• PCA9685 LED Registers

    All: I am going to state an assumption - please tell me if I am correct.   Zero Max PWM LEDn_ON_L 0x00 0x00 0x00 LEDn_ON_H 0x00 0x10  0x00 LEDn_OFF_L 0x00 0xFF 0xWM LEDn_OFF_H 0x10  ...
    Todd Anderson
    last modified by Todd Anderson
  • Sharing Dif I2C Lines on the PCA9615 from I2C to GPIO/Analogue

    Hello.   I'm certainly developing an adaptable interface that can allow me to connect various devices into my system. At the moment  the interface types that can connect are: I2C Controller GPIO/Analogue:...
    Ben Williams
    last modified by Ben Williams
  • PCA9546A I2C MUX Bus Problem

    Hi, I designed this into a new product or ours.   I notice that the chip frequently results in an I2C bus stuck event that needs recovery.   This occurs when writing the control register for a MUX selecti...
    Bernt Damm
    last modified by Bernt Damm
  • MW7IC915NT1 device input and output impedance

    Hi Team, I am planning to use MW7IC915NT1 device in one of my design and planning to operate in 1025 - 1150 MHz to replace obsolete MHVIC915R2 device.   I didn't find input and output impedance inform...
    Raveendra Reddy
    last modified by Raveendra Reddy
  • PCA9685 Stagger + Fade

    All: We recently introduced "stagger" into the chip, by offsetting the LEDx_ON register by 256 per output channel. So LED0_ON has 0, LED1_ON has 256, and so on, until LED15_ON has 256x15 (=3840).   The problem...
    Todd Anderson
    last modified by Todd Anderson
  • PCF2129T  reset time register after power up

    Dear,   I am using your RTC, reference PCF2129T, in one board designed by us. I am connected VDD to 3V3 and VBAT to external battery.   After one power down of VDD and power up, I am reading the time regis...
    Fernando Alcaide
    last modified by Fernando Alcaide
  • PCA9615, ACK not appearing on Master side of bus, visible on Slave

    pca9615 Hi, We've recently attempted to add 2x PCA9615's between 2 PCB's in an existing system. One PCB includes a MLX90614 temp sensor which is the Slave device, and the other, an STM32F415 microcontroller (Master)...
    Daniel Librio
    last modified by Daniel Librio
  • SJA1105 Support Hairpin Mode

    Can anyone from NXP advise whether the SJ1105 Ethernet switch supports "hairpin" / VEPA mode?   This is helpful for some modes of macvlan networking, which you can see in the VEPA diagram here: Introduction...
    Kelvin Lawson
    last modified by Kelvin Lawson
  • compilation failure ls1046-linux-fs.tar.bz2

     hi, community,        I am compilation ls1046 evboard package, But the compilation failed! development environment: vmware workstation pro ubuntu 18.04 operating...
    lille li
    last modified by lille li
  • SCL I2C Frequency with MPC8569 in security full rate mode

    Hi all;   I am ussing a MPC8659 microcontroller with a 400MHz platform clock (CCB). I am trying to obtain 100KHz in I2C2 SCL apliying FDR=0X2F (2048) in I2CFDR (400MHz/2/2048 = 97656Hz) yet the SCL line have 190...
    Daniel Vaquerizo
    last modified by Daniel Vaquerizo
  • NXQ1TXH5 Coil

    Hello.   We are trying to develop a new product that will implement wireless charging technology and we are trying to follow the guidelines noted in the Qi specification. We have our eyes set on the NXQ1TXH...
    Natanael Espinosa
    last modified by Natanael Espinosa
  • Mutexes in A71CH not working!

    Hello everyone,   I am trying to use OpenSSL engine for the secure element  A71CH in a RaspberryPi 3, but I am getting this error:  SM_Connect failed with status 0x7012 (Could not open communication c...
    Hamdi Twahri
    last modified by Hamdi Twahri
  • I2C random no Ackowledge issue

    Hi ,   I have design a I2C hot swap circuit using PCA9617 (as a level translator for 3.3V to 5V and 5V is the Hot side on Backplane) and LTC4300-1 (At the Input Hot side of removable card). The pul...
    Vihang Waze
    last modified by Vihang Waze
  • Re: Supported operating systems of IMX6_L4.1.15_2.0.0_MFG_TOOL

    Hello.Can I ask additional question? Can I use MFGTool with the system that is Windows10 + USB3.0? Recognized by the device manager on WIndows10, but displayed as "No Device Connected" in the MFGTool application. Eval...
    takuroh yoshida
    last modified by takuroh yoshida
  • Re: PCA9617 I2C signals getting damaged during Hot swapping/Insertion

    For hot-swapping operations, you need a device with circuitry that precharges the SDA and SCL pins to prevent glitching data on an active I2C bus when the unpowered slave card is inserted into the backplane system. Un...
  • Getting started with Mifare

    Hi, I'm interested in developing iOS apps that interact with Mifare cards and trying to find developer "getting started" type of material with out much luck.   Could any one point me to any developer documentati...
    Naveen Mukkelli
    last modified by Naveen Mukkelli
  • BF862 or other low noise JFET

    Hi,   At the end of 2017 the BF862 JFET transistor got end-of-life. Currently, as far as I can find, the entire BF86x family has a "not recommended for new design" status. The BF862 was one of the lowest noise J...
    Tomasz Sztejka
    last modified by Tomasz Sztejka
  • Problems with ACR122U and TagWriter

    I was planning to use an ACR122U with NXP Tag Writer to showcase the use of NFC tags, but when I try to read a tag in TagWriter, I just get a beep, it sounds like the computer is "rediscovering" the hardware. And it ...
    Fleming Nielsen
    last modified by Fleming Nielsen
  • Freescale P2020 CPU Freeze over PCIe abort signal

    This is the head of a thread I started in Linux mailing lists. The thread can be found at: http://www.mail-archive.com/linuxppc-dev@lists.ozlabs.org/msg47595.html --------------------snip -------------------- This sho...
    Eran Liberty
    last modified by Eran Liberty
  • SGTL5000- DC-Bias on linein using codec bypass

    Hi!   the SGTL can switch Line-In to HP-OUT using "codec bypass". We want to use this mode.   Our Problem: The SGTL does not switch the line-in DC-bias voltage on, if this mode is selected, which sounds ho...
    Maximilian Gastager
    last modified by Maximilian Gastager