Part Number:SN74GTL1655
Hi team,
My customer met an output ringing issue when using SN74GTL1655. Below is the test data.
When input (BLue) is slowly ramping in the slew rate of ~2.3V/ms, the output (green) will generate a pulse rather than a simple step.
Could you give any advice how to avoide such issues?
1. Is there any input slew rate requirement of that chip?
2. Is there any way to avoid the ringing in current slow slew rate input?
Thank you!
Part Number:AM5728
Tool/software: Linux
Hello,I tried to figure it out how A15 kicks PRU through RPMSG & mailbox,can you help me ,thanks ahead.
I read drivers/remoteproc/pru_rproc.c
static void pru_rproc_kick(struct rproc *rproc, int vq_id)
{
struct device *dev = &rproc->dev;
struct pru_rproc *pru = rproc->priv;
int ret;
dev_dbg(dev, "kicking vqid %d on PRU%d\n", vq_id, pru->id);
if (pru->mbox) {
/*
* send the index of the triggered virtqueue in the mailbox
* payload
*/
ret = mbox_send_message(pru->mbox, (void *)vq_id);
if (ret < 0)
dev_err(dev, "mbox_send_message failed: %d\n", ret);
} else if (pru->irq_kick > 0) {
ret = pruss_intc_trigger(pru->irq_kick);
if (ret < 0)
dev_err(dev, "pruss_intc_trigger failed: %d\n", ret);
}
}And I thought the driver rpmsg_pru should call "pru_rproc_kick" when it A15 send data out .
But : in drivers/rpmsg/rpmsg_pru.c("-->" means call )
rpmsg_write() --> rmpsg_send() --> virtio_rpmsg_send --> rpmsg_send_offchannel_raw --> virtqueue_kick
I am now getting confused , question is :
1. How do the driver "rpmsg_pru.c" kicks PRU, I think the driver must access mailbox.
2.How do these drivers cooperate? "rpmsg_pru.c", "pru_rproc.c", "omap-mailbox.c"
Part Number:TIDA-01436
For people counting,how can we recompile rico board kernel image and what are the steps for it.
Part Number:AM5728
Tool/software: TI-RTOS
Hi
as follows:
-------
int *ptr;
ptr =(int*)malloc(10);
ptr =(int*)malloc(20);
a valid pointer is returned when firstly calling malloc: ptr =(int*)malloc(10);
but 0x00000000 is returned when calling ptr =(int*)malloc(20);
WHY?
Part Number:TPS2373
Hi team,
Our customer evaluated TPS2373 EVM and meet some issue,
they use PLANET (PoE-171A-95) 802.3bt PoE injector test EVM and find below message,
" The TPS2372 is also able to interoperate with non standard PoE++ PSE controllers"
1. Customer would like to know how TPS2373 to verify PSE is non-standard and how to analyze?
2. TPS2373 can still support 60W load with worming message above, it means TPS2373 also support non-standard?
3. Do we have recommend BT PSE injector?
Thanks & regards
Eddie
Part Number:SN65HVD1794
Hi team,
For SN65HVD1794, D pin & R pin, do they need external resistor to pull up to VCC?
Customer said they check the R pin voltage is 5V without pull up resistor. Have they been pulled up inside the device? are they open drain output?
We use 5V to power SN65HVD1794, Can we use resisitor pull up D & R to 3.3V like below picture show, because customer use 3.3V MCU in their applicaiton.
Can you share the SN65HVD1794 functional block diagram?
thanks a lot.
Part Number:RM48L952
Tool/software: Code Composer Studio
the version of CCS is CCS for arm V6.2. can the *.out file transform to *.hex? like the hex2000? thanks very much.
jianlei
Part Number:DP83822I
Hi,
I have to replace the TLK105 IC with an DP83822 IC. In the Datasheet of the TLK105 it is mentioned, that the IC can be used for ProfiNET applications.
In the Datasheet of the DP83822 nothing like is mentioned. Is the DP83822 able to use in ProfiNET applications?
Thanks for your answer.
With best regards
Fabian
Part Number:DRV8301
Hi Sir
Please kindly help to check this OCP issue
When system power up ,DRV8301 will report OCP event to SOC
At this moment ,there is no load on the output
MOSFET Rds(on) = 1.2mohm~1.6mohm / report mode only / OC_ADJ_SET=0.175V on Vds => Over current rating is 145A~109A
schematic is below PDF
| D10 | D9 | D8 | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 |
0x02 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 0 |
0x03 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
(Please visit the site to view this file)
Part Number:UCD9090
Hi Sir,
If our customer want to USE the Remote Thermal Controller to support 12 Fan, then do you have any PN suggest for this application?
6*PWM
12*TACH
Hugo
Part Number:DRV8825
I pulse the STEP pin to drive a step motor to rotate half a circle in forward and reverse direction.
But after I stop pulsing the STEP pin， the motor makes some noise.
However, if the motor rotates in the forward direction before I stop pulsing, the noise usually occurs.
if the motor rotates in the reverse direction before I stop pulsing, I didn't hear the noise. So strange.
My configuration of DRV8825 is as follows：
8 mocro-step,1,4A full-scale chopping current, mixed decay mode.
Could you tell me what may cause the noise?
Part Number:IWR1642
Hi team,
A customer is asking which material should be used in IWR1642 product.
Customer is consider about the cost and the simplicity for manufacture.
He had mention that PTFE can not be used in injection molding production.
Customer had already know the experience we did for different materials.
Did you have any recommend material for that?
Thanks.
We are looking for a driver circuit / application to control motor speed and direction via a full-bridge / H-bridge driver.
The motors a 230V DC, 150W, 0.9A, brushed.
Ideally, the input voltage for the application would be 230V AV (mains). An isolated powersuplly, step down, buck) from the rectified 230V AC (= 325 DC) would
also be possible as an input stage.
Thanks in advance !
Part Number:TDA2
Tool/software: TI-RTOS
Dear Team,
Is there any example to show how SRV video image can be stored on SD-CARD?
My customer want to have an example to store combined image of 4ch SRV, but any usecase would be welcome.
My customer is using VisionSDKv3.0.
Thanks and Best Regards,
SI.
Part Number:BQ35100
Hello,
I would like to use this chip (BQ35100) for a battery pack enclosure system we're developing for Lithium Thionyl Choride batteries.
In the same enclosure the pack could be 3.6v, 7.2v, 10.8v or 14.4v. My question is, would the fuel gauge be suitable for an application such as this where it may be monitoring a 3.6v pack and then the next time the enclosure if filled it could be 10.8v and so on. Does the chip need to be recalibrated each time the pack is changed? Are there any similar applications of the BQ35100 existing to the one I've just described?
Thanks,
Karl
Part Number:BQ24780S
We plug-in the adapter for the first time without baterry. IC will driver the BUCK for some time .
During this time, I found that the waveform of H-gate is the same as that of phase，the waveform diagram is shown below.
As is shown in , the output is normal.
So, how is H-gate opened.
Part Number:LMP91000
I am planning to use the LMP91000 in an evaluation project with a 3 lead amperometric cell: an NO2 cell, requiring a negative bias.
I wanted to be able to have access to the precise voltage used for the internal zero at the trans-impedance amplifier and one way to do this seems to be to use bypass mode for INT_Z where I am providing the INT_Z from an external reference source.
If I then use the LMP91K in 3 lead mode, will the A1 amplifier and variable bias blocks still be in functional mode i.e. driving the external Vref plus/minus (0-24%) as bias to the CE terminal?
Part Number:LMZM33603
Please Provide .dxf file for the Land pattern.Some Dimensions we could not find in the given Land Pattern.