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ADS1235: ADS1235

December 9, 2019, 11:01 pm
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Part Number: ADS1235

Hi

I have some additional questions to the thread of the ADS1235 (pin assign at Single-ended-input).
That means to use AIN1..5 as single-ended inputs I have to connect e.g. +2.5V (mid range voltage) on AIN0, why should I not connect GND (AVSS) to AIN0? If I create the +2.5V reference on AIN0 by a resistor divider between AVDD and AVSS, do I have the same issues as I use the internal Vcom as reference?
Converting a ground referenced 0..+5V signal on AIN1 with a +2.5V reference on AIN0 end up in positive/negative converted digital data, right?

Summarized, what is the best and easiest way to use AIN1..5 as ground referenced inputs (0..+5V)?

Best Regards
Oliver

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Product, tool & software alerts not working

December 9, 2019, 11:01 pm
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Hi,

Not shure if I'm right here with my problem. But I try anyway as no one from TI could help so far.

History:
Until December 2018 I got Email alerts from TI almost every week. Then receiving them stopped around the 2nd of December 2018. I was already in contact with EPIC and the local TI office because of this problem.
They changed something in my TI profile and then suddenly I received an Email alert at the March 31, 2019. But that was the last one I got so far. Since then lots of datasheets and other documents changed but I got no Email alert.

So the problem is still not solved. For us it is very important to get those information.

Any help on this is highly appreciated.

Thanks and best regards,

Patrick

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AM3354: Kernel hangs when USB is used

December 9, 2019, 11:02 pm
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Part Number: AM3354

Hi all.

We have RTSP server based on AM3354.

Linux kernel:  5.12, booting from nand. 

Build environment: Yocto, Poky Warrior.

Video source: webcam connected to usb (v4l2, python-gst-1.0)

Issue: after couple of hour (not predictible) linux get into freez state( cpu usage 0.0%, memory usage normal, no any logs, no any messages, all processes stucked), nothing can be done with os, just reboot left.

After weeks of searching and testing, we think it can be related with usb usage. When usb webcam is not used (fake videotestsrc from gestreamer) linux working properly and not hanging at all, rtsp server streaming stable. The same situation was with linux kernel 4.19, Yocto Poky Morty.

My question is, can someone look into my DTB file, especially in usb related part and maybe point me to some issue?
I am newbie in embedded linux.

Thanks.

  

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TMS320F280049: Flash security

December 9, 2019, 11:04 pm
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Part Number: TMS320F280049

I’m still not confident that I understood everything that is on the Technical Manual.

Our main requirement for security is relatively simple:

  1. Flash memory is protected against un-authorized readout
  2. We need to be able to “disable” security so that we can debug and step-through code when we need to debug issues

In the F2803x family, this was relatively easy:

  1. Write 0x0000 to CSM_RSVD locations (starting from 0x3F7F80)

 

  1. Write PASSWORD (128-bit) to CSM_PWL_P0 locations (starting from 0x3F7FF8)

 

  1. In the main() function, we “lock” the DSP by calling CsmLock() which is a function already defined in DSP2803x_SysCtrl.c.  If we want to debug, then we simply comment-out and not call CsmLock()

The info provided in SPRUI33C is quite detailed but unfortunately not very clear for me. 

Do you have a document that explains better the steps to enable security and also to disable it?  Maybe a code example will help.

I’m trying to be cautious here because I don’t want to lock the DSP and end up locking it forever.  We have a few board available but not a lot.

Regards Bernd

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TPS92601-Q1: TPS9260x Reference Schematic with SEPIC application

December 9, 2019, 11:07 pm
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Part Number: TPS92601-Q1

(This question was already asked here, but was either answered offline or not answered.)

I am also investigating a SEPIC solution for the TPS9201-Q1, and would be very interested in any reference schematic. For my particular use case, Vin = 9V to 38V, Vout = 30V, Iout = 1A (reduced with Vin < 18V).

I'd also love a sentence or two explaining the necessity of the second power diode in the SEPIC schematic in the part data sheet.

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PGA900: We are having problems with the PGA900.

December 9, 2019, 11:12 pm
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Part Number: PGA900

Hello friends!

Hi!

We are having problems with the PGA900. We can't connect OWI. All are doing everything according to the description, but no entrance to the interruption of OWI.

OWI initialization code:

...
//***********************OWI*****************************
   SET_B(DIG_IF_CTRL, OWI_ENABLE|OWI_DEGLITCH_FILTER_10MS);        //include OWI
   DLPWR = OWI_CLK_EN;
   WriteReg(OWI_INTERRUPT_ENABLE, OWI_INT_ENABLE);
   WriteReg(OWI_INTERRUPT, OWI_INTERRUPT_ACTIVE);
   WriteReg(COM_RX_INT_ENABLE,COMBUF_RXRDY_INT_ENABLE);
//***********************OWI*****************************
...
    WriteReg(IPR0, 0xC0C0C0C0);                   //enable interrupts (global)
    WriteReg(IPR1, 0xC0C0C0C0);
    WriteReg(ISER, 0xffffffff);
...

Code in OWI interrupt:

void OwiInterSv(void)
{
    WriteReg(OWI_INTERRUPT, OWI_INTERRUPT_ACTIVE);
    SET_B(DIG_IF_CTRL, OWI_ENABLE|OWI_TRANSCEIVER_ENABLE);                    //the OWI transceiver on

}

The food is served momentum as in the description, the waveform I enclose in the attachment. Don't understand where is the error.

Can you help?

Oscillogram on VDD

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Compiler/OPA657: regarding creation of phoodiode.

December 9, 2019, 11:12 pm
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Part Number: OPA657

Tool/software: TI C/C++ Compiler

Hi Guys

I need to achieve bandwidth of 200Mhz using S5973 PHOTODIODE AND OPA657 OPAMP in transimpedance circuit.im having a problem in creating a S5973 photodiode in simulation, could anyone can help on this. 

thanks 

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CCS/IWR1642BOOST: junk file

December 9, 2019, 11:18 pm
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Part Number: IWR1642BOOST

Tool/software: Code Composer Studio

Hi,

I am trying to parse the file that is parseTLV.py available in Ti forum.. So, to parse the python file I am reading the input bin file by using teraterm (DATA PORT). But I am not getting the original input file, it is providing me the junk file in hex format.

f8 3d ce 7d d9 41 3f fe 3c b8 59 be 3f fe 3c 4a
6f 44 3f 3f 26 44 42 bf 79 b0 ef 3f a7 f7 b4 bf
e6 b8 be 22 e9 ee 3f 0d 0a 20 20 20 20 20 20 20
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
41 20 20 20 20 20 20 20 20 30 40 bf c0 2f d0 3d
20 30 40 bf f1 aa 20 42 71 fb a3 3e c0 2f d0 3d
71 fb a3 3e d6 eb 6a 3f 0d 0a 20 20 20 20 20 20
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
20 20 20 20 20 20 20 20 20 6f db 53 ff ff ff ff
ff 42 0d 0a 20 20 20 20 20 20 20 20 d9 22 e9 da
3f 4e 61 49 0d 0a 0d 0a 20 20 20 20 20 20 20 20
20 20 20 20 20 20 20 20 3e e2 eb 48 64 e7 3f e4
cb bf fd 52 3f 26 42 3c 43 e2 da 3f 3b 6b bf fd
52 3f 54 63 c2 41 64 e7 3f 3b 6b bf fd 52 3f 6f
3f 43 e2 da 3f 0d 0a 20 20 20 20 20 20 20 20 20
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
20 20 20 20 bf fd 52 3f a7 2e f0 41 64 e7 3f 0d
0a 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20
20 20 20 20 20 20 20 20 20 bf fd 52 3f c1 fe bc
43 e6 f3 3f 0d 0a 20 20 20 bf fd 52 3f aa ff df
41 e2 da 3f d1 53 fb be fd 52 3f c9 42 23 e1 3f 

Can anyone help me to resolve this issue??

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AM3358: UART0 output

December 9, 2019, 11:20 pm
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Part Number: AM3358

Hi,

The customer designed two boards, one is AM3358 and the other is AM3352.

But the output of AM3358 UART0 is garbled like the below screenshot. The uart should output cccc normally. 

Snap1.jpg (464×305)

Snap5.jpg (656×270)

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AM5728: video-graphics-test example

December 9, 2019, 11:21 pm
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Part Number: AM5728

Hi 

We are working on a beagleBoard x15  around AM5728 (based on processor sdk 06.01)

video-graphics-test example not work on beagleboard x15.

The program runs without errors. But there is no camera image on the screen. Checking the program shows that the following code is not working properly.

//Secure DSS hardware planes for overlay from QT QPA
for(uint32_t i = 0; i < m_num_planes; i++){
    m_plane_id[i] = m_qpa_ctl->m_create_plane(m_screen);
}

The return plan number is 4294967295. That doesn't look like an correct number.

Would you please shed some light on why this does not work?

Any help would greatly be appreciated.

Kind regards,

Esmaill

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ADS1120: input signal is 0V，output value is not 0（ADC result is 1300）.

December 9, 2019, 11:19 pm
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Part Number: ADS1120

1. reg configre : uiADS1120_WrBuff[4] = { 0x08, 0xC1, 0xC5, 0x80};  circuit is figure 79 in datasheet.

2. my code as follow:

int ADS1220ReadData(void)//TFQ改
{
   int Data;
   u8 TempData;
   /* assert CS to start transfer */
   ADS1220AssertCS(1);
   Delay_us(20);        //  之前是10us
   /* send the command byte */
   TempData = SPI2_ReadWriteByte(ADS1220_CMD_RDATA);
   /* get the conversion result */
    // ADS1120
   Data = SPI2_ReadWriteByte(0xff);
   Data = (Data << 8) | SPI2_ReadWriteByte(0xff);
   /* sign extend data */
   if (Data & 0x8000)
      Data |= 0xffff0000;
   Delay_us(20);                //houjia
   /* de-assert CS */
   ADS1220AssertCS(0);
   return Data;
}

3. read reg value  is  equal write value. but,when i modified the reg0 0xe8, the adcputput is not near zero, it's a 1300.

connect sensor, the ADC value is 2103, when change the sensor state, the adc value is changed .it looks like plus a offset in the input port.

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TCA9539: TCA1116 broken link / Datasheet

December 9, 2019, 11:30 pm
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Part Number: TCA9539

Hi all

My customer finds no information on ti.com for theTCA1116, the link is broken.

Can you provide the full Datasheet and reestablish the product landing page ?

Referring to another post I see the TCA9539 is pin-compatible, nevertheless we should document theTCA1116 as well on the Web.

Best regards

Ueli

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BOOSTXL-DRV8323RS: Need a solution

December 9, 2019, 11:32 pm
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Part Number: BOOSTXL-DRV8323RS

Hello Team TI,

Here am attaching DRV8323RS Schematic,

i have some doubts about VM and VDrain.

(If i give 12 V for VM for DRV823RS power supply and VDrain voltage is upto 52V,  and what is the status voltage of input gate drive GHx,SHx,GLx)

Pls some one explain it.

and any one have schematic for above one.

Thanks,

Suman Subburaj

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CCS/AWR1642: a data verification erro occoured

December 9, 2019, 11:36 pm
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Part Number: AWR1642

Tool/software: Code Composer Studio

Load Program Failed:

 E/ti/workplace/vitalsigns_16xx_dss.xe674:a data verification erro occoured

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CC3220MODA: Hardware review

December 9, 2019, 11:38 pm
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Part Number: CC3220MODA

Hi Technical team,

We have designed a PCB for indoor asset tracking applications using Wi-Fi technology CC3220MOSASF12MONR module.

I have attached gerber file, schematic and layout file in pdf,

The product uses wifi module and battery for its operation,

Battery being used is 3.6V/1.2Ah Lithium battery(LiSOCL2)

For providing reverse voltage protection, selected "CSD25310Q2"

For getting a motion change of the device used "LIS2DW12TR"

for programming UART is given.

Please review the design .

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What's the difference between SoC TDA2P-ABZ and TDA2SX?

December 9, 2019, 11:38 pm
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Hi,

     I want to get the difference between SoC TDA2P-ABZ and TDA2SX, now  I get a excel comparation doc. from link: http://www.ti.com/solution/surround-view-system-ecu.   You can refer to the attachment. from this gernerated excel, there is no "co-processor(s)" and “DRAM” data, but when I refer to the TDA2P-ABZ datasheet, I find dual co-processers in TDA2P-ABZ, so I want the true difference between them!

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LM76003: LM76003 quiescent current is too big in light load mode

December 9, 2019, 11:45 pm
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Part Number: LM76003

Hi

Customer feedback the quiescent current is too big in light load mode.

 Vin: 12V, current:17mA

Vout: 5V, loading is 5V/4mA

Switching frequency is 2,1MHz

As we can see from below curve, the efficiency is around 85% in 12Vin/5Vout/4mA condition.

5Vout*4mA=0.002W/85%=0.023W_pin/12Vin=0.0019A (1.9mA) but customer get 17mA on Vin.

so that is make sense?


 

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TS5A23166: Isolation in Powered-Down Mode

December 9, 2019, 11:46 pm
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Part Number: TS5A23166

Dear Technical Support Team,

TS5A23116 has a Isolation in Powered-Down Mode(V+=0) and following E2E post shows the detail of isolation related to the leak spec.

So TS5A23116  can input the signal to NO1ⅴNO2 during V+=0.

https://e2e.ti.com/support/switches-multiplexers/f/388/p/835338/3094933?tisearch=e2e-sitesearch&keymatch=yuyama#3094933

Is there any specification about ramp up time(like Δt/ΔＶof logic device(ioff) ) of supplying voltage to keep Hi-z.

Then I think IN1/IN2 should be L (OFF) to keep Hi-z.

Best Regards,

ttd

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ESD224: HDMI cable specification

December 9, 2019, 11:47 pm
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Part Number: ESD224

Hi,

Datasheet of ESD224 HDMI 2.0 Compliance and Protection used HDMI cable, but i did not find information about for this cable.

What is the specification (cable length, impedance etc.) of this cable?

Thanks.

(Please visit the site to view this file)

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CC3220SF-LAUNCHXL: Can't update(burn) firmware through JTAG_IN

December 9, 2019, 11:49 pm
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Part Number: CC3220SF-LAUNCHXL

Hi,

I want to burn the firmware of CC3220SF_LAUNCHXL through JTAG_IN.

I remove the J3 jumpers including RST, TMS, TCK, TDI and TDO for CC3220SF_LAUNCHXL

And take another TI LaunchPad (CC1310_LAUNCHXL) and configure it as XDS110-Base JTAG emulator (by removing all the jumpers on it).

and connect the "XDS110_OUT" of CC1310_LAUNCHXL and the "JTAG_IN" of  CC3220SF_LAUNCHXL.

I plug USB power into the CC1310_LAUNCHXL and I want to burn the firmware of CC3220SF_LAUNCHXL by UniFlash tool.

Why the auto detected devices is CC1310 but not CC3220SF.

What should I do?

And is there any problem for my jumpers setting (refer to the following figure)?

Yellow frame: Jumpers not populated. (removed)

Blue frame: Jumpers populated.

thanks.

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