AT42QT1011 issue (Martin)
Helo, I made capacitive touch button based on the datasheet AT42QT1011. Module itself works well. When I touch electrode I get voltage on output pin.After I release my finger output voltage drops to...
View ArticleCan I replace MCP2562 by MCP2562FD without any modification (hardware and...
Hello Everything is in the title. Best regardsJulien..
View ArticleUSB Switch USB3740 (SR)
Hello,currently I am working on a design that uses a USB3740. From the datasheet I understand that it incorporates two analog switches. In the PCB layout I have to cross DP and DM lines on each port so...
View ArticleMCP 3561 (anoopjayaram)
I am using the ADC IC MCP3561 for my project.The configuration details are given below #define CONFIG0 0xE3 /*ADC Conversion mode, No current source is applied to the ADC inputs (default) Full Shutdown...
View ArticleTranszorb for MCP73831 USB LiIon Charger? (rolfo)
The datasheet of recommends a transzorb on the USB power input (VDD). Section 6.1.1.2. Absolute maximum ratings for VDD is listed as 7.0V plus 4kV human body ESD and 400V machine model ESD. On USB Vbus...
View ArticleMCP2221: TX voltage back feeding (Jujakarr)
Dear Forum, We use a MCP2221 USB-to-UART bridge on our board, with 3.3V LDO on VBUS to power it up.The schematics are attached... When a USB-cable is plugged, Pin5 (UTx) has 1.8V, which is back feeded...
View ArticleMCP3561- ADC interface (Anees PK)
Hi All,I am using ADC MCP3561 ADC to read the sensor input with differential input mode. used Cortex M4 controller. COnnected Positive analog signal to CH1 and the negative input signal to CH0 channel...
View ArticleMCP3561- ADC interface (Anees PK)
Hi All,I am using ADC MCP3561 ADC to read the sensor input with differential input mode. used Cortex M4 controller. COnnected Positive analog signal to CH1 and the negative input signal to CH0 channel...
View ArticleThe read value from ADC MCP3561R is not stable (Ihab88)
Hi All,I have a problem in the reading value from MCP3561R. I am using the internal reference and the internal clock for ADC operation. When reading the internal temperature sensor a range value +/-...
View ArticleUSB3300 Transmit problem (szoshi)
Hello, I am using a Waveshare USB3300 board with an Artix 7 FPGA. I have managed to get my initialization code up and running so that the PC recognizes that a device has been plugged in and tries to...
View ArticleMCP73213T: PROG Pin Voltage (Engr6543)
The MCP73213T-A6X battery charger is being used to charge a 2S1P 800mAh Lithium Ion battery.The energy to charge the battery comes from a mechanical generator. As this generator does not always...
View ArticleUSB4715 external flash programming (Bonelli)
Hello,I plan to use a SST26VF016B as companion memory for the USB4715 USB hub. The SST26VF016B is the SPI flash used in the dev kit.The hub configuration must swap some downstream and the upstream...
View ArticleUSB7216C with type C upstream (alex77)
Hello, For a new design, i am interfacing the upstream of the USB7216C with a USB type C of a system on module. Is there any hardware guidelines for the CC pins to use the Flexconnect to switch a...
View ArticleUSB7216C with type C upstream (alex77)
Hello, For a new design, i am interfacing the upstream of the USB7216C with a USB type C of a system on module. Is there any hardware guidelines for the CC pins to use the Flexconnect to switch a...
View ArticleHV56022 Gain issue? (RKRobinson)
Hi,I have a design incorporating a HV56022T. The datasheet states that the gain of the device should be between 72 and 78, nominally 75. However I'm measuring a gain of 65, for example and input...
View ArticleUSC2114 Power Switches spec (bezalel)
Hello, We are looking into using the UCS2114 in our design. We were looking through the datasheet and couldn't find how are the Power Switches (which are connected between Vs & Vbus) implemented....
View ArticleUSB3317 operation with Xilinx Zynq US+ (jt94096)
Hello, we are using Microchip's USB3317 PHY to implement a USB2 interface to a Xilinx Zynq Ultrascale Plus FPGA on a custom design. The ZCU106 development platform uses a USB3320 and we have connected...
View ArticleMCP3551: SDO/RDY never goes low (joelindo)
RDY never goes low to indicate that a conversion is complete. Here's how I'm connecting it on the bench,(includes recommended bypass caps (100n) on Vdd and VrefVref: 5vdcVin+: either GND, 3.3 or...
View ArticleMCP73833 stops charging and let the battery discharge (garageeks)
Dear all, we have a MCP73833-FCI/MF with DFN-10 package and RPROG = 4.7k that is charging a 1850mAh battery.The charger is permanently attached to input voltage and the load is always connected.On some...
View ArticleUSB4740B Mux Issue (KV89)
Hi,I am using the USB3740B multiplexer device for a USB 2.0 High-Speed Interface. My block diagram looks like that: USB-Type C receptacle-> two USB HS inputs connected to USB3740B -> one USB HS...
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