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Questions tagged [nxp]

NXP is a manufacturer of semiconductors, both ICs and discrete components.

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56 views

MCP25625 SPI MISO Not Responding

As per title, I'm trying to send a simple 'READ' (0x03) command to the device and get the contents of the CANCTRL register (0x0F). I even moved past our project board and bought Microchip's ...
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44 views

How can I wire a microusb to a MIMXRT1062DVL6A?

I've never touched a barebones microcontroller before. I've been toying around with an Arduino and Teensy for a few years now. Recently I've been itching to ditch the comfort of those buttercup ...
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121 views

LPC-Link2 Not Working as CMSIS-DAP with OpenOCD

I'm working on a project with the NXP LPC824 using VisualGDB and OpenOCD. Using the LPCXpresso824-MAX dev board I had no trouble programming and debugging using OpenOCD. I am using the version of ...
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2answers
274 views

STM32 firmware upgrade (In-System Programming) over USB?

There are many ways to program an STM32 chip (in my case STM32L4R5): USB DFU mode (using DFuSe utility from ST) UART Serial Port (through something like FTDI chip)...
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104 views

NFC antenna connection to ground midway through loop

I'm designing a PCB etched NFC antenna. I'm confused about a design element I've seen in several production boards. I haven't seen this element explicitly discussed in any app notes or design guides. ...
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14 views

Regenerate IRK for NXP QN9020 Bluetooth Low Energy Peripheral

According to Bridging the GAP: Bluetooth LE Security Part 3, IRK Re-generation Each time you clear your peripheral’s bonds, and open it up to a new pairing, you should re-generate your IRK. ...
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38 views

Flashing firmware onto NXP QN9020 via SEGGER J-Link

Here I am attempting to flash the firmware using SEGGER J-Flash Lite. Below is the ouput when attempting to connect via the SEGGER J-Link Commander. ...
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1answer
104 views

SD Card formatting in FAT 32 file system

I am using NXP Micro for interfacing microSD card with FAT32 file system. for implementation I am using drivers located at below link. https://embedded-code.com/source-code/memory/secure-digital-mmc-...
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17 views

Replacement for NXP LPC92A1 FDH

I have developed a project in LPC932A1 FDH and only the HEX code is with me now. Unfortunately the part is not available in the market but P89LPC932 is available. Can I use the old HEX file in the ...
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74 views

Building NXP QN9020 firmware on GNU/Linux?

I just inherited a project that is based on the NXP SDK samples, (not quite sure which one). It is currently being built with µVision 4; but I would like to convert the build system to use ...
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1answer
74 views

NTAG213 Not being picked up by the RC522 Module

I have been using the RC522 module to read and write things to the tags it came with. But when I tried to use an NTAG213 I bought for a recent project it will act as if it isn't there. I've tried a ...
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152 views

Mcu keeps reseting because of noise

I have a circuit in which there is a mcu lpc1768 and a gsm module sim800l. For power I use DC/DC converter and made a 4.2v using lm2576 for sim800l. Used that voltage, I made a 3.3v using ams1117 and ...
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31 views

Freescale HCS08 PWM

I am using freescale HCS08sg8 Micro controller. here am set a fixed period and different duty cycle. My problem is first pulse width is higher then the other pulse width. am using code worrier V6.3 ...
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110 views

Can we store hex data through UART into flash and RUN it from that particular location

I am trying to store my hex file in another sector of the flash memory i.e (0x00050000) I want to store a hex file at different sector of the flash and to change the execution point to that address ...
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94 views

LPC1768 internal RTC time register is not incrementing

Value is read right,but time is not incrementing. ...
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0answers
182 views

COG PFC2119x driven LCD Display: Add custom characters, can get it to work

Story (skip if you want) Last week I received two malfunctioning DAB radio's from the 'brand' Tesco (type DR1551W) for free and because I cannot fix the problem with these units (missing service ...
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2answers
53 views

How to enter into ISP mode through 'reinvoke ISP' in LPC1759

In LPC1759, I entered ISP through "reinvoke ISP" with the following steps Disable PLL Reset timer 1 Re-map interrupt vectors Set watch dog timeout Reinvoke ISP After entering into ISP, What exactly ...
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25 views

Does CodeWarrior IDE support software debugging of MCF51JM128?

IDE -CodeWarrior Microcontroller-MCF51JM128
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1answer
178 views

Equivalent Series Resistance of 13.56 MHz RFID Antenna

I am designing a system that uses the MFRC522 by NXP Semiconductors and I am having a bit of difficulty designing the antenna. NXP provide an antenna design guide under the application note AN1445 ...
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38 views

What is the maximum supported I2C mode in the FS32K146?

In the S32K146 user-manual guide, it is mentioned as High-Speed mode is not supported by this device. (Page 1481). But in the coming section of the user-manual it is mentioned as device support HS ...
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1answer
231 views

What are the possible boot modes in the S32K146 (NXP S32K Series MCU)

I have been investigating S32K146 MCU boot modes and possible mode selection options. I am interested to know the possible boot modes and how it can be set up. From datasheet (Page -92): It can be ...
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97 views

NXP LPC-Link 2 hangs when flashing and debug

im using a JTAG probe NXP LPC link 2 , with IAR Embedded workbench and procesor LPC1766. for some reason when i compile and try to load either a debug or release firmware onto the LPC1766 , it works ...
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37 views

TWR-VF65GS10, how to programm? [closed]

We have a task to design IEEE 61850 compatible board. So we considered several options for MCU for the board: stm32f7xx series or something more powerful like NXP MVF6xx series or Sitara AM3358 series....
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1answer
91 views

KTY82/220 Temperature sensor terminals

I wanted to use NXP KTY82/220(https://www.nxp.com/docs/en/data-sheet/KTY82_SER.pdf) temperature sensor for my circuit. But I could not see which are the terminals for Vdd, GND and Analog Out in ...
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3answers
140 views

Accelerometer MMA8451 issue

We at my company, has a very strange issue regarding til MMA8451. We are experincing that our accelerometers data can be suddenly wrong over time. We have approximately 250 devices out, running in ...
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33 views

Writing 32 Bit Data value SPI NXP K66

How would I send 32bit data values using SPI of K66.. here is my attempt. The problem is only some parts of the 32bits are shown in the scope ...
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1answer
110 views

Debugging SPI problems on NXP K66

I'm trying the sample provided by K66 SDK from NXP and it doesn't work at all. I attached a scope and monitoring the data that is transfered from the uC to the slave but nothing is there. I have ...
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1answer
63 views

i2c probe happens only alternatively

I have connected a NXP NFC Module (pn7120) over I2C to i.MX6 Board. I tried to check whether the device is detected in the i2c probe command. It didn't detect in the first call, but got detected in ...
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1answer
872 views

i2c read error but probe succeeds

Can you please tell me a scenario where i2c probe gives the slave address but i2c read command fails..
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2answers
71 views

How is a NFC “connected tag” different from a full blown NFC reader?

I have played with NFC in the past, but those were full blown "NFC readers" based on NXP pn53x chips. I want to know, how is a so called "Connected tag" different from NFC readers? I found this chip ...
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1answer
219 views

LPC1343 double pin functions

I was looking to create a LPC1343 development board, but I noticed something odd. If you look at the pinout for this MCU you can see double functions for some pins. This is common, so you can program ...
1
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1answer
181 views

smart card clocking using NXP

In my current project, I'm trying to implement a smart card reader using LPC1788 which has a built-in smart card interface. Smart cards use the ISO7816-3 standard to communicate with the outside world....
1
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1answer
182 views

Power on reset and watchdog signal combination question

I'm working with the i.MX RT1050 processors and designing a POR circuit. I found the following circuit in the reference design but I don't understand how it's meant to work. The UM805RE is a voltage ...
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2answers
302 views

FatFs f_write not working in LPC1788 Timer ISR

I’m using LPC1788 MCU with KeilV5 compiler. I Have a Timer ISR in which I read a value form specific ADC channel and write it into a SD-Card using FATFS library. Here is my Timer ISR code: ...
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1answer
195 views

Send serial data to a specific Zigbee Node with HA (NXP Zigbee HA)

I have a Zigbee End-device based on JN5168 from NXP I want to release it as a lock that is battery powered. Apart from accepting the HA lock cluster commands, I need to send some custom data (some ...
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1answer
119 views

ethernet connection of nxp processor [closed]

ı designed a circuit schematic by using altium designer to ethernet connection of my processor (nxp lpc43s50fet256) ı added a circuit schematic as altium designer file .You can see my complete ...
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1answer
45 views

Lpc 43s50FET256 processor and its connections

ı want to buy a nxp LPC43S50FET256 processor and ı made some research but I dont know whether lpc43s50 has already got bridge connections, ı also dont know for example whether ethernet is already ...
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1answer
55 views

Pressure sensor port as vacuum means?

Pressure sensor used in my project is MPXV5010DP. Here is the datasheet In the datasheet, It is noted that port-2 should be kept as vacuum. What is mean by vacuum? Should I have keep port-2 as open ...
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1answer
602 views

Not getting proper acknowledgement and stop condition on I2C bus

I am trying to communicate Kinetis K60 tower board with a Cypress IC CY8CMBR3116 cy8320 development board as slave IC. There are only two devices on the I2C bus. I am attaching a snapshot of the ...
3
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2answers
547 views

Function of solid plane in the NFC antenna

Below picture shows 2 NFC antenna designed by NXP for their NFC chips . As you can see there are square planes in the middle of antenna,these planes have no Nets(does not connected to any where ). ...
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0answers
384 views

RS485 half duplex communication problem with K64

My board has a K64 NXP controller with half duplex RS485 comm., as shown here: It is installed on a big machine with lots of other electronics/mechanics going on. I have 2 boards on the machine. Each ...
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1answer
67 views

What is the relation between DAC peripheral bus and conversion/settling time

Going through the datasheet and the LPC17xx user manual, what is quite evident is how to select the various clocking options for the peripheral clock divider, i.e: ...
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2answers
340 views

C programming syntaxes for NXP LPC1768

My question may seem weird, but I am very new in nxp micro-controllers. It seems to me that people use different syntax in C programming. For example, in order to set a pin as an output we have: <...
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1answer
88 views

How much embedded program memory in this NXP (aka freescale) KL03 processor?

Is there a way to find out how much programming memory is in an NXP (aka freescale) KL03 ARM processor? The markings on the chip say "P03T5V" and "PSABA". There is this NXP package number lookup web ...
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1answer
326 views

How to get I2C to shut up while waiting for data in master transmit mode on LPC1114

I have an LPC1114(FN28) that I am writing some code for. Currently I am trying to provide an asynchronous view of the I2C interface to my code (the chip has a built-in I2C controller). The controller ...
1
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1answer
499 views

GPIO speed in LPC812 Cortex-M0 MCU from NXP

Based on datasheet page 17: GPIO registers are located on the ARM Cortex M0+ IO bus for fastest possible single-cycle I/O timing, allowing GPIO toggling with rates of up to 15 MHz. And I used a ...
1
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1answer
106 views

How do I calculate maximum current that each pin of PC8575 is able to sink?

http://www.nxp.com/documents/data_sheet/PCF8575.pdf Can somebody tell me which parameter one should look for while looking for calculating maximium Current source/sinked by a pin.
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1answer
87 views

LPC4088 - pin no. 1

I am dealing with LPC4088 microcontroller and I have a problem because I am not sure where is the pin no. 1. In the documentation it says there is a dot to index the pin: But in reallity it looks ...
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1answer
444 views

MC68000 Modern Equivalent (or can/should I use NRND/EOL chips)

I am designing a SBC that will feature the Motorola 68000 (or one of its descendants) but am having trouble finding new chips. The only chips that I have been able to find on Mouser or Digi-Key are ...
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1answer
431 views

LPc11u68 Recognized as an USB mass storage device even when programmed in HID class

When I connected a newbie LPC11u68 to USB port,it recognized in windows as an USB mass storage device.When I programmed LPCOPEN HID example by Flash magic to it,after resetting the board,my PC can't ...