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INA303: Op Amp Buffer for Reference Voltage Input

February 25, 2019, 12:13 am
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Part Number:INA303

Hi,

I am looking into the circuit design of INA303. This part is very helpful for overcurrent protection with window comparator integration.

In INA303EVM design, the reference voltage divider is fed to REF pin with OPA313 buffer. The datasheet also tells that low-value resistor divider could also be used to eliminate the buffer stage. I am looking into the relationship between divider resistance values and output accuracy. Would there be any explicit requirements for the source impedance, i.e. the resistance of the voltage divider? 

Thanks for your help!

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TDA3: TDA2/TDA3 materials

February 25, 2019, 12:14 am
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Part Number:TDA3

Hello,

Is there TDA2X, TDA3x introduction and development process information, materials like PPT, especially focusing on the basic development process, my customer has been evaluating the test platform.

This matter is very important to customers, and it is also urgent, could sent to my email if available, thank you!

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CC1310: CC1310 Default whitening mode in Test Mode

February 25, 2019, 12:15 am
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Part Number:CC1310

Hi,

We would like to know what would be the whitening option selected by default in CC1310 in Test(CMD_TX_TEST) mode.

As per the details of "CMD_TX_TEST" in the user guide, the whitenMode has below 4 options.

0: No whitening
1: Default whitening
2: PRBS-15
3: PRBS-32

Is it "0: No whitening" or "1: Default whitening" option selected by default??


The "rfCarrierWave" example below mentions that "1: Default whitening" is selected by default.
dev.ti.com/.../index.html

And could you please let us know what value will be in "Default whitening" mode. Is it "-9"??
Couldn't understand the definition of Default whitening option in the user manual(23.3.3.1.8).

Best Regards
paddu

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DRV8873: Fault indication of ITRIP

February 25, 2019, 12:15 am
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Part Number:DRV8873

Hello,

Regarding the hardware version of the device(DRV8873H),
can we have a fault indication on the nFAULT pin when the current reached ITRIP level ?

Best regards,
itabi

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WEBENCH® Tools/UCC2813-4: How to select secondary FET instead of diode

February 25, 2019, 12:17 am
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Part Number:UCC2813-4

Tool/software: WEBENCH® Design Tools

Hi team,

Could you tell me how to select secondary FET instead of diode? As default, it looks WEBENCH generates only secondary diode(Dsec), we can't select FET.

Thank you for your support.

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IWR1642BOOST: What is "range" in "Point Cloud TLV"?

February 25, 2019, 12:17 am
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Part Number:IWR1642BOOST

In the traffic monitoring lab, the "point cloud TLV" returned by IWR 1642 has the following data.
- range
- azimuth
- doppler
- snr

Please answer the following two questions.

(1) Is "range" an "A"? Or is it "B"? (Please see the figure below)
(2) Please tell me the installation height "h" of "IWR 1642" when collecting sample data "fHistRT_0001.mat".
Approximate values ​​are acceptable as long as there is no information remaining.


<Intention of question>
I want to enable the 3D option function of GtrackLib.
Therefore, it is necessary to know the elevation angle "x" of the reflection point.
It can be calculated using 'A' or 'B', and 'h'.

Thank you.

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CCS/MSP430FR4133: Need to read the contents of RTCCNT from C++, how do I do this?

February 25, 2019, 12:20 am
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Part Number:MSP430FR4133

Tool/software: Code Composer Studio

Hi All,

I need to run some tests which requires the reading of the Real Time Clock count register, RTCCNT. How can I read this register from C++?

Thank you in advance.

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TMDS181: HDMI2.0 sink compliance impossible with intra- and inter-pair skew?

February 25, 2019, 12:14 am
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Part Number:TMDS181

Dear TI support team,

We would like to use the TMDS181 as HDMI2.0 sink buffer (directly after the HDMI connector). It seems like this is possible, because the front page of the datasheet says "The TMDS181x can be configured to support the HDMI2.0a standard."

However, this standard requires an HDMI connector to accept 0.15Tbit+112ps of intrapair skew (HDMI 2.0 standard, Table 6-7). The intrapair skew tolerance (tRX_INTRA) in the TMDS181x datasheet is only 112ps (no mention of 0.15Tbit). Of course, an input common-mode filter will suppress some intrapair skew, but it will never reduce it to zero. Moreover, the routing will always add some intrapair skew. How to achieve HDMI2.0 compliance, then? Is this a typo in the datasheet or am I missing something?

Similarly, the standard requires an HDMI connector to accept 0.2Tcharacter+1.78ns of interpair skew (HDMI 2.0 standard, Table 6-7). The interpair skew tolerance (tRX_INTER) in the TMDS181x datasheet is maximum 1.8ns (no mention of 0.2Tcharacter).  I would expect a 'tolerance' value to have a minimum and not a maximum value (in the current datasheet, the tolerance could also be 0, which is bad). I suppose this is a typesetting mistake.To my knowledge, there is no means of reducing interpair skew by routing (in general, it becomes worse). How to achieve HDMI2.0 compliance, then? Is this also a typo in the datasheet or am I missing something?

Please note I also submitted these questions both as datasheet feedback (no response) and as REQ0010878 and REQ0010876 (response: please post to E2E).

Thanks in advance for your feedback,
Sjoerd Op 't Land

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ADS1248: Never data ready

February 25, 2019, 12:16 am
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Part Number:ADS1248

Hello.

I'm using a pic24EP64GP206 to controll the adc over spi.

After some work and validation, spi seems work fine, but never getting a data ready from the adc, i just tryed all i getting nothing.

Here is a photo from my SPI (just sending 0xAA to make sure it's well configured)

And here is my code for configuration and data aquisition. (there is no CS signal in the code, but by hardware is fixed low)

void InicializaADC(){
    
    DELAYADC(10);   //Delay 10ns
    SPI1_send(0b00000110);    //Send reset
    DELAYADC(600);   //Delay 0.6ms
    //SPI1_send(0b00000000);    //Send WakeUp
    SPI1_send(0x16);    //Send SDATAC
    DELAYADC(600);   //Delay 0.6ms
    //SPI1_send(0b00010100);    //Send RDATAC
    
    //Send WREG
    
    SPI1_send(0x43);	//write to SYS0 to change SPS
    SPI1_send(0x00);
    SPI1_send(0x52);

    SPI1_send(0x42);    //write to MUX1 to set up internal reference
    SPI1_send(0x00);
    SPI1_send(0x30);
    
    SPI1_send(0x40);    //write to MUX0 register to change channels
    SPI1_send(0x00);
    SPI1_send(0x01);    //+AIN0, -AIN1
    //SPI1_send(0x13);  //+AIN2, -AIN3
    //SPI1_send(0x25);  //+AIN4, -AIN5
    //SPI1_send(0x37);  //+AIN6, -AIN7
    
    SPI1_send(0x04);    //Send SYNC
    SPI1_send(0x04);
    DELAYADC(2);   //Delay 6ms
    SPI1_send(0x14);    //Send RDATAC
}

ulong getADCSample(){
    FastTriggerSet(&timeoutADC,200000); //timeout 200ms
    
    while(DREADY_ADC){  //wait until data ready or timeout
        if( FastTriggerActivado(&timeoutADC) )
            return 99999;
    }
    DELAYADC(20);       //Delay tcssc
    
    SPI1_send(0x12);    //Send RDATA
    SPI1_send(0xFF);    //Send NOP x3
    SPI1_send(0xFF);
    SPI1_send(0xFF);
    

    
    DELAYADC(2);        //Delay tsccs

    return SPI1_recive();
}

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BQ27541: NRND

February 25, 2019, 12:20 am
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Part Number:BQ27541

Dear Texas Instruments,   

currently we are using the BQ27541 (NRND) and the BQ27541-V200 (NRND) battery fuel gauge in a medical product and we would like to understand how long the chip is still available on the marked.

Do we need to change immediately to the BQ27541-G1?

 

Thank you for your support!

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TCAN1043-Q1: Automotive Single Wire CAN Transceiver Solution

February 25, 2019, 12:23 am
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Part Number:TCAN1043-Q1

Hi team,

Could you please help to check if we have single wire CAN transceiver solution, like NCV7356/TH8056?

Thanks!

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TDA2PXEVM: Linking Problem in AlgPlugin creation

February 25, 2019, 12:24 am
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Part Number:TDA2PXEVM

I am creating algplugin on dsp2 which takes input from Sync and gives output to Dup . While creating I am getting linking issues in building. But when I put the same algplugin on dsp1 it is getting build correctly as well as object files are also created in binary. I am not able to understand what is getting wrong for dsp2.

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DLPDLCR2010EVM: An adapter for DLPDLCR2010EVM

February 25, 2019, 12:25 am
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Part Number:DLPDLCR2010EVM

I've gotten a DLPDLCR2010EVM but there was nothing to charge the device.

I saw the power of DLP2010EVM's input voltage is 5V.

Is it okay to charge the device by any adapter having 5V output voltage? Don't i need to care about output current?

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FDC2214: Am I wrong or this is mistake in datasheet ?

February 25, 2019, 12:28 am
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Part Number:FDC2214

Hi
According to FDC2214 datasheet - chapter 9.6.36 Address 0x7F, DEVICE_ID, this register (DEVICE_ID) is 8-bit (0:7) but it's value is 0x3054 or 0x3055. How is it possible? Shouldn't it have 16 bits ?

Such as this resgister, another one in this file (MANUFACTURER_ID) is just readable and has constant value too ( 0x5449 ).  MANUFACTURER_ID has 16 bits so it is reasonable but according to datasheet, DEVICE_ID must save 16 bits in just 8 bits !

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RTOS/CC3200: Does SimpleLink CC32xx SDK support CC3200 MCU

February 25, 2019, 12:30 am
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Part Number:CC3200

Tool/software: TI-RTOS

HI

   I'm new user for CC3200,  It seems SimpleLink CC32xx SDK Only support CC3220 and CC3235 , What SimpleLink version can Support CC3200 in CCS.

Kejian

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CCS/LAUNCHXL-CC1352R1: how can i measure voltage?

February 25, 2019, 12:33 am
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Part Number:LAUNCHXL-CC1352R1

Tool/software: Code Composer Studio

i want to measure voltage, so if voltage is low than 3.0v,  stop operating device.

how can i measure?

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TDP142: TDP142 in DP++ supporting

February 25, 2019, 12:35 am
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Part Number:TDP142

customer reported that he following the reference design as section 9.2.1 of datasheet for TDP142. the problem is that there is no HDMI in monitor after attaching DP to HDMI dongle behind TDP142.

Can you look at the issue?

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CCS/MSP430G2955: This issue rises when the existing firmware in CCS 5.4 Version has been created to CCS 7.4 Version

February 25, 2019, 12:36 am
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Part Number:MSP430G2955

Tool/software: Code Composer Studio

Dear Sir,

Due to availability of new debugger i.e, MSP-FET black Debugger

our existing firmware is CCS Ver 5.4 which was used by old white debugger i.e, MSP 430 USB-Debug-Interface is not supported by new debugger.

that's why Now i am trying make the project in CCS ver 7.4 with same files and all the setting are also same expect in CCS 5.4 Ver legacy OFF was there and in CCS 7.4 eabi (ELF) was there

rest all the other configuration are same but i am getting mention below error.

Description    Resource    Path    Location    Type
#10010 null: errors encountered during linking; "EM3 100A Calibration.out" not built    EM3 100A Calibration             C/C++ Problem
<a href="processors.wiki.ti.com/.../10099"> program will not fit into available memory.  placement with alignment fails for section ".text" size 0xe30e .  Available memory ranges:    lnk_msp430g2955.cmd    /EM3 100A Calibration    line 96    C/C++ Problem
gmake: *** [all] Error 2    EM3 100A Calibration             C/C++ Problem
gmake[1]: *** [EM3 100A Calibration.out] Error 1    EM3 100A Calibration             C/C++ Problem

please help me to solve this issue

Thanks and regards,

Vai

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Linux/DRA72: How to add new phy chip support in VSDK ?

February 25, 2019, 12:37 am
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Part Number:DRA72

Tool/software: Linux

Hi,experts,

We have a customer board, that used TJA1101 PHY which is the MII interface. 

How to modify the driver to support TJA1101 in VSDK ?

1. For linux, how to add TJA1101 support ?

2. NDK, how to add TJA1101 support 

Thanks, 

Widic

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Compiler/CC2640R2F: What's timing for scanning window/interval while scan for 1M and Coded at the same time.

February 25, 2019, 12:37 am
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Part Number:CC2640R2F

Tool/software: TI C/C++ Compiler

Hi All,

We use scanner for both 1M and Coded at the same time and find the throughput is bad.

        GapScan_setPhyParams(SCAN_PRIM_PHY_1M, SCAN_TYPE_ACTIVE,
                             DEFAULT_CONF_SCAN_INTERVAL,
                             DEFAULT_CONF_SCAN_INTERVAL);

        // Set Scan PHY parameters
        GapScan_setPhyParams(SCAN_PRIM_PHY_CODED, SCAN_TYPE_ACTIVE,
                             DEFAULT_CONF_SCAN_INTERVAL,
                             DEFAULT_CONF_SCAN_INTERVAL);

    temp8 = SCAN_PRIM_PHY_1M | SCAN_PRIM_PHY_CODED;

    GapScan_setParam(SCAN_PARAM_PRIM_PHYS, &temp8);

What's expected timing behavior while scanning 1M and CODED at the same time and what's possible cause of bad throughput.

BR,

Sam

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