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DS90UH947-Q1: There is no signal on the LF pin of ds90uh947.

Part Number: DS90UH947-Q1

I am developing using ds90uh947 and ds90uh948.
The LF pin of the ds90uh947 is "FPD-Link III Loop Filter", which connects 10nF to GND. The oscilloscope is supposed to show the signal, but I can't see any signal. How many volts should a signal be normal?


TCA9543A: Power on the I2C but not on Vcc

Part Number: TCA9543A

Hello, 

A customer of mine asks what is the consequences if they have power in I2C bus but not on the TCA9543A?

We didn't manage to find it out from the datasheet.

I noted in a thread that it might be issues knowing the states of the I2C pins if Vcc not ramped properly, I suppose that is valid in this case as well?

Best regards

Jorgen

UCC28070: The AC current will be unstable during very short time.

Part Number: UCC28070

In the evaluation of this device, when the AC input voltage is changing, the AC current will be unstable during very short time.

This behavior is due to that the AC voltage is reaching to threshold of the linear multiplier as showed on datasheet 7.3.10.

However, even though the AC voltage is held on this point, the AC current will be stable soon.

Can you respond to the following questions?

1. Why the AC current will be stable soon in this case? Is this due to feedback?

2. Is there a possibility to keep the AC current will unstable?

3. When the AC current will be unstable, is there any problem for the PFC working? (for example, the power factor will be bad)

TMS320C6678: Hyperlink SerDes interface doesn't have the status set ok after CFGPLL set

Part Number: TMS320C6678

Hi,

   I'm using 2 EVM c6678 boards (TMDXEVM6678L EVM) and after applying the settings for SerDes initialization exactly like in your example I do not have the LINK bit from Status Register set, meaning the SerDes was not initialized successfully.

   The value of STS_REG is 0x4, meaning SPEND bit is set. I used the Lock/Unlock Kicker when set CFGPLL and SERDES_CFGTXn/SERDES_CFGRXn registers.

   Can you tell me what means exactly: "Pending slave requests. Indicates that a request has been detected on the Tx VBUSM slave interface" considering my hyperlink is just after board power-up?

Thank you.

Derleyici / LAUNCHXL-CC26X2R1: workspace_v9_2

Part Number: LAUNCHXL-CC26X2R1

Tool/software: TI C/C++ Compiler

hello;

I'm first time using TI ARM systems so this is the new experience.

I have some errors like photo I coudnt find any fix solution.. please  can you help me?

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TLV320AIC3110 help

Part Number: TLV320AIC3110

I am trying to run TLV320AIC3110 on my board with STM32F7 on board

In the debugger, I see that all the registers were successfully written to TLV320AIC3110 during initialization

Data is visible on the oscilloscope, but TLV320AIC3110 is silent


Here is my code:

void Application::Init() {

	BoardSupportPackage::Init();

	auto audio = TLV320AIC3110(Peripheral::hi2c1);
	audio.CodecReset();
	audio.SetFrequenciesSetting(48000);
	audio.ConfigureAudio();
	audio.ConfigureMic();
	audio.AudioVolumeControl(30);
	audio.CodecUnmute();
	audio.CodecMute();


    int16 signal[46876];
    int nsamples = sizeof(signal) / sizeof(signal[0]);

    int i = 0;
    while(i < nsamples) {
        double t = ((double)i / 2.0) / (double)nsamples;
        signal[i] = 32767 * sin(100.0 * (2.0 * 3.14159265358979323846) * t); // left
        signal[i + 1] = signal[i]; // right
        i += 2;
    }

    while(1) {
        auto res = HAL_SAI_Transmit(&Peripheral::hsai_BlockA2, (uint8*)signal, nsamples, HAL_MAX_DELAY);
        if(res != HAL_OK) {
            Peripheral::CriticalError();
        }
    }
}

STM32 SAI HAL:

	hsai_BlockA2.Instance = 					SAI2_Block_A;
	hsai_BlockA2.Init.Protocol = 				SAI_FREE_PROTOCOL;
	hsai_BlockA2.Init.AudioMode = 				SAI_MODEMASTER_TX;
	hsai_BlockA2.Init.DataSize = 				SAI_DATASIZE_16; // --
	hsai_BlockA2.Init.FirstBit = 				SAI_FIRSTBIT_MSB;
	hsai_BlockA2.Init.ClockStrobing = 			SAI_CLOCKSTROBING_FALLINGEDGE;
	hsai_BlockA2.Init.Synchro = 				SAI_ASYNCHRONOUS;
	hsai_BlockA2.Init.OutputDrive = 			SAI_OUTPUTDRIVE_ENABLE;
	hsai_BlockA2.Init.NoDivider =				SAI_MASTERDIVIDER_ENABLE;
	hsai_BlockA2.Init.FIFOThreshold = 			SAI_FIFOTHRESHOLD_1QF;
	hsai_BlockA2.Init.AudioFrequency = 			SAI_AUDIO_FREQUENCY_48K;
	hsai_BlockA2.Init.SynchroExt = 				SAI_SYNCEXT_DISABLE;
	hsai_BlockA2.Init.MonoStereoMode = 			SAI_STEREOMODE;
	hsai_BlockA2.Init.CompandingMode = 			SAI_NOCOMPANDING;
	hsai_BlockA2.Init.TriState = 				SAI_OUTPUT_NOTRELEASED;

	hsai_BlockA2.FrameInit.FrameLength = 		64; // --
	hsai_BlockA2.FrameInit.ActiveFrameLength = 	32;  // --
	hsai_BlockA2.FrameInit.FSDefinition = 		SAI_FS_CHANNEL_IDENTIFICATION; // --
	hsai_BlockA2.FrameInit.FSPolarity = 		SAI_FS_ACTIVE_LOW; // --
	hsai_BlockA2.FrameInit.FSOffset = 			SAI_FS_BEFOREFIRSTBIT; // --

	hsai_BlockA2.SlotInit.FirstBitOffset = 		0;
	hsai_BlockA2.SlotInit.SlotSize = 			SAI_SLOTSIZE_DATASIZE;
	hsai_BlockA2.SlotInit.SlotNumber = 			2;
	hsai_BlockA2.SlotInit.SlotActive = 			SAI_SLOTACTIVE_0 | SAI_SLOTACTIVE_1;

My scheme:

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The library that I rewrote from the Linux driver:

hastebin.com/azigubikom.cpp

hastebin.com/etirorahib.cpp

WEBENCH® Tools/LM5140-Q1: LM5140-Q1

Part Number: LM5140-Q1

Tool/software: WEBENCH® Design Tools

Hi,

Would you please provide the average pspice model of LM5140-Q1, which I can't find on TI's Web.

Beside, I wonder whether the value and ESR of output capacitor will affect the loop response such as phase margin.

 Would you please  provide some docs to analyze the effects of value and ESR of output capacitor?

Thanks anyway!

Kevin Shen

TMS320F28377S: Best board to develope the code for F28377S

Part Number: TMS320F28377S

Hi,

My customer is finding the best board to develope their code for F28377S.

Which board is the best?

Can the customer use LAUNCHXL-F28379D?  If so, what is the point which the customer have to care as developing the code, which is appied for 377S, on the launch pad?

Best Regards, Taki


OPT9221: dealias_16bit_op_enable configuration

Part Number: OPT9221

Hello,

I am trying to use the 16-bit mode of the phase data to avoid using the mask to only have 12 bits and to lose MSBs or LSBs as described in section 7.3.7.2.5 in the OPT9221 datasheet.

But when setting the dealias_16bit_op_enable bit to '1', I don't see any impact on my phase data so I am wondering if there is a special configuration instead of just this dealias_16bit_op_enable bit to get 16 bits of phase image. Like any special order in the configuration or if for instance dealiased_ph_mask field should be set to 0 or something else.

I tried both ways to either configure this mode at start-up or in live but didn't see any impact.

Regarding my configuration, I am well using the 4-byte mode for pixel_data_size and I am using a dealiasing configuration where I have frequencies of 72 and 96 MHz with MA = 3, MB = 4, KA = 3 and KB = 2 with 1 subframe, 6 quads and running at 60 fps.

Thank you in advance,

Corentin

ps: we use firmware v31 of the OPT9221

LAUNCHXL-CC1312R1: ti15.4stack/cc1312R1:on_chip oad failed

Part Number: LAUNCHXL-CC1312R1

hi, ti engineers

I occasionally fail in running cc1312r1 on_chip example.The OAD Retries number of times OAD_MAX_RETRIES is achieve during the oad process, oad is terminated, and the device can not communicate, and the log cannot be printed.

hope for your reply, thanks.

TIDA-01558: Changes to support 12V lead-acid battery and 24V Vbus

Part Number: TIDA-01558

Hello:

I'm looking into the following battery-backup reference design.  However, for our application we need to support a 12V battery with a 24V Vbus / boost supply output. 

I need some help in verifying that the following changes are basically what is needed.  If TI can provide any guidance or help, that would be greatly appreciated.

  • Modify TPS43060 output resistor FB network (for 24V)
  • Modify the ULVO (EN pin) based on the 12V battery input.
  • Modify transitioning circuits between boost (discharging) and buck converter (charge). 
  • Modify the buck converter voltage to support charging the 12V battery.
  • Modify CC-CV circuit based on 12V battery votlage.

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SN74LVC1T45: 50ohm level shifter

Part Number: SN74LVC1T45

Hello,

My goal is to to translate 2.5V logic level (from MAX10 FPGA) to 1.8V logic, driving a 50ohm load.

It means that I need a device capable of driving 1.8V/50ohm=36mA.

I didn't find any device capable to drive such current, so my question is:

1. Can you recommend about a device like this?

2. do you recommend using few devices (or one dual/quad..) by connected inputs and outputs in parallel, to increase drive capability? (As mentioned in https://e2e.ti.com/support/logic/f/151/t/437301?Suggested-Logic-Buffer-for-driving-TTL-50-ohm-load)

3. Is it possible to use a Clock buffer (like LMK00804B-Q1), which seems to be capable of driving 50ohm loads?

Thanks!

Max

ADS1293EVM: Driver Installation Problems

Part Number: ADS1293EVM

Hi

I have tried all the suggested solutions in order to install the ADS1293EVM onto both Win 7 and Win 10. Non seem to work !!!

For Win 7, I downloaded the software from the TI website, installed it, and when I tried to update the drivers through the device manager, I keep getting the same error message. 

"Windows encountered a problem when installing the driver software for your device"

For Win 10, I tried to Disable Device signing in Windows 10 to start with, then followed the above steps and still get the same error message as before> 

"Windows encountered a problem when installing the driver software for your device"

Can someone please suggest: 

1 - A way to install this on either machine (ideally win 10) 

2 - tell me where I can find the driver files so that I can install them from a file rather than having the device manager trying to connect to the website online. 

Thank you 

Arash 

TMS320F28335: How to get PCB and schematic cadence files of TMS320F28335?

Part Number: TMS320F28335

Hi team,

I am looking for PCB and schematic file for Cadence.

For 28335, I noticed we only provided .stp file for LQFP package which cannot be opened by ultra library. Could you help to tell how to get these files?

Regards,

Brian

AWR1243: TIDEP-01012: MMWCAS-RV-EVM & MMWCAS-DSP-EVM (ordering)

Part Number: AWR1243

Hello everyone,

I have a question regarding the field of view of the TIDEP-01012. In the design guide it is mentioned that it has a FOV of +/-70° with an (azimuth) angular resolution of approximate 1.4°. I also read that the elevation angle can have a resolution of 18° (MIMO). However, nowhere is mentioned what the actual FOV in elevation is.

Does anyone know where in the specification I can find this information or performed some investigations and can share with me the outcome?

Thank you very much.

Best,

Andreas


CC1352P: Programming a fresh CC1352P1 MCU on custom hardware

Part Number: CC1352P

Hi Support,

I am designing a custom board that uses the CC1352P1 chip, and need help with the below questions:

1) Will exposing UART and JTAG interfaces be sufficient to program and recover the MCU in the event of any flash/image corruption, including switching it from Production mode to Development?
2) Can I program the MCU via both UART and JTAG using Code Composer Studio and/or TI's Uniflash tool?
3) What are the default pin configurations for a fresh MCU for communicating via UART? Is it as per the "Serial Bootloader Interface" document - SWRA466B, i.e. RX -> DIO_12 and TX -> DIO_13?
4) Can I always rely on the Bootloader being available in ROM (employing the backdoor if necessary) should things go wrong in one way or the other when programming the MCU.

Thanks.

DS90UB933-Q1: HSYNC and VSYNC width

Part Number: DS90UB933-Q1

Hello Team

Does DS90UB933 requirement for the minimum high width for  HSYNC and VSYNC? for examle, 1 PCLK or  2PCLK?

LP5907: Spur at Cold Temperature

Part Number: LP5907

Hi Expert,

We observe ~35dBc spur at +/-4Mhz offset under -35degC. We tried to touch the chip with hand, the spurs would disappear. In addition, we also found if adding another Cout=4.7uF, the spur would disappear too.

Could you please clarify is it related to the temperature or output cap in terms of stability?

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Thanks.

Allan

BQ34Z100-G1: BQ34Z100-G1, Hall sensor

Part Number: BQ34Z100-G1

I would like to know, if it is possible to measure current with bq34z100-G1 IC using hall sensor instead of shunt resisitor for high current applications.

C64XPLUSCODECS: MP3 decoder does not decode mp3 files with bitrate lower than 64kbps

Part Number: C64XPLUSCODECS

Hello Everybody,

I am trying to implement MP3 Decoder on  C64x+ DSP but I have problem with decoding mp3 files with bit-rate lower than 64kbps. 

I have mp3 file of this format

MPEG 2.0 layer 3
16kbit, 170 frames
16000hz Mono

but the decoder does not decode it properly. If I generate mp3 file with bit-rate 64kbps and higher and decode the file on C64x+ DSP than the decoder works well. The decoder should work because it is said in doc MP3_L1L2L3_Decoder_C64XPLUS_UserGuide.pdf that following bit-rates are supported:

"Supports bit-rates of 32 to 448 kbps for Layer 1, 32 to 384 kbps for Layer 2, and 8 to 320 kbps for Layer 3."

Even the VBR files are not decoded well because the bitrate usally falls to 8kbps (when silence). 

Could you please help me? What am I doing wrong? I have implemented the code inspired by example TestAppDecoder.c provided by TI.

Thank you very much in advance.

Lukas Dibelka

 

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