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RM48L952: RM48L952
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LM140QML: Quiescent current for LM140H-12/883
Part Number:LM140QML
If I’m understanding this part, a NPN linear regulator, the Iq current should be some gain factor of the current to the load. Thus as the current to the load increases the Iq current should increase. Upon testing a part made per MIL-M-38510/10703BX, just the opposite happens. Iscd decreases based on the load current increasing. This Mil spec lists the LM140 as a generic PN to this specification. TI is not listed on the QML for this part. I would like to know how this part reacts in the circuit to see if it would work in my existing circuit.
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BQ76930: BQ76930
Part Number:BQ76930
Hi,
I am looking for help for the design of a BMS with 8 cells LifePo4, using the BQ7693003DBTR for voltage measurement and balancing and the BQ78350DBTR-R1 for communication.
The problem is balancing. I measured 3mA when the BAL_OK register is ON in BQ Studio. The goal is to have a balancing current of about 150mA
If you need more information, contact me.
Main sheet :
Balancing sheet :
Best regards,
Pedro DA CUNHA
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MSP430FR2433: Is there a race from Vcore regulator off PMMREGOFF to LMP4.5? Using CCS software debugger through a sleep.
Part Number:MSP430FR2433
The User's Guide says PMMREGOFF == 1 "regulator is turned off when going to LPM...". Does this mean the regulator is not turned off immediately, but only when you actually set the LPM bit in the SR register? So there is no limit to the number of instructions between those, i.e. not a race to get to sleep?
The reason I ask is because of this post (which is not an official TI statement) that seems to say there is a race.
Also, I recall some document saying the JTAG module is unpowered during LPM. This post discusses an issue with stepping through or setting a breakpoint on (in the debugger) the LPM4 instruction ( a macro or a __bis instruction). Not exactly a race, but when the MSP430 enters LPM, the JTAG module continues "executing" for a short while and tells the sw debugger (say gdb) that the next instruction is the one following the LPM instruction (where actually the next instruction is in the C reset handler)?
And the usual NOP after a LPM instruction is only a target for the debugger for the case where the LPM instruction fails to enter low power mode for any reason?
I am also reading CCS User's Guide, the section about debugging LPM but IMO it is not very precise about how the software debugger syncs up after LPM, whether a delay is required in the code, whether some other code is required at the beginning of the reset handling to allow the software debugger to resync with a waking MSP430.
Finally, the CCS User's Guide says (I am paraphrasing) the debugger indicates the target is sleeping, but it is unclear where the indication appears. AFAIK it may be a suffix on the project title, saying something like "myProj: (Debug: No power, no clock)" ?
I have not yet successfully used the debugger to get into and out of a sleep, its probably something else in my code, but I am seeking guidance on how to use the debugger to do that, and what the results in the debugger should look like.
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LP87332A-Q1: J6Entry for PMIC POWER LP87332A
Part Number:LP87332A-Q1
Dear,
we use LP87332A for J6 Entry, we find the LDO1 should be 3,3V, but measurment only 1.8v
and LDO2 should be 3.3V, but measurment only 0v.
LP87322E LDO1 should be 1.8V, but only 0.4V
LDO2 should be 1.8v, but only 0.4v
below as schematic:
(Please visit the site to view this file)
it's about user guide table 5 setting?
If any suggestion, Please advise me.
Thanks,
Best regards,
Lawrence.
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TMS320F28377S: CAN driver how to communicate with the mailboxes/message objects
Part Number:TMS320F28377S
I'm trying to use the Driverlib but i come more and more to the conclusion that it is made without any vision how to use it in a real application.
So I'm digging in the documentation and that is not helping me either.
Can someone please give a flow diagram how to get access to a mailbox?
I don't understand/can't find in the documentation how the content switching is done.
For example: I like to enable or disable TX interrupt for mailbox 16? or check of mailbox 4 has an RX overflow?
Thanks!
EVS
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THVD1450: THVD1450 transmission distance
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CC3220: What happened to the NWP Programmer's Guide (swru455)
Part Number:CC3220
Is a dead link and I can't find it anywhere
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CC2531EMK: How to see all incoming messages to/from the gateway?
Part Number:CC2531EMK
Hey guys,
I'm running the Z-Stack Linux gateway, and am trying to figure out how to get a list of incoming and outgoing messages from it.
Basically if a node transmits to the gateway, I wanna be able to track it and if the gateway sends a response, I wanna track that too. Ideally, this would be for every transmission sent over the air. Is this possible? If so, what should I do in terms of the gateway to achieve this functionality.
Any help would be appreciated.
Spencer
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AM3358: Execute Public ROM in GDB Debug Session
Part Number:AM3358
I am working with the BeagleBone Black, based on the am3358. I am using GNU Arm Embedded Toolchain Version 7-2018-q2-update, OpenOCD 10.0.8, and a Segger JLINK adapter.
I"ve built both the bootloader and gpio examples for the beaglebone black from the starterware 2.00 package. The files have been loaded to the SDCARD, per the user guide and the LED is flashing. The software side is good.
To familiarize myself gdb/openocd along with TI's code approach to initializing the chip, I want to follow the known, working code. After starting up openocd and gdb, I issue a "monitor reset halt" and then a "break *0x402F0400". As I understand it, the Public ROM reads the SYSBOOT pins and then searches the SDCARD for MLO and then the app file (BBB default boot config). The Public ROM copies the MLO to address 0x402F0400 and starts execution from that address.
As it stands now, gdb is not breaking at that address. After issuing the "continue" command, the LED starts blinking right away. CTRL-C drops me at a program counter somewhere in the 0x8000000 area where the gpio app itself is located. I am unable to stop the CPU at the beginning of user code, after the Public ROM has done its job.
Any ideas as to the steps to start the debugging session after the Public ROM has done first stage initialization and copied the user code to the internal SRAM??
Also. I did "load <...>/boot.out" from gdb. I am able to step through the code like a regular gdb session. However, the bootloader reaches a point where it says it can't find the SDCARD over the UART console. I suspect that even though the chip can execute the code from the load command, the chip is not in a state consistent with how the Public ROM would have initialized it. Another reason I want to stop right after the Public ROM has finished its job is to review the state of the chip at this exact point. I want to confirm that I am reading the Technical Reference Manual correctly.
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Procedural question - "TI thinks resolved"
While it hasn't happened to me, I've seen and sometimes participated in threads where a TI person posted the first reply, marked it "TI thinks resolved", and then never visited the thread again - even though subsequent discussions in that thread clearly show nothing was resolved. This appears to be happening with increasing frequency. Once a thread has that "thinks resolved" entry, does it disappear from whatever "pending" list the TI people are working with? If so, and if the original poster doesn't think it's resolved at all, how does he get it opened up to TI participation again? Should he start yet another thread on the same subject?
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CC1190: CC1200 - CC190
Part Number:CC1190
Hello
I am designing the CC1200-CC1190 for both 868MHz and 915MHz. There will be separate channels for 868MHz and 915MHz.
On the links given above I found a two reference designs.
After testing, the output power is about the same at input.
What is output impedance of CC1190, before 50 ohms adaptation ?
Do you have a complete schematic ? What about with TRX_SW signal ?
Thanks
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TPS3808: TPS3808G12DBVR
Part Number:TPS3808
I've inherited a previous design topology that had a 49.9K pull-up on the CT input as well as 20nF capacitor to ground. What will be the effect on the delay timing? The resistance alone provides 300 mS while the 20 nF should provide 114.78 mS. Can the effect be calculated?
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TPS62177: Use of the sleep pin
Part Number:TPS62177
Hello,
I have a question regarding the use of the "Sleep" Pin for the TPS62177.
In the datasheet I saw that if a high current is pull when the device is in sleep mode, as a safety feature the device return to normal operation automatically to avoid a complete collapse of Vout.
It is then wrote that this is not a recommanded operation mode to let the device wake up automatically. So i understand that we need to "pilot" the sleep pin to avoid that "safety feature".
The questions is :
- Do you confirm my understanding above ?
- What is the risk to only use that safety feature to go between sleep and run ? (in fact to let the sleep mode activated)
Thanks a lot,
Best regards
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IWR1642BOOST: Possible to extend people counting demo with direction detection?
Part Number:IWR1642BOOST
Hello,
I am already using the people counting demo on my ES2.0 device and was able to extend it with a counter for the total number of people who passed through a defined area. Now I want to count the number of people and their direction, as you suggested in one of the mmW videos. I already tried different approaches but nothing worked out.
Do you have any good solutions for my Problem?
Best regards
Patrick
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WEBENCH® Tools/LM5022-Q1: what is the optimal slope compensation for boost DC/DC with duty cycle larger than 50%
Part Number:LM5022-Q1
Tool/software: WEBENCH® Design Tools
Hi experts,
I came to this forum for help again. I'm designing a boost circuit with LM5022-Q1, 12V+-5% input, 54V/2.4A output.
I copied part of page12 of datasheet below, it says the optimal compensation is proportional to inductor current during MOSFET off;
In page21, there is a formula to calculate the Rsns, from it I can find the ratio to plus (Vo -VI)/L is 3D/fsw = 3DT, is that right?
If so, why does this value is used here, can I use just 1, or 1/2, or other value?
Thanks
Chris
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TPS65721: TPS65721 charger doesn't work
Part Number:TPS65721
Hello,
Were are using the TPS65721 for the first time in our project and we need to charge a LIPO battery with it. For now, we are not interested by the DC/DC, LDO or GPIOs functions.
We have developed a small PCB to test the charger and we have set the TPS65721 like this :
So we are just want to test the charger bloc :
- 5V on AC input
- LIPO battery on BAT pin
- 1K on ISET
- 10K on TS
The chip start and we can communicate with it via I2C, read and write into registers. But the charger won't start when we put a Lipo on BAT pins.
When have checked the 1 register and saw that the charger is enable and the power source is good.
The temperature is also good, so the charger is not in temperature protection mode.
But charger won't charge the battery.
If someone have an idea about what's going on... Thanks :)
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CCS/CC2650: getting timestamp of CC2650 Sensortag and send it togehter with the sensor data
Part Number:CC2650
Tool/software: Code Composer Studio
Hi,
I am using the CC2650 SensorTag and Iamreading out sensor data which is sent via BLE to the pc. I would like to add the timestamp to every single measurement and I was wondering how I could do that. Iam using the cc2650_sensortag project. I read some threads in the forum telling to give a look in the CC2650 User Guide, but I was not able to find the relevant information. Is it possible to get a timestamp for every measurement?
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RTOS: Pad Control PULLUP/PULDOWN with GPIO
Tool/software: TI-RTOS
Dear TI team,
I lik eto change the Pad Control PULLUP/PULDOWN with GPIO
i tried to do this with this code
++++++++++++++++++++++++
GPIO_PinConfig gpioPinConfigs[] = {
GPIO_DEVICE_CONFIG((GPIO_USER0_LED_PORT_NUM + 1), GPIO_USER0_LED_PIN_NUM) |
GPIO_CFG_IN_NOPULL | GPIO_CFG_INPUT ,
++++++++++++++++++++++++
also i tried with
TiPinMux v4
but it dosn't work
could you please suggest me a solution for this probmen.
Best Regards,
Azaam
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TMS320F28379D: control card J9 issue
Part Number:TMS320F28379D
Hi
I had F28379D control card and I need EMIF, SPI peripherals. The datasheet show me it in J9 like picture below as
I never see this connector.
What kind of connector should I have?
Is this like FPC 0.5 30P connector?
Another question. Does controlSUITE have example code to drive J9 peripherals?
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