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BQ2004: BQ2004 - NiMH charger for the function of over discharging protection

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Part Number:BQ2004

Dear E2E,

customer is looking for NiMH battery charger solution with the function of over-discharge protection.

I didn't see power path FET in reference circuit. could this part have the protected function of over-discharge?

How to make the circuit to do it?

if no, any other suitable part could support this case?

BR,

Jason


CCS/CC2640R2F: how to create mesh network

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Part Number:CC2640R2F

Tool/software: Code Composer Studio

HI

I wanted to create a BLE mesh network using CC2640R2F launchpad controllers, here I am using CCS software

I have seen in E2E about mesh network i have doubt cc2640r2f is it support for mesh network ?

it will support means

so which examples program should I need to use and how do I proceed

 please anyone give some steps or procedure to create mesh network using CC2640R2F

thank you

CC3200: IOT WiFi mesh network possibility with CC3200 ?

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Part Number:CC3200

Hello, so I am working on industrial IOT WiFi mesh network, I need to enable all modules to communicate with each other. I already read that CC3200 doesn't support working as AP and Station simultaneously. I want all the peers to exchange data and when that one node receive data from them (AP which is connected to the router) it changes the mode and send all data to the cloud to our server.

I've thought of some techniques and I hope if someone can answer if my technique is feasible or no:

1- Nodes would communicate using WiFi Direct between each other, and only that node connected to the router (gateway) would be connected to the router as a station, it will get data from other nodes through Direct WiFi. the question here is that node gonna be capable of establishing Direct WiFi with more than 1 node then act as a station with the router?

2- 2nd approach : Nodes would be working on SoftAP also as stations. so basically when they receive data they will be on SoftAP mode then they will send data to the far nodes acting as stations (According to SoftAP it enables the module to act as AP while it's acting as a station), and then finally when the gateway node ( node connected to router) receives data as SoftAP from those far nodes, it will work as a station and send data to the router gate way. is it gonna work? and is it true that as a SoftAP the device can connect to only 1 station?

3- If the CC3200 is not supporting those techniques, what is another module except ESP that I can use in my company project for industrial solution ( Not high price and supported ) ?

Thanks

dlp4500: c++ sample code

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Part Number:dlp4500

Hi there, 

I'm currently using DLP4500 to project some pattern image and at the moment I'm controlling it through the GUI and external signal to trigger the pattern projection. I wish to control the projector through my own c++ program. Is there any examples that I could refer to on this? I'm looking at setting the pattern sequence and starting the pattern sequence only. 

RTOS/TMS320C5517: Program will not fit into available memory

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Part Number:TMS320C5517

Tool/software:TI-RTOS

Hi all,

I am new to DSP. Currently I am working on a project, which need to use Real Time Analysis tools, once I set the configuration in .tcf file to enable Real TIme ANalysis, RTSX and HST, when built the project it will facing not enough memory in DARAM. So what is the best way to free out memory in DSP ? 

Output Impedance characteristics

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Hi, team.

A output impedance vs frequency is indicated on several LDO, but how should this parameter be used?

Is it related in stability or noise performance?

Best Regards,

TPS2549-Q1: tps2549-q1 CDP mode charging current range

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Part Number:TPS2549-Q1

Hello

Is it correct to charge 2000mA in CDP mode only when iAP (apple authentication IC) is built-in to Tps2549-q1? We are considering applying the TPS2549-Q1 to the head unit of the vehicle, but the iAP is not built-in. If so, is it possible to charge up to 2000mA in CDP mode using a genuine cable with built-in iAP?

Please help me.

TPS7A90: LDO as a load switch

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Part Number:TPS7A90

Hello,

My application has a sensor which requires regulated voltage for precise measurement, also requires it to be low-powered so I need to turn off the sensor when not in use. I have seen that Iq and I shutdown are low for LDO. Can I use it as a load switch as well?

Regards,

Prudhvi Sagar


RTOS/CC3200MODLAUNCHXL: UART/CC3200MODLAUNCHXL

MSP430FR6989: MSP430 JTAG interface for ESD protection

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Part Number:MSP430FR6989

Hi community member,

I received questions from my customers about MSP430 JTAG interface for ESD protection.
Please let me confirm the following a question.

Device : MSP430FR6989

[Question]

1-1.Is it possible to insert a resistor between the MSP430 and JTAG debugger for ESD protection?
1-2.If answer is possible, is there a recommended range of resistance values?

2.Is there information other than the data sheet for MSP430 internal circuit of RST, TDO, TDI, TMS, TCK, TEST pin?

Best regards.
Cruijff

LMK04828: How to set power down for VCO0/1

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Part Number:LMK04828

Dear Technical Support Team,

I have a question about dual Internal VCOs.

Does  LMK04828 have power down mode either VCO0 or VCO1?

For example)

When using VCO0 for RF application, unused VCO1 makes spurious of VCO1 frequency.

I expect the reduction of spurious when power down of VCO1. 

Best Regards,

ttd

WL1837MOD: About WL18xxMOD_Certification_Reports

TM4C129ENCPDT: Howto simulate EMAC error

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Part Number:TM4C129ENCPDT

Back to OLD question never answered and might disturb on the field...

Amit,
Would you be so kind and answer the other questions as well? here goes again:

1. For logic testing purposes, How can I simulate EMAC_INT_TX_STOPPED, EMAC_INT_RX_STOPPED? Other errors?
2. When error occurs on a given TX descriptor, will the EMAC continue to the next descriptor?
3. When error occurs on a given TX descriptor, will the EMAC reset that DES0_TX_CTRL_OWN?

tps7b7701-q1: Device Ron in Power Switch Mode

CC2640R2F: Review the layout which designed by CC2640R2F+CC2592.

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Part Number:CC2640R2F

Hi Team,

       My customers would like to design CC2640R2F+CC2592 following the TIDesign "CC2650+CC2592".

But They are not sure if it is true layout like below pic. Could you help me review it? Thank you!


TPS92692: TPS 92692 spreadsheet values v TPS92691 Webench

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Part Number:TPS92692

I'm having some trouble with the TPS92692 tripping the fault detection, and I've discovered that there's a big difference between the source current monitoring resistor for the TPS92692 in the the spreadsheet and the same resistor for the TPS92691 in Webench. I know the threshold for overcurrent detection is higher in the TPS92691 (525mV, compared with 250mV for the TPS92692), but I wouldnt have expected the two values to be so far apart - the spreadsheet gives 90mohm for the TPS92692, and Webench gives 8mohm for the TPS92691. When I used 90mohm in my circuit, it wouldn't run. I was getting a brief flash every 50ms or so. I dropped the resistor to 25mohm, and it runs much better, but is still hitting the over-current trip at supply voltages below 9.25V. Anything less than 25mohm fries the MOSFET. The supply voltage range entered into the spreadsheet and Webench was 8 - 30V. The load is a string of 18 white LEDs, running at 500mA. Am I asking too much of the circuit?

TM4C129ENCPDT: EMAC Interrupt errors handling

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Part Number:TM4C129ENCPDT

Assuming the code enables ROM_EMACIntEnable with only relevant:
EMAC_INT_PHY | EMAC_INT_RECEIVE | EMAC_INT_TRANSMIT | EMAC_INT_TX_UNDERFLOW
And assume any non-listed other error occurs (EMAC_INT_BUS_ERROR, EMAC_INT_RX_NO_BUFFER ... )

1. Will the EMAC stops? will not interrupt the code anymore?
2. Which one might occurs?

and if so
3. How can we detect errors that are NOT listed in the EMACIntEnable?
4. What is recommended to do in that case? Clear any pending interrupts? How?

soft-reset
5. does it clear all pending descriptiors?
6. what is the best way to do it?


PCM5121: PCM5120_SPDIF_ROM_OPTICAL doesn't work

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Part Number:PCM5121

Hi

Our customer tried to evaluate PCM5121 using EVM with PCM5120_SPDIF_ROM_OPTICAL configuration, but it has not worked. (No sound output)

As hardware settings, they set as Figure 3 of application report.

http://www.tij.co.jp/jp/lit/an/slaa541/slaa541.pdf

As probing at TP10_13, clock frequency are SCK: 22.579MHz, BCK: 3.072MHz, LRCK: 48kHz.

And Page0/Register 118 represents Wait for CP voltage valid (0001) as power state register.

Can you see any other necessary procedure to configure EVM board to work using PurePathStudio ROM image?

BestRegards

PGA460-Q1: PGA460 current consumption

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Part Number:PGA460-Q1

Dear TI team,

In the PGA460-Q1 datasheet, the current consumption is stated up to 500mA during bursts (see Iburst, §6.3). Is there really 500mA flowing in the VPWR pin during the burst ? The PGA has two N side MOSFETs for its output drive, so I would expect that if I set the current to 500mA, the current is supplied from the external power supply to the central tap of the transformer (in an transformer configuration), then to the PGA via the OUT pins. I don't understand if this value stated in the datasheet is a mistake, or if it really behaves like this.

Could you let me know more ?

Thank you in advance,

Sam

RTOS/CC2640R2F: Device Struck in cpu IDLE mode until any external interrupt

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Part Number:CC2640R2F

Tool/software:TI-RTOS

I am using TI BLE stack version 3.1.0(blestack not ble5stack), SDK(simplelink_cc2640r2_sdk_1_40_00_45)

My application uses "PowerCC26XX_standbyPolicy" in Power26XX.c as a power policy function

const PowerCC26XX_Config PowerCC26XX_config = {
    .policyInitFxn      = NULL,
    .policyFxn          = &PowerCC26XX_standbyPolicy,
    .calibrateFxn       = &PowerCC26XX_calibrate,
    .enablePolicy       = TRUE,
    .calibrateRCOSC_LF  = TRUE,
    .calibrateRCOSC_HF  = TRUE,
};

From the defenition of PowerCC26XX_standbyPolicy,I have the following observations

1)When entering Standby ,the wake up interrupt is set considering RTOS input ( ticks = Clock_getTicksUntilInterrupt(); ),which is not done when switching to IDLE mode of cpu and also when entering PRCMSleep(); ,Do we have reason for this?

2)When doing it in this way we are struck in IDLE mode or WFI forever unitl we trigger some interrupt?

Do you have any time dependent parameter in above cases?

Do you have any recommended policy that can resolve my issue?

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