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

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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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46 views

How is programming done on a NXP MC9S08? [duplicate]

I am wondering how a NXP 8-bit microcontroller unit is programmed? Is there any kind of programming unit such as an AVR ISP MKII (for atmel) or a ST-Link (for STM)? Edit: I would also like to know ...
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45 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 ...
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2answers
58 views

NXP arm microprocessor memory erase - no JTAG

I am fiddling around with NXP LPC2368. Recently changed the PLL clock control registers, and as a result JTAG stopped working, so I am unable to program or erase the chip. My question is, is there ...
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56 views

MISRA C 2004 rule 1.1 error

I am working in IAR complier and using MK24FN1M0VLQ12 processor for my project. I want to eliminate the Misra errors generated by processor oriented .h and .c files. Currently I am using #pragma to ...
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54 views

Error in LPC datasheet?

I was comparing the datasheets for LPC11XX and LPC176x datasheet, specifically referring to the Count Control Register. The LPC11XX datasheet mentions (third paragraph of article 20.7.11 on page ...
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1answer
56 views

SD Card Reader with LPC43xx

I am trying to implement an sd card reader on lpc43xx devices. For this I can make use of the LPCopen examples that use the ROM based drivers. However for some reason the ROM based driver example ...
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2answers
67 views

UART is acting weird

I programmed UART3 peripheral on LPC4088 to send a single unsigned character posiljka over Tx line. This is done by continuously copying this character into the ...
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1answer
27 views

LPC1110 confusion about default system clock and uart baud rate

I'm trying to get acquainted with ARMs on example of LPC1110 device. And there is some confusion about selecting baud rate for UART. I suppose it is running at ...
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2answers
41 views

Why is Vtyp less than Vmin on a CMOS chip

Regarding the chip 74HC08 On the table describing Static Characteristics (Section 9). Why is the typical VIH lower than the minimum value. And vice versa for VIL
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2answers
394 views

Output clock of the LPC1768?

I am using NXP's LPC1768 development board and I came across the User Manual for this part and page 67/849 section 4.10 descusses the External Clock Output. I couldn't figure out which pin out of the ...
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192 views

SDXC Card Reader with LPC1822

in my application I have an SD Card reader using the NXP LPC1822 microcontroller. It works very good with all SD- and SDHC-Cards I've tested so far. Only thing that does not work is SDXC. I already ...
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1answer
37 views

NVT I2C bus capacitance

I would like to use NXP NVT20XX as bidirectional voltage-level translator in my system (I2C at 100kHz, 6 slaves) and I only don't understand one thing. I am little bit confused. In the datasheet they ...
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1answer
226 views

LPC43xx External Static Memory - Multiplexing of Address/Data lines

We would like to tightly-couple a FPGA with a µC by means of the external static memory memory controller, thereby effectively mapping the FPGA registers into main memory of the µC with maximum ...
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0answers
173 views

LPC2148 + Eclipse + yagarto + openOCD. Issue with the interrupts

I'm using 'Eclipse-Indigo' + yagarto + 'openocd-0.7.0' setup for a project on LPC2148. I've set up the environment properly. I'm able to compile, link and debug the project. I've configurred Timer0 ...
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1answer
415 views

Optimal configuration for PLL on LPC17xx

I'm trying to write an algorithm that would pick the best available PLL0 configuration for the user based on F_in and F_cclk. The manual says that I should pick higher F_ref if possible for a more ...
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2answers
767 views

Flyback SMPS Transformer choice

In several projects so far, I have been using old "fashioned" transformer based power supplies. However, this time around I want to use a switching mode power supply. The supply will be used to power ...
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2answers
170 views

LPC1343 evaluation board USB bootloader not working?

My LPC1343 no longer shows up as a USB mass storage device. I am using the following evaluation board for NXP's LPC1343: ...
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1answer
125 views

How to lower current consumption in JN5148-J01 Microcontroller?

I am using JenNet-IP stack and JN5148-J01 MCU for smart home application. As per JenNet-IP stack my MCU will not be in sleep mode because it is working as router in WPAN. But I have to reduce current ...
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2answers
350 views

What are the implications of a ROMLESS device?

I was looking through the microcontrollers area of Digikey and I noticed a device that i'm interested in although there is the description of "ROMLESS" in the program memory type. ...
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1answer
226 views

Does the LPC1343 MCU need an external clock for USB operation?

I am trying to design a board using the LPC1343: http://www.nxp.com/documents/data_sheet/LPC1311_13_42_43.pdf I would like to be able to use its on-board USB bootloader to program it. My question is ...
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1answer
479 views

Program LPC1343 thru USB bootloader with the right FILE format

I'm having a real hardtime programming my LPC1343 with the method mentioned in this question (Can an LPC1343 accept its initial program over USB?). I am using a Linux machine and arm-none-eabi-gcc. I ...
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2answers
423 views

Blocking wait for pin change on a LPC1114 microcontroller

I need to synchronize the rising edge of a PWM with another signal pulse's falling edge on a LPC1114FN28 (trying to drive a TCD1304DG), but am failing to achieve this so far. I have tried the ...
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1answer
622 views

Using a manufacturer specific Profile and Cluster on NXP JN5168

I am writing a ZigBee application on NXP JN5168 MCU. I would like to create a custom Endpoint with a custom Cluster defined by me instead of one from the ZigBee Cluster Library. Looks like I'm forced ...
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1answer
208 views

Help to fix custom CDC Send function

I am using a custom code of CDC example from 177x_8x_PDL_110602 package (I am not using LPCOpen). I am having a trouble with CDC_Send function. That is the scenary: An python script send messages to ...
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1answer
753 views

USB Stack for LPC1343

I was trying to implement a USB keyboard on LPC1343 using the ROM based HID driver when I came across some information on the internet which stated that the ROM based HID driver is very limited in ...
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2answers
110 views

Missing connection in amplifier example?

I've been staring at the datasheet for NXP's TDA1308 headphone amplifier IC for a while, and I'm just feeling confused. Their recommended application circuit (Figure 4 in the datasheet) looks like ...
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3answers
708 views

Synchronizing SPI ports for higher data rate

I am designing a new board which uses the NXP LPC4330 (Cortex M4 microcontroller) with a XESS Xula2 FPGA development board. In this design, the Xula 2 has limited I/O pins since it is designed to fit ...
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1answer
2k views

Does an SD card in SPI mode respect chip select/slave select? Seems to be resetting in my application

I have an application where I have a microcontroller (NXP LPC1343) which is connected to an FPGA via 16-bit SPI. There is also an SD card using the same SPI port (MISO/MOSI) but with a different CS/SS ...
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3answers
3k views

Consensus on proper wiring for Cortex M 10 Pin JTAG Connector

For the past few weeks I have been working with the new revision of my ARM Cortex M4 design that I posted about a month ago, thanks again to everyone who provided me with much needed guidance and ...
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1answer
707 views

USB 2.0 PCB trace design restrictions

Thanks to the help from this community I am much closer to finishing my new design. Right now I am most worried about my USB 2.0 traces, and I want to make sure that I am doing everything right with ...
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4answers
455 views

Readying a New Design, would appreciate som feedback

I designed a Arduino shield compatible board around the NXP LPC4337JBD144. so far I have been unable to get the first revision to program. In the first design the JTAG header was not setup ...
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1answer
2k views

How can I communicate between micro-controller and PC without the use of RS232/USB Adapter?

I use an NXP micro-controller, P89V51RD2, and use a RS232 to USB converter to program it. I'd like to communicate with the computer to send data but without using the RS232 adapter and convert serial ...
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3answers
794 views

How can I store audio files in the uC ROM so as to serially transmit it to a decoder chip?

I am using an NXP micro controller (P89V51RD2) with on board flash of 64kB. I want to interface it with an audio decoder IC, probably VS1011 (if I can get the IC). What should I do to use on board ROM ...
2
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1answer
332 views

NXP LPC1343 GPIO questions

I am an embedded SW developer who wants to get more familiar with HW design. I have an LPCXpresso board with an LPC1343 on it. I want to build some circuit around that. I thought I'll start by finding ...
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1answer
605 views

PN512 not starting?

I got a PN512 IC (NFC controller from NXP) interfacing with a MCU over SPI and ChibiOS. Everything seems to be working fine, i can read the registers and they returned value matches with the reset ...
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2answers
1k views

I2C EEPROM with non-standard address?

So I know that almost all i2c EEPROM ICs use 0xAh (or 1010) as the top four bits of the slave address. I currently have a 16 kbit EEPROM on my i2c bus that uses the lower 3 bits of the slave address ...
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2answers
286 views

How can I detect HIGH or LOW input on a NXP microcontroller?

I am using NXP micro-controller P89V51RD2. I need to detect HIGH or LOW from 2 single bits. How do I store input state to a pre-defined address so that my functions can detect it as data? I need to ...
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3answers
470 views

LPC1343 Firmware Loading - Change drive label

I have a system that is using the built-in firmware loading facility of the LPC1343. When the flash drive is mounted, the disk is always labeled "CRP_DISABLED". Is there a way to change the label of ...
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2answers
282 views

Expand RAM and flash on LPC2294

I have a project in mind. I want to buy an LPC2294 microcontroller, SDRAM IC, and flash IC (those IC's haven't yet been defined). What I want to do is connect those ICs to the microcontroller in order ...
5
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1answer
698 views

Can an LPC1343 accept its initial program over USB?

The LPC13xx datasheet suggests some clock setup is necessary to use USB. Does the chip's built in boot loader make it possible to load the initial program over USB, or do the clock multipliers have to ...
5
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1answer
3k views

Running a CAN sample project on LPCXpresso LPC11C24

The LPC11C24 has a on-chip CAN transceiver and a section of ROM with CAN driver software. I am trying to run the can_onchip sample project on the LPCXpresso board. ...
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2answers
324 views

Why are chips used in electronic identity cards?

Why did Germany choose NXP's SmartMX chip in the new Electronic ID Card (see here) instead of having a more conventional solution, like an old credit-card-like approach? In fact, the question is ...
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2answers
339 views

Reading a LPC2378 microcontroller [closed]

I can't get data off my ARM LPC2378 microcontroller - does it need UART or can any GPIO be used?