Quantcast
Channel: Forums - Recent Threads
Viewing all 262198 articles
Browse latest View live
↧

INA271: IN+ terminal outputs about 1V when the terminal is open.

March 26, 2018, 9:59 pm
$
0
0

Part Number:INA271

 Hello guys,

 One of our customers is evaluating INA271 now. Their evaluation circuit is almost same as the simplified schematic on page 1 in the device datasheet (SBOS381E). But one point is different from the schematic. it is that a relay has been inserted between the -16V to +80V supply and  IN+ terminal and between IN- terminal and Load.

 When those relay were off (opened) and INA271 was powered on with 5V , they found about 1V was observed on IN+ terminal.

 Is this a normal operation? Also they would like to know why about 1V is observed on IN+.

 Could you please give me any reply?

 Your reply would be much appreciated.

 Best regards,

 Kazuya Nakai.

 

↧
Search

TMS570LC4357: N2HET for PWM monitor and PWM monitor internally and externally

March 26, 2018, 10:16 pm
$
0
0

Part Number:TMS570LC4357

Hi Team,

  My customer want to use N2HET for PWM monitor internally and externally, for internally monitor, there is no external connection for PWM output and N2HET, for externally monitor, an external connection implement between PWM output and N2HET input.

  During TMS570LC4357(337PIN ZWT package) usage,   customer has concerns on using W3（PWM5A)/ N2(PWM5B)/ J1(PWM6A)/ P2(PWM6B)/ V7(PWM7A)/ T1(PWM7B) for PWM monitor internally:   there is only definition for

N2HET1[06] output but without input definition, should W3 used for PWM5A monitor internally?

Expect for your reply, thanks.

Best Regards

Benjamin

↧
↧

CCS/CC2652R: CC2652R predefined symbol

March 26, 2018, 10:31 pm
$
0
0

Part Number:CC2652R

Tool/software: Code Composer Studio

Hi,

I develop cc2652r ble5 peripheral project, but  i can't find  predefined symbol.

BR,

Alvin

↧

DAC082S085: Wake up time issue

March 26, 2018, 10:36 pm
$
0
0

Part Number:DAC082S085

Hello,

Our customer use the DAC082S085.

The customer use power down mode.

When the customer exit power down mode, there is tWU issue.

I attach the scope shot of issue.

(Please visit the site to view this file)

It is mentioned the tWU is 6us typ @VA=3V on the datasheet.

When the customer exit power down mode after 8sec from set in power down mode,

the tWU is 4ms.

Do you have any idea what cause it?

Best Regards,

Naoki Aoyama

↧

CC2640R2F: SDI protocol in ti-simplelink/ble_example GitHub specification

March 26, 2018, 10:40 pm
$
0
0

Part Number:CC2640R2F

Hello.

1. I want to know the role of below four variable in \\GitHub\\ble_examples\examples\rtos\CC2640R2_LAUNCHXL\bleapps\spp_ble_server\

I import above the project in CCS v7.4, but i cannot found any functions that are referred below them.

UART_BUF_CNT
SDI_UART_FC_THRESHOLD
SDI_UART_IDLE_TIMEOUT
SDI_UART_INT_ENABLE

2. Is there spec. or documents about SDI protocol? I know that this is similar with TLI protocol in OAD

(But Idon't found it)

Thanks!

↧
↧

RTOS/AM5728: 3 wire SPI driver for RF 2052

March 26, 2018, 10:42 pm
$
0
0

Part Number:AM5728

Tool/software:TI-RTOS

Hi I have an RF device RF 20252 connected to AM 5728 on SPI. Im trying to write a slave driver for this RF. The AM5728 is  connected using only 3 wires, only chip select, clk and data (either D0 or D1) from AM 5728 to RF. Given below is the diagram showing interfacing of the rF device to a typical controller and the corresponding write and read timing diagrams.

As shown in the diagram above, the chip select has to go low after 1 clock cycle and remain low for the entire transaction. In case of the write transaction, a start bit is followed by a 0 to indicate write transaction, followed by the actual Address and data.  The read follows a similar pattern with the difference that after the address is sent, the driver will get the read data only after 2 clock cycles. Following are the questions that i had:

a>Will the above protocol be supported by SPI master on AM 5728? 

b>How do i ensure that Chip select is delayed by 1 clock cycle?

c>Only 1 data line gets used for read as well as write. Does this mean i have to use the SPI master in half duplex mode? In case of read, it means i first set up the SPI master in tx_only mode to write the address and then set it up in rx_only mode to read the data?

d>Is there any reference example available for similar usage of SPI? the PDK example does not use SPI in the same manner?

↧

LM3880: About ESD

March 26, 2018, 10:43 pm
$
0
0

Part Number:LM3880

Dears,

 I have a customer who used LM3880 encountering some ESD issues.

I was told that It works fine under normal condition. But the LM3880 tends to be a low level with interference, which causes CPU's reset, and the phenomenon can be seen with eyes, as well as unacceptable. we need pass the ESD in the 7kv on our product ground line with no reset phenomenon.Could you give some direction?

Best Regards,

Jenny

↧

SN74AHC541-Q1: VIH and VIL for OE port

March 26, 2018, 10:45 pm
$
0
0

Part Number:SN74AHC541-Q1

Hi team,

 

My customer asks question about VIH and VIL for OE2 of SN74AHC541-Q1.

 

There is a Table of “recommended operating conditions” in the datasheet, is it also applicable for OE2 port?

If not please provide VIH, VIL, and input transition rise or fall rate.

 

Best regards,

↧
Search

TM4C129XNCZAD: ADC raw interrupt does not triggered if using PIOSC for both system clock and ADC clock

March 26, 2018, 10:57 pm
$
0
0

Part Number:TM4C129XNCZAD

Hi,

I am having this issue of ADC raw interrupt does not trigger if using PIOSC for both system and ADC clock. below is the code I use to do the testing. If the SysCtlClockFreqSet() is commented, the ADC does not interrupt does not triggered. Just wondering what could be the work around?

#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include "sysctl.h"
#include "gpio.h"
#include "adc.h"

int main(void)
{

uint32_t pui32ADC0Value;

//SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ | SYSCTL_OSC_MOSC| SYSCTL_USE_PLL |
// SYSCTL_CFG_VCO_480), 120000000);

SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC0);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);

GPIODirModeSet(GPIO_PORTD_AHB_BASE, GPIO_PIN_4, GPIO_DIR_MODE_IN);
GPIOPadConfigSet(GPIO_PORTD_AHB_BASE, GPIO_PIN_4, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_ANALOG);

ADCSequenceConfigure(ADC0_BASE, 3, ADC_TRIGGER_PROCESSOR, 0);
ADCSequenceStepConfigure(ADC0_BASE, 3, 0, ADC_CTL_CH7 | ADC_CTL_IE | ADC_CTL_END);
ADCSequenceEnable(ADC0_BASE, 3);
ADCIntClear(ADC0_BASE, 3);

ADCProcessorTrigger(ADC0_BASE, 3);
while(!ADCIntStatus(ADC0_BASE, 3, false));
ADCIntClear(ADC0_BASE, 3);
ADCSequenceDataGet(ADC0_BASE, 3, &pui32ADC0Value);

while(1);

}

↧
↧

TPS62136: Snubber design

March 26, 2018, 10:58 pm
$
0
0

Part Number:TPS62136

Hi Engineer,

We have a use case that is Vin=11.6V, and Vout = 8V/2A using TPS62136.

How could we design the Snubber to prevent the EMI?

do TI have any tool to calculate?

Thank you.

↧

Linux/PROCESSOR-SDK-AM335X: Porting Linux SDK to Raspberry Pi

March 26, 2018, 10:59 pm
$
0
0

Part Number:PROCESSOR-SDK-AM335X

Tool/software: Linux

I want to know that the provided Linux SDK for Sitara processor is works in kernal space or in user space...??

because i want to port this SDK to Raspberry pi board..

Thanks in Advance 

Siva ram

↧

Linux/CC2531: cc2531

March 26, 2018, 11:04 pm
$
0
0

Part Number:CC2531

Tool/software: Linux

Hi 

I am a beginner to Zigbee Mesh topology, I have Zigbee S2C modules as Routers and End devices. My doubt is will the CC2531 act as coordinator if it does, please describe a method to add the Zigbee S2C modules to the CC2531 IOT gateway. I have attached the CC2531 to the Beaglebone Black and have setup the IOT gateway. I am able to setup the Gateway and able to see it on my Linux terminal. But when try toconnect my S2C modules to the gateway they are not getting recognized

↧

CC3220S-LAUNCHXL: Send SMS with cc3220s

March 26, 2018, 11:04 pm
$
0
0

Part Number:CC3220S-LAUNCHXL

Hello,

Is it possible to send a text message using cc3220s? Any ideas, suggestions are welcome.

Thanks,

David

↧
↧

CEDVStatus() == 0x0056 GaugingStatus ?

March 26, 2018, 11:07 pm
$
0
0

CEDVStatus () appears at sluubd3c.pdf in the following two places.

p.59 9.1.2
p.62 9.1.7

However, searching STD SBS, Extend SBS, Manufacturer Access, DF does not hit.
Therefore, I guessed from the flag bits VDQ, DSG.

CEDVStatus() == 0x0056 GaugingStatus

Is this wrong?
If it is wrong, please tell me the correct information.

↧

BQ24773: I2C speed - 400kHz possible?

March 26, 2018, 11:08 pm
$
0
0

Part Number:BQ24773

Hello,

in the datasheet for the bq24773 on page 23 paragraph 8.5.2 it is mentioned that the I2C interface supports fast mode with 400kbits.

In the specification paragraph 7.6 timing requirements only 100kHz SMBus speed is mentioned.

Is it safe to operate the chip with 400kHz I2C speed?

TIA

Christian

↧
Search

DS90UB964-Q1: Power Supply Filtering

March 26, 2018, 11:11 pm
$
0
0

Part Number:DS90UB964-Q1

[ DS90UB964-Q1 ] Power Supply Filtering

Hi,

With regards to the power supply pi filter, do you have the specific target frequency range where are required to cut out to minimize the noise from / to DS90UB964-Q1? The schematic and BOM below are quoted from EVM user guide.



Thanks,
Ken

↧

RTOS/TDA2P-ACD: Loading binaries (or AppImage) through UART

March 26, 2018, 11:11 pm
$
0
0

Part Number:TDA2P-ACD

Tool/software:TI-RTOS

Hello All,

For one of our requirements, we have to boot TDA2Px-EVM through UART.

Is it possible to load the binaries (AppImage as well as individual core's binary file) through UART.

If possible, any reference to it in Processor SDK 03.02 would help.

Regards,

Abhay

↧
↧

9DML04

March 26, 2018, 11:15 pm
$
0
0

Hello,

            Do we have any solution to compete 9DML04 ? Thank you 

BR

Patrick

↧

MSP432P401R: Signal deterioration at ADC Pin

March 26, 2018, 11:16 pm
$
0
0

Part Number:MSP432P401R

I have a MSP43P401R Launch Pad kit. I have configured Pin 4.7 as my ADC-0 Pin and am using it to read data from a filter which I have made myself.

The issue is that when the output of the filter is measured on the MSO, the signal is clear without noise/distortion.

However, when I connect this output of my filter to the ADC configure Pin 4.7, the same signal reduces in amplitude to a value far below the input signal value.

For instance, I have provided a 6Hz 100mVpp Sine wave to my filter designed as a LPF with Fc at 20Hz. The waveform is as shown below,the yellow wave is the output of the filter.

However, when the output is connected to P4.7(ADC0) pin this is the outcome,the yellow output signal line falls almost flat:

Certain points of clarification:

  1. The filter has been designed with a cut-off of 20Hz and is a 6th order filter with an amplification stage at its output. It has been tested separately and works.
  2. The ADC has been used without interrupt and the value from ADC14MEM0 register is read via a function call by polling.
  3. The function generator when connected directly at the ADC pin provides, a clear output signal without attenuation.
  4. I have attached a Coupling capacitor of value 1uF at the output of my filter to remove the DC offset. 

What could be the cause of this deterioation?

↧

CC2630: Is there any way that Main CPU Communicates or sends data to Sensor controller

March 26, 2018, 11:22 pm
$
0
0

Part Number:CC2630

 I met with some difficulties in using Sensor Controller Studio.  I want to use the Sensor Controller Studio to implement that it receives data from the main CPU. For example, Main Cpu sends on/off to the sensor controller. sensor Controller  controls  GPIO/Peripherals based on value sent by main cpu

↧
Viewing all 262198 articles
Browse latest View live
Search
<script src="https://jsc.adskeeper.com/r/s/rssing.com.1596347.js" async> </script>