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/1682997/msp430fr6047-msp430fr6047-need-help-for-ultrasonic-flow-meter-s-schematic-review/6526874Sat, 31 Oct 2026 09:26:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:aa8a58be-711a-49ee-a374-7a08c8d95e85Phuong DangHi Peter, I am currently trying to flash an example program onto my custom board (in the schematic i sent you) by using the on-board ezFet debugger from EVM430-FR6043 kit. Here is the setup process I followed: 1: Provided independent power to the custom board. 2: Connected the core SBW / JTAG signals from the kit's eZ-FET section to the target board ( TEST/SBWTCK , RST/SBWTDIO , VCC , and common GND ). However, whenever I attempt to debug or flash, CCS throws an error stating: "MSP430FR6047 Unable to connect to MSP430FR6047... Error connecting to the target: Unknown device" . Could you please advise on what might be causing this "Unknown device" error with this wiring setup, or if there are any specific isolation jumpers on the EVM that I need to configure? Thanks a lot for your help! Best regards, Phuonghttps://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1693278/msp430fr5043-esd-cycle-slip-issue-of-msp430fr5043-under-radiated-electromagnetic-field/6526864Sat, 31 Oct 2026 07:17:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:1907cb2a-86a6-45a2-8500-b5313510f7f2martin dayhello peter, I have the following questions regarding the filter: 1、Is there a maximum order limit for the filter? How should I proceed if I want to use a different filter order? Are there any related example routines available? 2、If I use the current 18th-order filter, how much will the power consumption increase (what is the additional execution time)? 3、My current sampling frequency is 8 MHz. Do I need to change it to 4 MHz to ensure the filtering effectiveness?https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1693977/mspm0g1106-mspm0g1106-the-solder-balls-are-oxidized/6526558Fri, 30 Oct 2026 17:44:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:82fceb47-8b14-45bb-8d96-8fc578a8be0cOwen LiHi Suri, After discussion with my team, the light discoloration and oxidation is a normal understood by product of material left in storage over time and should not impact solderability performance. Best, Owenhttps://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1693278/msp430fr5043-esd-cycle-slip-issue-of-msp430fr5043-under-radiated-electromagnetic-field/6526490Fri, 30 Oct 2026 16:48:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:a07c30c2-cb46-4080-bedc-63d4b7baa606martin dayAre there more detailed methods or examples for using this bandpass filter? My current transducer frequency is 1 MHz and the sampling frequency is 8 MHz.https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1693977/mspm0g1106-mspm0g1106-the-solder-balls-are-oxidized/6526473Fri, 30 Oct 2026 16:35:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:512c85ad-0d22-4159-a450-427782032786Owen LiHi Suri, I will pass this along to my team and get back to you soon. Best, Owenhttps://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1693278/msp430fr5043-esd-cycle-slip-issue-of-msp430fr5043-under-radiated-electromagnetic-field/6526429Fri, 30 Oct 2026 16:03:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:97d709c4-04da-4777-9e48-f29258be2c0bPeter JiangHi Martin, Thanks for sharing the new testing results, yes, the signal is affected significantly according to your EMC testing results. In order to eliminate external interference especially during the ESD testing, commonly we recommend adding TVS tube(like TPD4E1U06) on the two channel pins(CH0/CH1) for ESD protection as shown below. Moreover, you can try to enable the bandpass filtering in the code to improve the system robustness, please refer to FAQ on ultrasonic sensing technology for the details on how to enable the filter. Best Regards, Peterhttps://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1693278/msp430fr5043-esd-cycle-slip-issue-of-msp430fr5043-under-radiated-electromagnetic-field/6526334Fri, 30 Oct 2026 14:48:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:58ec13a8-42aa-4ce4-8976-5c0523c01746martin dayDuring the EMC testing, waveforms with cycle slips were captured, showing a baseline voltage drop.https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1689689/mspm0g3507-clarification-on-mspm0g3507-unique-device-identifier/6526257Fri, 30 Oct 2026 13:42:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:f416339e-5980-4049-b9d1-95d9add7fbf2Luca ZambranoHi, While it is possible for two devices to share the same TRACEID, the likelihood of a collision is very low. Each device also has a 32-bit OPN identifier, which can be used alongside the TRACEID to further distinguish devices and reduce the likelihood of duplicate identifiers. Best regards, Lucahttps://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1692821/msp430fr2310-i2c-communication-stop-issue/6526236Fri, 30 Oct 2026 13:20:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:a983437f-2d50-4949-a389-f5b7adf5ee92Bruce McKenneyIf your goal is to "get something running" (vs "learn how to write software-I2C"), you may find use in appnote SLAA703. This is actually written for the MSP430FR2111, so it should require only minor fiddling. It appears to deal with NACKs and (for most purposes) clock-stretching. https://www.ti.com/lit/an/slaa703a/slaa703a.pdf https://www.ti.com/lit/zip/slaa703 [Unsolicited: I recommend you move the variable "myTransaction" from the stack to a global, since (I vaguely recall) the library relies on some uninitialized fields being initially =0.]https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1694130/mspm33c321a-mspm33c321a-not-able-to-flash-and-ccs-ide-crashFri, 30 Oct 2026 08:54:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:10cdc94e-3a04-4767-8877-e58b9c5a573bRuthrapathy KPart Number: MSPM33C321A Issue 1: Once I flash the NonSecure firmware there was an error popping up(Attached the image). If we didnt click cancel for 2 pop ups before the tI cloud reload timeout error appears then the Popup appears continuously Issue 2: When I flash the Non-Secure project and Secure project seperately, sometimes I cannot reupload the either of the firmware. Only upon connecting the target and running the mass erase auto script, I am able to reflash the firmware. It is occuring more frequently but I am not sure of the reproducing steps Note: CCS IDE version - 21.0.1.10__1.12.1 Please do assist me in solving these issues. Let me know if more information is neededMSPM33C321AAerospace & Defensehttps://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1694093/mspm33c321a-mspm33c321a-how-to-do-sector-eraseFri, 30 Oct 2026 08:00:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:c69c7c9e-a5d5-4a8c-b7a7-cef9ecd179a5MING CHENPart Number: MSPM33C321A Hi, we'd like to ask about an issue we're seeing: We have MSPM33C323 parts that already contain a customer's pre-programmed firmware (0x0~0x20000). Our goal is to sector-erase only the region above 0x20000 while preserving 0x0~0x20000. We're seeing two phenomena on these parts: 1. When we perform a sector erase, reading the GSC FLSEMSTAT register (0x50047808) over SWD fails: the TAR write and the DRW read request itself return ACK OK, but the subsequent RDBUFF read returns ACK FAULT, and DP CTRL/STAT shows STICKYERR=1. Also, the AHB-AP CSW readback does not match what was written: we write 0x03000012 but read back 0x43800042. The exact same flow works fine on blank parts (CSW reads back 0x03800052 and erase succeeds). 2. Loading the blink example onto this part via CCS debug also hangs — the progress stays at "0 of 8896" (load address 0x10000000, which per the datasheet memory map is the Secure alias of flash address 0x0, i.e. the same region as the pre-programmed firmware). From the SWD trace, after the flash loader receives the program command (dst=0x10000000), nothing further happens — the mailbox status stays busy forever. On the same part, programming code located above 0x20000 works normally. What could be the cause of this?MSPM33C321Ahttps://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1694088/mspm33c321a-mspm33c321a-nonmain-configuration-crc-issueFri, 30 Oct 2026 07:56:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:382fbfea-0011-4b24-a2fa-9bb24c37736aRuthrapathy KPart Number: MSPM33C321A Other Parts Discussed in Thread: SYSCONFIG Issue 1: Whenever I change the Application Authentication Configuration parameter in NONMAIN memroy using Sysconfig and flash it is showing "NONMAIN contents corrupted, restoring to default". When I investigated the Authentication Start Address and Authentication Region Length which is set in Sysconfig is not reflected in the generated boot_config.c Note: I am using the latest version of Sysconfig: 1.28.1 and CCS: 21.0.1.10__1.12.1 Issue 2: To mitigate the above issue I manually changed the Authentication Start Address and Authentication Region Length parametrs in boot_config.c and done the compilation the error(NONMAIN contents corrupted, restoring to default) disappers but the code is not running. I am following the NONMAIN_Flash_Configuration application note but it is not running Configuration details: .SECURE_BOOT_MODE = BC_CFG_SECURE_BOOT_CRC_EN, .BC_RESERVED_0 = 0xFFFF, .USER_SECURE_APP_START_ADDR = 0x10000000, .USER_SECURE_APP_LENGTH = 0x8, .USER_SECURE_APP_HASH = {0x7d58daf4, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000} Data in Start address: 0x00 0x00 0x01 0x30 0x7D 0x0C 0x00 0x10 I need support to resolve the issue at the earliest. Let me know if more details are neededMSPM33C321ASYSCONFIGhttps://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1693977/mspm0g1106-mspm0g1106-the-solder-balls-are-oxidizedFri, 30 Oct 2026 02:51:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:1bbe3251-dea2-4c8d-b41d-e8372a6861d6Suri ChenPart Number: MSPM0G1106 Hi Engineer, I purchased the part MSPM0G1106TYCJR with DC 255a. But I found the solder balls are oxidized and have spots. Will this affect soldering? Is this normal? TThanks, SuriMSPM0G1106https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1693494/mspm33c321a-q1-iar-with-jlink-issue/6525457Thu, 29 Oct 2026 20:12:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:251af992-e977-4398-ba8a-775f11de8d73JOJO ARTHURHello Sophie, Please open up a ticket with the Segger team regarding this since XDS110 has no issue. https://www.segger.com/support/technical-support/ Best Regards, Benedict Jojohttps://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1693494/mspm33c321a-q1-iar-with-jlink-issue/6525187Thu, 29 Oct 2026 16:02:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:1da312be-3e5c-4873-b28a-92b545910d15Sophie Chen(DLP)We have updated the patch. It's nothing to do with the IAR version. As we can debug successfully with XDS110.https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1693494/mspm33c321a-q1-iar-with-jlink-issue/6524970Thu, 29 Oct 2026 13:35:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:31043596-bc8d-4377-b157-906241640df5JOJO ARTHURHello Sophie, If they are using the IAR 9.70.4 version, they need to ensure they have the MSPM33 patch installed as stated on here: https://updates.iar.com/?product=BXARM However, the 10.10 is the recommended version as this fully supports the M33. Kindly let them know of this and verify if this rectifies the situation. Best Regards, Benedict Jojohttps://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1693805/msp430f449-recommended-8-mhz-clock-source-for-msp430f449Thu, 29 Oct 2026 12:39:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:d6c7cdf8-0da7-475c-b847-4ec5af1fe36fRyu YamashitaPart Number: MSP430F449 Other Parts Discussed in Thread: CDC6C Hi team, Background: We are looking for a recommended 8-MHz clock source for MSP430F449IPZ. The LFXT1 oscillator will be used in high-frequency mode (XTS_FLL = 1). Questions: Could you recommend an 8-MHz crystal or ceramic resonator suitable for MSP430F449IPZ? Alternatively, can TI's CDC6C 8-MHz LVCMOS BAW oscillator be connected to the XIN pin and used as the external clock source for MSP430F449IPZ with XTS_FLL = 1? If CDC6C can be used, are there any specific circuit or register settings required? Best Regards, Ryu.power deliveryMSP430F449CDC6Chttps://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1692626/msp430fr6043-reverse-voltage-on-uart-pins/6524889Thu, 29 Oct 2026 12:03:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:98cd57c3-9203-4c9c-9098-7055fda19c7fKeith BarkleyYou could put an opto-isolator between the Serial driver and the MCU and use the MCU VDD to drive the output transistor.https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1692626/msp430fr6043-reverse-voltage-on-uart-pins/6524884Thu, 29 Oct 2026 12:01:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:fcba6d40-7122-4f73-a06d-b75b7eff1f2bKeith BarkleyAs I stated before: "The only solution is to not have any voltage present when the MCU is to be powered off."https://e2e.ti.com/support/microcontrollers/msp-low-power-microcontrollers-group/msp430/f/msp-low-power-microcontroller-forum/1692626/msp430fr6043-reverse-voltage-on-uart-pins/6524744Thu, 29 Oct 2026 09:09:00 GMTcb01d8b2-d089-468d-babb-77d1d8683490:8c93185f-7654-4ec8-bb99-c6cb9abe8276ashok kok thanks.could you suggest any alternate solution for working on this please,