If the reset IC output is driving High while XRSn is simultaneously being driven low by the internal watchdog output (open-drain), wouldn't this create a significant inrush/contention current between the push-pull reset IC output and the MCU's internal watchdog driver? [/quote] Yes, and that is my concern as well. We should be seeing a current spike on whatever rail the LM809 is sourced from. If that is not the case, please let me know. Best, Matthewhttps://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1677549/mspm0l1106-power-on-initial-current-is-high/6483643Tue, 15 Sep 2026 09:44:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:e8519244-0f68-48a1-a724-5407fc0142e7Selvam KrishnanHi Sal. May I have update on required voltage level for the current 71uA/MHZ Thansk Selvamhttps://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1682260/msp430fr2476-detecting-an-object-passing-between-tx-and-rx-electrodes-mutualTue, 15 Sep 2026 08:27:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:e0f820f6-7202-4bca-915e-78f882f4f631O.HPart Number: MSP430FR2476 Other Parts Discussed in Thread: MSP430FR2676 Hi experts, I am evaluating the CapTIvate technology on MSP430 devices for a non-touch object detection application. My goal is not touch sensing, but detecting when a Small insects passes through the electric field between a TX electrode and an RX electrode. Sensor configuration I am considering a mutual-capacitance structure similar to the following: The electrode spacing is expected to be several millimeters to around 10 mm. Questions Has TI validated or demonstrated a mutual-capacitance configuration where an object is detected while passing between TX and RX electrodes rather than touching the sensor surface? I found the " Pill Detection with CapTIvate " document that uses MSP430FR2676 and mentions a parallel-plate mutual-capacitance setup. Is this still considered a recommended approach for detecting floating objects between electrodes? For object passage detection, would you recommend: Mutual capacitance Self capacitance A combination of both Are there any guidelines for: Electrode size TX-RX spacing Sensitivity optimization Detecting very small dielectric targets Best regards, O.HMSP430FR2476MSP430FR2676Test & Measurementhttps://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1679951/msp430f67641a-msp430f67641a-three-phase-meter-resets-on-load-insertion/6483530Tue, 15 Sep 2026 08:13:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:792f81f5-18b6-4183-803d-75f785e4353bMassimo RomanoI was wondering. By reference design VDSYS is connected to AUX3. Shall I try to connect to DVCC instead?https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1679951/msp430f67641a-msp430f67641a-three-phase-meter-resets-on-load-insertion/6483470Tue, 15 Sep 2026 07:35:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:46afdd50-0b2f-4530-882a-bf45447bf897Massimo RomanoThis happens only when a large load is switched in. I observed a common‑mode transient with a 5 V peak and a base frequency around 15 MHz (plus harmonics). During no‑load or steady‑load conditions, no resets occur. The issue appears when a large load (2 kW) is enabled through a relay. If the relay closes when the mains sine wave is near its peak, the circuit is hit by a transient similar to a step response. This obviously generates noise that reaches the circuit and couples into the logic. The noise is likely coupled unevenly through the ground plane and the PCB traces, creating a differential‑mode effect on the MCU pins. It is very hard to observe directly, because the oscilloscope earth affects the measurement; I was only able to detect the noise on the AFE using a LISN with 50‑ohm resistors. Here is what I tried, unsuccessfully: I tried using the internal low‑frequency oscillator for the watchdog timer. It barely mitigated the problem, but after a few hours the device froze again. I am honestly surprised that the watchdog does not reset the MCU properly, leaving it stuck in a half‑reset condition. What I mean is that the MCU appears to be in a reset state, with GPIOs in their reset condition, but it does not start up again. At startup, I first configure the watchdog to use the internal oscillator, then I disable the RESET pin, and then I increase VCORE to level 3 step by step. By the way, the reset cause is now always “watchdog timer elapsed time”, and it works correctly almost every time. To test the solution, I used a test bench that switches a 2 kW load on and off every second. After several hours, with multiple resets and recoveries (the reset cause was always watchdog timeout, meaning the device froze several times), it eventually froze after a reset.https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1681973/mspm0l1228-mspm0l1228-shutdown-mode-current-consumption-around-100-a/6483391Tue, 15 Sep 2026 06:31:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:3f7de3cf-5197-4fb0-8faa-f39565f663e0Janz BaiHello cychang, Firstly, please confirm you are not in debug mode to measure the current. Then, please check whether there are any other external circuit between VDD and GND which will use current Finally, before entering SHUTDOWN mode, we recommend you reset all peripherals, and configure all GPIO IOMUX to "unconnected" status which will perform Hi-Z to external (except for the GPIO you used to wake MCU up from SHUTDOWN). BR, Janz Baihttps://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1679951/msp430f67641a-msp430f67641a-three-phase-meter-resets-on-load-insertion/6482770Mon, 14 Sep 2026 19:40:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:a43a078c-c447-420f-b176-392d505f0f85Luke LedbetterHi Massimo, Are these conditions still when load is applied, or does this happen even under no load conditions? Do you have varistors or any high-transient protection on the input stage for the votlage? Regards, Lukehttps://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1682057/msp430fr6043-fluid-flow-and-bubble-sensingMon, 14 Sep 2026 15:37:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:e820df68-9e8b-4324-ade9-1025d0470561Marvn ArcangelPart Number: MSP430FR6043 Hi Experts, I need a solution for liquid flow with bubble sensing. Here is the requirements: 1 pair of 2Mhz piezo transducers for liquid and bubble detection bubble detection of ~1mm size with an estimated dwell time of 1ms. Sample rate of ~10kHz. The water flow will be measured by time of flight. The bubble size will be measured by amplitude. Upon review the MSP430FR604x seems to be the recommended product however, with the required sensing rate of 10kHz, this product seems to be inadequate, In addition, the USS software library is designed for <10z and maxed out at 500hz when modified. Do we have other solution that we can offer? Thanks and regards, Marvinmsp430fr6043https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1681973/mspm0l1228-mspm0l1228-shutdown-mode-current-consumption-around-100-aMon, 14 Sep 2026 12:03:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:1ccde473-85f6-41b5-8999-f3038b54ac4fcychangPart Number: MSPM0L1228 Dear Sir/Madam, We are testing the MSPM0L1228 in Shutdown mode, but our PCBA current consumption is still around 100 µA, which is higher than the expected MCU low-power current. Test conditions: VDD = 3.3 V VBAT = 3.3 V Measured PCBA current = ~100 µA Power mode = Shutdown(DL_SYSCTL_setPowerPolicySHUTDOWN()) Could you please advise: Is there any required configuration before entering Shutdown mode to achieve the specified low-power current? Are there any GPIO, peripheral, clock or other modules that need to be disabled/configured before entering Shutdown? Are there any recommended register settings or TI example code for minimum current Shutdown operation? Could GPIO states, VDD/VBAT configuration or external connections cause this level of current?Energy infrastructureMSPM0L1228https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1679951/msp430f67641a-msp430f67641a-three-phase-meter-resets-on-load-insertion/6482162Mon, 14 Sep 2026 10:29:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:ccb23bbf-cfe4-4d10-87f1-911b54aac5ccMassimo RomanoHello, there is no NMI ISR in the code. There's no ISR to "get stuck in" or fail to exit from. First i noticed that the device froze after a WDT reset, and it was resettable with reset PIN, so de device had never reached the main(), since first instructions in main are WDTCTL = WDTPW | WDTSSEL__ACLK | WDTIS__512K; SFRRPCR = SYSRSTRE | SYSRSTUP | SYSNMI; I thought the problem was Vcore, since was on level one and i tried to run at 19.8Mhz So now I set Vcore at level 3 (1.93V) The device has run smoothly until now, and i thought i solved my issure. After few hours this morning i found the device was frozen like the WDT started but not completed the reset, in fact this was the situation Reset pin was not available(no possible to reset by pulling down reset pin) Vcore was 1.9V (level 3) I assume the WDT since all LED pins was in reset condition. Was like it tried to reset but it was unable to complete the reset. It froze and hanged on reset. Device was not in debug at that moment. Was under test and It ran smoothly for hourshttps://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1670910/mspm0c1104-device-seems-to-go-into-reset-exactly-10s-after-power-up-every-time/6481837Mon, 14 Sep 2026 03:01:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:287274e9-ea34-4f2d-af96-ed3cdfcd9e55Pengfei XieHi Parker, Thanks for information. Also if we could test on 3.3V power supply, we could also check whether the issue is impacted by supply voltage. (I think it is worth a try).https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1680243/msp430f5325-msp430f5325---vref-with-an-external-capacitor/6481828Mon, 14 Sep 2026 02:43:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:1d00c032-96de-491a-b43a-fcf1816e3988Pengfei XieHi Joerg, It is recommended to use an external capacitor on VREF pins if you set REFOUT as 1. A longer sample-hold time is trying to improve ADC accuracy by getting a more stable input voltage, but the capacitor in VREF pin is trying to improve accuracy from reference side.