Microchip Technology is an IC manufacturer, best known for its extensive range of PIC microcontrollers, but also memory and analog function ICs. The term "microchip" is a legacy term for integrated circuits, not just ones designed by Microchip Technologies. The company came into existence and took ...

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How to setup a usb Host device

How can i setup a usb host device with pic32MX795 with a pendrive as a device . I have been able to detect the pendrive and enumerate it partially , but cannot create a file on the pendrive . I am ...
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1answer
48 views

Regarding Microchip XC8 compiler's registers and bits definitions

I'm going to take a random 8-bit Microchip microcontroller: PIC16F887. Let's have a look at how the XC8 compiler (and the HI-TECH PICC, for that matter) is defining a register and its coresponding ...
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79 views

Can't identify chip [closed]

I've done extensive research trying to figure out what the original use was for a series of small RCA chips. They are approximately 1x3" and marked XEX1 and a 9 digit number on the left. I have looked ...
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4answers
267 views

is it true that a computer will slow down after it is used for a long time?

Intel claims that a computer will become slower after it is used for a long time while the power consumption remains almost the same according to some media source. At first I thought this was just ...
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3answers
71 views

How to do a specific task after some time

I have to switch on one relay after some specific time, but at same time I have to do continuous polling for controlling other relays, I am already using interrupt for multiplexing purpose (7 segment ...
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1answer
29 views

How to Prevent continuous switching fluctuation?

I am designing a digital stabilizer ,I am using ADC feature of Micro controller to sense incoming voltage and processing output through an AUTO Transformer .The code is like ...
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1answer
81 views

Micro Converter with ADC/DAC peripherals

I bumped into an interesting device ADuC841. It seems to be a microcontroller with extensive ADC/DAC peripherals. Since I am not experienced and did not have to use combination of ADCs and DACs, going ...
2
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1answer
56 views

PIC24 Open-Drain Config for 5V PWM Operation

I'm running a PIC24HJ series processor with a supply voltage of 3.3V. I need my PWM signal to be 0-5V, not 0-3.3V. Can I simply connect the PWM line to a 5V supply with a pull-up resistor? Or do I ...
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94 views

Obstacle detection using an ultrasonic sensor and a PIC microcontroller

I'm trying to detect obstacles at a specific distance using an ultrasonic sensor which is interfaced with a PIC micro controller. Ultrasonic sensor = HC-SR04 PIC micro controller = PIC16F628A ...
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1answer
70 views

How to update MCU bootloader?

I'm using a template USB HID bootloader from microchip\mla\v2013_12_20\apps\usb\device\bootloaders and have made some basic modifications. I don't have a strategy to be able to update the ...
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2answers
109 views

Eagle library for MCP2551

I need to make a PCB, and the only software I have is EAGLE. All the other parts are listed in my libraries, but where can I find a library that has MCP2551 (CAN transceiver)?
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5answers
270 views

Object detection using sensors and then reporting the location

I am trying to prototype a sensor + location reporting chip that will do the following: Sense if a object is present over the top of it (a vehicle to be specific) Reporting the location of the chip ...
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1answer
90 views

header file and register configuration settinggs for MSD usb implementation using pic18f4550

I want to implement USB mass storage device class as well as the human interface device class, the controller I am using is the PIC18F4550. since I am very new to microcontroller, can anyone please ...
2
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1answer
62 views

Using PWM to generate analog output

I am trying to understand this application note from Microchip about using PWM and a low pass filter to generate an analog output. I have a few questions regarding to the article: In the example ...
2
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1answer
123 views

What is the difference between an I/MM, E/MM and H/MM package?

I'm looking into the PIC18F25K80 as a new microcontroller for my company, but ran into an issue with supplier quantities. The PIC18F25K80-I/MM-ND that I originally selected seems to be very hard to ...
2
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1answer
88 views

RJ45 ethernet stick [closed]

Does any kind of RJ45 sticks exists? By RJ 45 stick, I mean anything that contains electronics and is small enough to be supported only by the RJ45 connector itself... and connects to the network. ...
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1answer
43 views

PIC24F read-after-write (stall case)

Device: PIC24FJ256GB110 I am not getting the highlighted part. Why it is "Allowed"? The reference manual says: Read-After-Write Dependency Rules If a working register, Wn, is used as a ...
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1answer
74 views

Further to PWM DAC Explanation

Refer to this question I had asked a few days back: PWM DAC Filter explanation Hi, It is getting extremely difficult for me to create the PT0 and PT1 signals as given above. I am using a dsPIC30F ...
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2answers
54 views

How to feed RFIN pin of HCS500?

I am trying to make a prototype receiver based on HCS500 Keeloq decoder IC. However, I'm not sure what to feed with RFIN pin? Should I just put antenna or data from standard ASK/OOK decoder, which ...
2
votes
3answers
214 views

How frequently must Microchip's USB HID USBDeviceTask() Task run?

I'm integrating the example USB module into my existing app and can only get it to work when I disable interrupts. I'm working off the mla example installed at the path: ...
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1answer
190 views

MicroC rs-485, pic16f887 String sending problems

How can I send the string "test" from a master pic to a slave? I'm using MicroC RS-485 library example: http://www.mikroe.com/download/eng/documents/compilers/mikroc/pro/pic/help/rs-485_library.htm ...
2
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0answers
89 views

pic24fj128ga310 uart not working in application, but works with PuTTY

I'm trying to connect a PIC24FJ128GA310 mounted on an Explorer 16 board with an embedded wireless module. I have been able to set up both to communicate perfectly well with PuTTY (an equivalent to ...
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1answer
68 views

Getting 5V Output on FT245RL

I've got Sparkfun's FT245RL Usb to Fifo Breakout Board. I need 5V output from data bit ports(D0-D7). While I'm working with it, I've found out I need to unsolder SJ1 jumper between Vcc and Vccio then ...
2
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2answers
145 views

What are the Pros/Cons of using an OTP vs a masked chip?

I work for a toy company and to date all of our electronics have used masked chips. This incurs a chip masking charge and a lead time of 45-60 days to mask and manufacture/program the chips. Recently ...
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2answers
139 views

Scripting to automate projects with microchip tools

IDE: MPLAB IDE 8.87 Compilers: C30/ASM30 Debugger/Programmer: MPLAB ICD 3 Windows 7 Question: I have utility projects such as clearing an EEPROM on custom hardware, retrieve data from an IC, and so ...
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1answer
61 views

dsPIC33EP DMA configuration issue

I am trying to buffer 8192 words of data from an IO Port to RAM using DMA hardware of dsPIC33EP512GM710. I have configured the interrupt source INT0 as the source for the DMA hardware. I am using ...
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1answer
134 views

What is the function of the given IC?

Which Type of IC is this one ? what is its function
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3answers
154 views

What does FCY / F_CY stand for?

I've come across many equations in microchip datasheets that are based on this value and am looking for a central place to lookup definitions. F_OSC = oscillator frequency T_CY = 1 / F_CY = time to ...
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2answers
160 views

How to properly wire 2 CAN transceivers to the same CANH and CANL

I'm attempting to design a system with 2 CAN transceivers, a High speed and Low speed that use the same CANH and CANL lines, like so: I was planning on using 4 MOSFETs or 4 Relays connected to the ...
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1answer
50 views

Changing Reference Voltage A/D on Microcontroller

I am using a microcontroller PIC18F4550. It has a reference voltage from 0 - 3.3 volts for the A/D converters. I had two questions: 1) If the voltage drops below 0 (negative), will the A/D ...
3
votes
1answer
115 views

How to find cause of reset in PIC16F microcontroller?

I've worked with other microcontrollers that have a register that I can check on powerup to check a register that contains debugging information on the cause of the reset. Initial searching revealed ...
0
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1answer
183 views

PIC16F628A 16x4 LCD problem while using MPLABX

I'm trying to connect a 16x4 LCD with a PIC16F628A, but I cannot get any response on the display, the display is blank. I put on a LED for indicating whether the time was right, and apparently ...
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1answer
221 views

What's the difference between minimum feature size , transistor gate length and half pitch?

I've been looking into the limits that silicon based transistors. During this I've come across several terms describing the small size of a transistor, minimum feature size and transistor gate length ...
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1answer
73 views

Moore's law: relationship between transistor count on an integrated circuit and minimum feature size

I'm doing a project about Moore's law, looking at physical limits of the technology / materials we're using (photolithography for example), the limit you'll come to is the minimum feature size. For ...
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2answers
44 views

Energy meter design/mcp390x

I am considering the mcp390Xa series for a energy meter project. What I am not understanding here is where the voltage part of the watt calculation is happening. Is this up to the micro to measure ...
0
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1answer
124 views

L293DNE Always On

I am hoping to put together a circuit that will control a slot car track from a 30V 3A power supply. I have used the L293DNE as I thought it would cope with the extra load. The circuit is based on ...
2
votes
2answers
105 views

How to find a datasheet for a part that doesn't exist on the manufacturer's website?

While bored recently, I decided to take apart a few old pieces of electronic equipment and attempt to reverse-engineer them. I've been doing pretty well, but I've come to an IC that I can identify ...
3
votes
2answers
96 views

How to make AC signal's level proper for MCU input?

I'm working on a frequency counter coursework, where I use MSP430 MCU. I have to measure signals with specifications: frequency from 0.1 Hz to 1 MHz and signal's amplitude from 0.1V to 10V. The ...
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1answer
152 views

Can i use another H-bridge for this bipolar stepper motor drive?

I am driving a bipolar stepper motor with a H- bridge. For this sheet: source Can i use my L293DNE H-bridge driver instead of the pictured SN754410NE? Will there be any consequences for this? I ...
3
votes
1answer
164 views

7-bit data mode in bluetooth module rn-42

I have bluetooth module rn42 I need to configure it to 7-bit data mode. Data sheets says that I should use command S7,1 to enable 7-bit data mode, but it does not work. I receive ERR when sending s7,1 ...
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0answers
94 views

Oscillator initialization with dsPIC33F

I am trying to initialize my dsPIC33F to work with external 24 MHz clock. I am getting a strange problem when I am trying to update CLKDIV register. The Mplab says that the parameter is incorrect ...
5
votes
4answers
2k views

ICD3 + PIC + MPLAB: Target Device ID 0x0 does not match expected Device ID

We designed a board with a Microchip PIC24HJ256GP610A on it. We've successfully used an ICD3 to program and debug the PIC on the Explorer 16 development board. We think we've followed the design ...
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2answers
793 views

I2C on PIC12s using MPLAB x (win7) and XC8

I am from a programming background, but very new to microcontrollers. Pardon me if this question is very basic, or doesn't make complete sense. I'm trying to bootstrap my knowledge, and the learning ...
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1answer
81 views

Microchip, memory measured in IEC?

It doesn't say on the data-sheet, but I'm curious where i can find if Microchip uses IEC or SI as standard for there memory sizes. For example: ...
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1answer
302 views

dsPIC33 Simple External Interrupt problem

This will be laughably easy for someone who has worked with the dsPIC33 and XC16 compiler, but has already cost me a day. Hopefully someone can save me any more wasted time! Could someone please tell ...
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1answer
64 views

Static Parameter in Pic32 [closed]

I am developing for Pic32 platform. I want to know how I can declare static parameter knowing that this parameter will be used all over the file in my application. I have tried using static like this: ...
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0answers
207 views

ADXL345 interface Pic16f877a

I have tried following code. Works absloutely fine until i see all values of X, Y and Z to be -1. No effect on tilt or anything VCC = 5V Chip Select is connected to uC SDA and SDL are connected to uC ...
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0answers
26 views

I2C pic32 slave with two address [duplicate]

I'm developping for a pic32 plateform. My application consists to realise I²C communication between µC 8051 and PIC32. The 8051 is the master and the PIC32 is the slave. I have established a I²C ...
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0answers
328 views

PIC32, USB CDC + HID Composite Device fails with Code 10

I've been busy building a CDC + HID composite USB device for the past couple of weeks, and stuck with This device cannot start. (Code 10) error in Windows 7. When looking at the device through ...
5
votes
2answers
266 views

How are microchips designed?

I was just wondering how the microchips are actually designed. I was watching the Apple presentation on the A7 chip and they were saying there is over a billion transistors on the chip. To my mind, it ...