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LMK00101: Is there a TI Clock buffer which its input clk is 3.3v tolerable while its VDD powered by 2.5V ?

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Part Number:LMK00101

In any Clock buffer I found in here, the Vih in the Recommended operatings is defined to be VDD+0.3v/0.5v.  

Is there a clock buffer in which the Vih can tolerate 3.3v evemthough the VDD=2.5v ?


TSW3085EVM: TSW 3085 EVC rev c TSW1266 rev a DAC3482 ADS5402

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Part Number:TSW3085EVM

I have a question about using this platform.

I send samples WCDMA signal with 614.4Mhz sampling. on tsw308x I start from the Regs of the User's Guide of the TSW308x Evaluation Module with the NCO and QMC disabled. I do this so that the center frequency in the receiver is the same.

In the receiver I use the settings of the u User's Guide. And I analyze the NMSE of the received signal using MATLAB.

Using the example signal I achieved NMSEs better than -20 dB

I noticed that the sample signal is a signal multiplied by a cosine on channel 1 and by a sine on channel 2 and edited a similar signal, also reaching -20 dB of NMSE.

I tried to send a 4-QAM signal being the in-phase part in channel 1 and quadrature in channel 2. And in this way the NMSE got worse, reaching -7dB. Is it possible to send any type of signal using this platform, or does the signal in channel 2 have to be 90º out of phase, but equal to channel 1?

DLP3010EVM-LC: Radiant quantities of DLP3010EVM-LC optical module

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Part Number:DLP3010EVM-LC

Hello TI Expert,

 

We have got a question about the specification of the optical module used in the DLP3010EVM-LC.

Would you please check the question and give any information?

 

[Question]

They are trying to measure the optical safety of DLP3010EVM-LC and want to have the following information.

 

- Light power radiant quantities of Ultraviolet region (unit is W or cd)

- Light power radiant quantities of Infrared region (unit is W or cd)

- If there is no information above, Wavelength distribution characteristics of LEDs

 

They cannot measure the power less than 380nm and more than 780nm due to their limitation of their measuring instrument.

So, it would be helpful if you can provide these data as a design information.

 

Almost no light may be radiated both UV and IR region but they want to know about these data for confirmation.

 

Best Regards,

Nobu Arai

CC3220SF-LAUNCHXL: Uart communication error

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Part Number:CC3220SF-LAUNCHXL

Hi,

As suggested in the topic https://e2e.ti.com/support/wireless-connectivity/wifi/f/968/t/730670, I'm implementing an uart communication between our device using the cc3220modasf and a computer program to allow writing files to the device.

I'm experiencing a lack of stability, watchdog resets and non repeatable behavior. 

Basically what I do is:

  1. Computer resets the device
  2. Device start
  3. Device write on Display printf "Ready to sync"
  4. Device close Display and init uart
  5. computer sends a synchronization byte
  6. Device replies with a ACK byte
  7. computer sends data in packets of 200 bytes, waiting for an ack before sending the next packet

I'm initializing with:

UART_Params_init(&uartParams);
uartParams.writeDataMode = UART_DATA_BINARY;
uartParams.readDataMode = UART_DATA_BINARY;
uartParams.readReturnMode = UART_RETURN_FULL;
uartParams.readMode = UART_MODE_BLOCKING;
uartParams.readEcho = UART_ECHO_OFF;
uartParams.baudRate = BAUD_RATE;
uartParams.dataLength = UART_LEN_8;
uartParams.stopBits = UART_STOP_ONE;
uartParams.parityType = UART_PAR_EVEN;
uartParams.readTimeout = MSEC_TO_TICKS(500); //Timeout is in tick
uartParams.writeTimeout = MSEC_TO_TICKS(500);

uart = UART_open(Board_UART0, &uartParams);

And use it like:

ret = UART_read(uart, buffer, 1);

When I just do "ret = UART_read(uart, buffer, 1);" 

It goes fine 10% of the time and goes in watchdog timeout 90% of the times. The same things happens whether the computer sends data or not. 

Same thing when I read uart only if data is present:

UART_control(uart, UART_CMD_ISAVAILABLE, &dataAvailable);

if (dataAvailable == TRUE)
{
ret = UART_read(uart, buffer, 1);

I tried to analyse with the debugger, but could not point to the failure. 

My questions:

Is there a known issue with the uart? 

How would you advise debugging the issue?

Is there a smarter way to implement what I want to do? 

Additional information:

The same uart is used by DisplayUart, which I close during the file transfer to avoid conflict.

I'm using Uart without DMA on pin  UARTCC32XX_PIN_57_UART0_RX and .txPin = UARTCC32XX_PIN_55_UART0_TX,

Using TI-RTOS

Tried with 115200 and 9600 baud rate

I've increased uartCC3220SRingBuffer to 200

DP83TC811SEVM: DP83TC811SEVM's application and communication issue

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Part Number:DP83TC811SEVM

Hi Team,

I'm doing a little project to understand the communication via automotive Ethernet PHY DP83TC811S and evaluate the DP83TC811S using DP83TC811SEVMs. About these I have the following questions:

1. I read the User's Guide of DP83TC811SEVM, in order to link 2 EVMs I need a MatENET cable assembly which is product of TE Connectivity. The first question is that I need to purchase this cable assembly or is it possible to get the cable from TI.

2. Now I have 2 EVMs, 2 MSP430F5529 Launchpads and USB 2 MDIO. I have read the documentations of these hardware and software. Using USB 2 MDIO the register of EVM can be read and written. so is it possible using them to implement some simple functions, such as using USB 2 MDIO to access the register of the EVM, one set of EVM and MSP430 as master, and the other set as slave, the master sends a massage via this Ethernet PHY to the slave to light an LED. 

3. if the test above can not be achieved with these hardware and software, which hardware and software I need to implement the function like lighting an LED.

4. Is there any training material about the DP83TC811SEVM except User's Guide and Datasheet of DP83TC811S.

Best Regards,

Zhouyang Liu

TPS61089: TPS61089 Vout=12V, Vin=0V, how it work

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Part Number:TPS61089

Dear TI:
   If TPS61089 Vout=12V, and Vin=0V,  If the 12V of  Vout will reverse to Vin?

   Below is a screenshot of the TPS61089 datasheet, dost the MOS body diode will blocking reverse voltage? 

   

   

   

DAC60501: DAC Offset Error per Code???

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Part Number:DAC60501

[This is a follow-up on my previous query about offset error (OSE) and zero scale error (ZSE).]

Owing to the fact that linearity is calculated using a reduced code range (somewhere between 10% & 90% FSR), and offset error is the difference between measured and ideal output voltage in the linear region of the transfer function, does it mean that we have an offset error (OSE) per code?

Thank you very much.

CCS/TMS320C6748: What color means in Stack Usage

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Part Number:TMS320C6748

Tool/software: Code Composer Studio

Hello there

         I'm debuging with my TMS32C6748, and I have no idea what the color means in Stack Usage. As you can see, the Inclusive Size of _c_init00  is yellow while others are green. Can I do something to turn yellow to green?


TINA/Spice/SN74AVC16T245: Output duty issue of SN74AVC16T245 spice models

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Part Number:SN74AVC16T245

Tool/software:TINA-TI or Spice Models

When using  SN74AVC16T245 spice models, we found the output duty shift to 44% with an input duty of 50%. When we change the corner from nominal to weak, the duty became worse.

So would you please check the spice model? and what's the duty region for the real products output?

Linux/AM5716: PRM: I/O chain clock line assertion timed out

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Part Number:AM5716

Tool/software: Linux

Hello TI,

I have a custom board based on AM5716, during kernel boot I see log messages  (version 4.4.41+), with following error

PRM: I/O chain clock line assertion timed out

PRM: I/O chain clock line assertion timed out

What could be the reason for these prints?  Please give some pointers to debug this.

Thanks,

Vamshi G.

DRV8308: RPM of EVM

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Part Number:DRV8308

What is the TESTED minimum and maxium rpm that I can expect to achieve with the 8308 EVM and the included BLDC motor?  What frame is the motor?

Thanks

TXS0102: TXS0102 with EEPROM signal issue

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Part Number:TXS0102

Hi team,

Customer is using TXS0102DCTR and they met some signal issue:

The B2 and A2 connect to EEPROM and VLCD is 3.3V.

When I2C0_EEPROM_OP_SCL and I2C0_EEPROM_OP_SDA both set to high, the measured value on these two buses are both 3.3V;

When I2C0_EEPROM_OP_SCL and I2C0_EEPROM_OP_SDA both set to low, the measured value on these two buses are both 0V;

When I2C0_EEPROM_OP_SCL sets high and I2C0_EEPROM_OP_SDA sets low, the measured value on these two buses are 0.7V and 0.5V separately; which is not correct.

The schematic are shown as below. Do you have any idea what cause this problem? 

Looking forward to your reply! Thank you,

Best regards,

Marc

IWR1642BOOST: Could we confirm the board have HW issues?

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Part Number:IWR1642BOOST

Dears:

Many thanks for your suggestions, and I tested it according your requirement.

You can see the below information and it could not test OK, and the other board(IWR1443) is OK.

And the customer just got the IWR1642BOOST, could we confirm the board have some HW issues?

1. the first picture

2. Then there are some Num on the GUI, however, the Num is not changed if there is other people.

3. After a long time there will happen the below picture:

Then I copied the Log as follows:

8270.log.txt

From these information, could we confirm the board have HW issues?

Or you can give me new Demo and I can test it again.

BQ34110EVM-796: BQ34110EVM-796

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Part Number:BQ34110EVM-796

Hello, we bougth an evaluation board BQ34110EVM-796, but we cannot connect it via I2C using the EV2400, or have compatibilities issues with BQSTUDIO. Please need help to resolve this issue.

When I select supported targets 0110_0_01-bq34110.bqz and click Finish to load GUI, it shows and Error saying

"The detected device is not compatible with this application!
Some actions could cause the device to lose communication permanently and enter an unrecoverable state.
Proceed at your own risk.
Select OK to continue, Cancel to close the application."

If I click Continue the GUI shows up but the ICON on the left for the IC is grayed out.

Please let me know what to do to make this work.
Thank you

BQ24780S: Turbo boost mode battery discharge current

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Part Number:BQ24780S

Hi Expert

My NB ODM customer have a adapter spec that need turbo boost work in100uS otherwise will trigger Adapter OCP.( adapter OCP 6A for more then 100uS )

We use 5A system power load rise in 5uS time for test.

We had done some test and modify the reg 0x37 Fast DPM Deglitch Time bits to 50uS, boost enable time will short then 150uS but still longer then 100uS.

And I measure the battery current found after boost work, current use around 80uS from little to start large current discharge.

I don't understand why IC need this time for discharge battery boost current. Is it normal or not? 

The picture channel 4 is battery current( scaler is wrong). Please help answer.

Thanks.

BR

Bruce 


TPA3255: Class D Amp using Audio transformer

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Part Number:TPA3255

Audio team,

Our customer wants to drive a higher voltage output by using an audio transformer on the output of a TPA3255 or similar.  There's an app note mentioned in this e2e post.  Can you provide a link or forward it please?

Referencing:

e2e.ti.com/.../639669

Thanks,

Darren

DS90UB914A-Q1: What is Parity error?

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Part Number:DS90UB914A-Q1

Dears:

The customer uses 914 in the system and have some question about the below information:

1.  Is there any influence if Lock/Signal Detect is 1 and Parity error is 0? 

    Btw, the signal of BISTEN is low, then 914 is under PCLK MODE.   The frequency is 1280*960, and PCLK is 96MHz.

2. And customer sets the frequency is 720P, and PCLK is 74.25, the Parity Error is 0.

    If customer wants to realize the 1280*960, how could we do?

Pls. give some advice.

TLV61046A: Current Limit vs Temperature data

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Part Number:TLV61046A

Hello.

I have a question about TLV 61046A.

Datasheet P7
Figure 8. Current Limit vs Temperature.
Conditions: VIN = 3.6 V, VOUT = 12 V
It is a graph of this condition.
Conditions: VIN = 3.6 V, VOUT = 24 V
Is there a graph of this condition?

Thank you.

TMS320F28377S: GPIO Pin identification

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Part Number:TMS320F28377S

Good morning,

I´m new using TI microcontrollers, I just want to know how i can identify or were to read which pins of the board correspond to de GPIO pins speciffied in the simulink digital output block? it ask for a GPIO group but which of them correspond to de J4 o J2 buses of the mainboard?

Thank,

Juan Antonio

LMZ21701: Enter in oscillation on new production boards, but was ok on 98% of older production

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Part Number:LMZ21701

What could keep the switcher in oscillation?  Vin 12V steady, output 5V5 with enable pin used.  Current around 500mA max normally.

When enabled, PG oscillate and also Vout.

If the switcher is working ok on more than 100 boards of older production, and this new production of the exact same board/parts would have issues with the switcher.

The only thing we think is that some parts tolerance (including the LMZ21701SIL) can be different on that production (more than 16 cards) so the inrush current is little bit higher when enabling the switcher so that cause it to shutdown, and retry...shutdown...retry...etc.

Why it can't come back on track by himself?

By pursuing the idea of inrush current, I've changed the SS cap from 3.3nF to 100nF.  It seems to work the first time at boot, but when disabling and re-enabling the supply again, it come back in oscillation. 

If disabling and re-enabling again, it come back on track....doing it again, it works...

so at first boot with 100nF it's working, but after that it fail/work/fail/work in alternate way after each enable/disable.

We just found a weird thing on some cards (not each) that replacing a ferrite bead on the board for a short makes the switcher not fail...which is really weird...

I hope to have some clue here!

thanks

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