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CC1310: Detect missing of 24MHz crystal

December 10, 2019, 12:27 am
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Part Number: CC1310

I have a cc1310 in production: during assembly, there were a few assembly fails (a few failed boards out of a big number of success boards) which the 24MHz crystal was missing and not installed on the PCB. Strangely, the AOI didn't catch the mistake and the board continued its way to the factory flashing/testing procedure.

Is there a way in software to detect that the 24MHz crystal is missing? The M3 side was fully operational so the factory test test didn't detect anything abnormal. It's only in the hands of the customer that the product was detected as failure because it was not transmitting anything.

I see that there is a sysreset flag about the clock loss but it didn't raise up any red flag during my factory testing procedure. My point here is to get another layer of software that can validate the hardware assembly.

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TPS61088: TPS61088 is burn out very easy even no load

December 10, 2019, 12:27 am
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Part Number: TPS61088

Hi team,

customer use TPS61088 in battery applicaiton, the schematic as below:

Image may be NSFW.
Clik here to view.

1. The issue is when the power up, turn on G2, the TPS61088 will be burn out, measure the pin4~pin7, all short to ground. This problem sometimes happen and sometime not.

2. TPS61088 also very burn out nomatter connect load or not.

could you help review this schematic and give your comments, thank you.

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IWR6843ISK: Unable to connect to Demo Visualizer using IWR6843ISK

December 10, 2019, 12:28 am
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Part Number: IWR6843ISK

Hi there,

i am unable to connect my IWR6843ISK to the demo visualizer. I am able to run the IWR6843ISK traffic monitoring labs and i am able to use uniflash to flash the metadata into the IWR6843ISK to do the traffic monitoring demo using the GUI application. During the setup of the IWR6843ISK i have correctly using the correct serial port. But whenever i press "send config to the mmwave device" it will show that com port 10 is "waiting for data". I am hoping if someone could provide me some directions on how should i go about troubleshooting. I have tried many stuff and so far i can't seem to breakthrough this problem. 

Some questions i have back in my mind are:
May i know when using the demo visualizer, do i need to short my SOP2 pin in "flashing" or "operational" mode? 

Do i need to flash any configuration file into the device using uniflash? 

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LM3880: Some LM3880 works abnormally

December 10, 2019, 12:31 am
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Part Number: LM3880

Hello,

    We made about 80 boards, using the LM3880 to control the power-on sequence. The circuit of the LM3880 is as follows. The input power of the board is VCC_5V.

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One board out of these boards cannot be powered up in the chassis.  We find that FLAG1 of the LM3880 on this board hold low,  FLAG2 and FLAG3 hold high. So the power controlled by FLAG1 cannot be powered up.

We find that when there are less than five boards in the chassis, this board can be powered up. When there are five boards in the chassis, this board cannot be powered up.

When there are five boards in the chassis, we tested the voltage of the power supply. The voltage of the power supply is about 5V. The voltage is normal.

We tested the power-on startup waveform of the power supply. When there is one board in the chassis, startup waveform of the power supply is as follows.

Image may be NSFW.
Clik here to view.

When there are five boards in the chassis, startup waveform of the power supply is as follows.

Image may be NSFW.
Clik here to view.

We can find that when there are five boards in the chassis, temporary voltage drop during power on.  

is the voltage drop during power on the reason why LM3880 works abnormally?

Best Regards,

Lin

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CCS/TMS570LS3137: #10099-D program will not fit into available memory. placement with alignment fails for section ".cinit" size 0x2f (CAN bus bootloader)

December 10, 2019, 12:31 am
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Part Number: TMS570LS3137

Tool/software: Code Composer Studio

I going to upload firmware on tms570ls3137 over CAN, using "CAN Bus Bootloader". According to (SPNA241) "CAN Bus Bootloader for Hercules™ Microcontrollers" the following settings must be made for the linker.

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The settings for my board are identical. But after build I get "Failed memory allocatioins".

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I tried to combine FLASH_CODE and FLASH0 into one.
FLASH_CODE (RX) : origin=0x00010040 length=0x1EFFC0 fill=0xFFFFFFFF
Evrything is fit, but I get another error - "failed to read null: failed to read"

How I can fix that issue?

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TPS5xxxxx

December 10, 2019, 12:33 am
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(Please visit the site to view this file)(Please visit the site to view this file)

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DRV8323: failure analysis for stuck FET

December 10, 2019, 12:42 am
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Part Number: DRV8323

Did you analyze the probability and impact (in the component FMEA, etc.) of the failure mode of a stuck MOSFET gate signal, even when the DRV input is still driven by PWM signals from the SW.

In the datasheet the following statement is given:

“The third component of the TDRIVE state machine implements a scheme for gate fault detection to detect pin-to pin solder defects, a MOSFET gate failure, or stuck-high or stuck-low voltage condition on a MOSFET gate”.

Is there any certain design in the DRV which avoid a impact of a certain DRV failure (stuck output) into this kind of monitoring function (independency between theses features / functions)?

What is the argumentation to detect a stuck output (caused by internal failure) within the DRV mechanism…?

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TPS546C23: Data Logging Error when monitoring with fusion digital Power Designer

December 10, 2019, 12:44 am
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Part Number: TPS546C23

Hi,

I am currently having some issues when i try to log the data from my TPS546C23 with fusion digital power designer. When i start the data logging to register to a file, i have that error message, and i can't do anything about it. I think the automatically generated name have a problem with / and \.

I am using the latest version available on your website  of fusion digital power designer (7.1.1).

Regards,

Yohann

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TIDM-FRAM-IRREFLECTIONSENSING: too much board to board variation in ADC output for standby.

December 10, 2019, 12:48 am
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Part Number: TIDM-FRAM-IRREFLECTIONSENSING

Hi TI Team,

We used the reference design for our product with everything the same in hardware and firmware.  

But, we are getting  too board variation in  ADC output. 

Example: light average reading will flactuate too much in other boards.

Any suggestion?

Regards,

Walter

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CC2640R2F: SNV question

December 10, 2019, 12:49 am
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Part Number: CC2640R2F

Hi,

I read the flash secter of CC2640R2F user's guide[http://dev.ti.com/tirex/explore/content/simplelink_cc2640r2_sdk_3_30_00_20/docs/blestack/ble_user_guide/html/ble-stack-common/flash_memory-cc2640.html#using-simple-nv] , but i still have some confusion.

As the link above said: The Simple NV (SNV) area of flash is used for storing persistent data, such as encryption keys from bonding or to store custom defined parameters. The protocol stack can be configured to reserve up to two 4 kB flash pages for SNV, although valid data is only stored in one active flash page. To minimize the number of erase cycles on the flash, the SNV manager performs compaction on the flash sector (or sectors) when the sector has 80% invalidated data. A compaction is the copying of valid data to a temporary area followed by an erase of the sector where the data was previously stored. Depending on the OSAL_SNV value as described in OSAL_SNV Values, this valid data is then either placed back in the newly erased sector or remains in a new sector. The number of flash sectors allocated to SNV can be configured by setting the OSAL_SNV preprocessor symbol in the stack project. Table 9. lists the valid values that can be configured as well as the corresponding trade-offs.

Does that means if one writes to the same NV Item multiple times and achieve 80% of the first page, SNV manager will compact and store the data to the second page[if OSAL_SNV =2], and release the first page to storage.

1.If do this enough times, the second page will eventually full, what will happen then? 

2.Only the first page can be compacted or both page can?

3." Although valid data is only stored in one active flash page. " Does that means we can not write to both page via SNV APIs, The only way is to use two NV Items?

BR,

Viki

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LM5069: Minimum Input Operating Voltage

December 10, 2019, 12:52 am
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Part Number: LM5069

Hi team,

We've got a new hot swap design that input voltage range is 9V to 36V, but worry about the min. input voltage condition as the product spec is 9V (+-5%) and the min. system voltage must be no less than 10V in calculation spreadsheet.

Could you please comment if LM5069 is suitable for the design? Thanks!

Best regards,
Sam Ting

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BQ76940: bq76940 12s configuration

December 10, 2019, 12:52 am
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Part Number: BQ76940

hi,

We have designed a 12s BMS with bq76940 and bq78350-R1 .

but readings values are not correct. Voltage of three cells at the lowest level is read true but the rest of the cell voltages can not be read.

can you give advices for this design?

best regards,

Serdar Özbek

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Compiler/ADS1263EVM-PDK: How decided Data Acquired sizes(each ADC1 and ADC2) ?

December 10, 2019, 12:55 am
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Part Number: ADS1263EVM-PDK

Tool/software: TI C/C++ Compiler

Hello.

I use sbac160(LabVIEW source code). I know how I can get Data Size of only ADC1 Data.((Decided block size by # of samples) * 128 or 126 byte data per # of Samples)

However, in case of "Capture ADC2 Data?" is ON, I don't know follow of pattern of Data sizes of ADC1 and ADC2.

(e.x. in case of # of samples:100, Capture ADC2 Data?:ON, Register Map:Mode2:20sps, Register Map:AD2CFG:10sps is that ADC1 Data Size is 228, ADC2  Data Size is 113)

Could you tell me in case of "Capture ADC2 Data?" is ON that ADC1 and Adc2 Data Sizes follow of pattern?

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LPV511: High Side Current Sensing Implimentation

December 10, 2019, 1:00 am
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Part Number: LPV511

Hi,

We have selected LPV511 OP-AMP for High Side Current Sensing . We require the following confirmation before proceeding,

1.Is the resistor R3 Internal/External to the IC? I assume as per the datasheet it is internal and has a fixed value of 10K which cannot be varied by the designer. Please confirm!

2.There is no need for a feedback resistor and we require only 3 resistors R1,R2 and R3 for proper current sensing as per the application circuit.

3. What is the min and max gain that we can configure with LPV511?

4.Can we configure gain for 1.366 when R3=10K and R2 = R1=7.32k and Gain of 50 when R3=10k and R1=R2=200E?

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PROCESSOR-SDK-AM335X: Linux/PROCESSOR-SDK-AM335X: PRUSS_ETH Single MAC Problem

December 10, 2019, 1:03 am
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Part Number: PROCESSOR-SDK-AM335X

Hello,

our company has designed a custom board with the TI AM335x and two ethernet ports. One is connected to MII1 and the other should use the PRU and ist connected to PR1_MII1. The first port works like expected but the PRU Eth Port is not working.

We did a lot of testing and to me, it seems like a bug in the prueth driver.

After the driver is initialized we get an Error:

[ 15.044651] prueth pruss_eth: TI PRU ethernet (type 0) driver initialized

...

[ 27.001215] Unable to handle kernel NULL pointer dereference at virtual address 000000f0
[ 27.038019] pgd = 4f4314a1
[ 27.040761] [000000f0] *pgd=00000000
[ 27.083212] Internal error: Oops: 805 [#1] PREEMPT ARM

For further information, I attached a log file and the device tree we use.

Additional Info: We are using the ti-processor-sdk-linux-rt-am335x-EVM-06.01.00.08 with a 4.19. Linux RT kernel and the filesystem is tisdk-docker-rootfs-image-am335x-EVM,  both provided by the SDK.

Thank you very much in advance for your answer.

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LSF0204-Q1: layout guideline

December 10, 2019, 1:03 am
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Part Number: LSF0204-Q1

Hi,

In LSF0204-Q1  datsheet, it is recommonded that Placing the LSF0204-Q1 device near the high voltage side . So what's the reason for this layout requirement?

If there are more than one device on the high voltage side, how to place LSF0204-Q1?

Thank you.

Best Regards.

Gavin.

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CC2642R: ANCS example code for CC2642R

December 10, 2019, 1:04 am
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Part Number: CC2642R

Hi,

My customer is looking for ANCS example code for developing CC2642R.

Please help to check if TI has example code for ANCS and provided download link.

Thanks.

Mike

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TDC7201-ZAX-EVM: TDC7201-ZAX-EVM

December 10, 2019, 1:05 am
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Part Number: TDC7201-ZAX-EVM

We are developing and test a LIDAR system using MSP-EXP430F5529LP with TDC7201-ZAX-EVM and I've seen that the executable was built in LabView environment. Is it possible to provide the source vi for us to further develop our code, please?

Best regards,

Dr. Martins

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TPS53626: TPS53626 VFB Dual Phase

December 10, 2019, 1:06 am
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Part Number: TPS53626

Hi Team,

We've DIN TPS53626 in our customer, but they met dual pulse issue when doing frequency test of P1V2_VDDQ(connect to VFB pin), please refer to the waveform below, I can send you the schematic through email.

Image may be NSFW.
Clik here to view.

Test condition: 4A load, connect to CPU(without memory)

We’ve tried to decrease the output resistance, but cannot lead to a better situation.

 

Our customer also use this part for other CPU power, but they didn’t observe same phenomenon. Could you please give some comments on what may be the issue cause?

Thanks.

Best Regards,

Livia

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TPS61040: LED Application with load disconnect

December 10, 2019, 1:06 am
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