Infineon Technologies has introduced the industry’s first high-voltage microcontroller (MCU) with USB power delivery (USB PD) 3.1 support. The EZ-PD PMG1 (Power Delivery Microcontroller Gen1) is Infineon’s first generation of USB PD MCUs targeting any embedded system that provides or consumes power with high-voltage up to 28 V (140 W). The device supports higher power…
What is USB? UNIVERSAL SERIAL BUS What does it do?It connects your laptop or PC to the peripheral devices attached to it.How does it communicate?You attach the device using a cable to PC and communication is initiated within a fraction of seconds. However, what looks easy on our end is a complicated process in the USB system. It may be single step in our stride to attach the device and start working but for the system it’s entirely a different picture. In that fraction of second after the device is attached, it initiates step by step process to make communication possible. It starts right from alerting the PC about the attachment, change in voltages at ports, then addressing the devices, gathering the information, loading the drivers and finally communication. Let’s understand each of these steps in detail to get a crystal clear picture about the working of USB.
The purpose of this article is to explain how to interface a PIC microcontroller to a PC via the USB port.Although the concepts are universal, the examples are specifically for use with MikroElektronika’s ‘MikroC Pro for PIC’. PIC18F2550 and PIC18f4550 are famous for their USB Module. To stay ahead you can start with their datasheets.The most difficult part of this project is exactly what is required to get the PIC microcontroller to communicate with the USB port. The two most important things that absolutely have to be correct are the microcontroller configuration, and the USB device descriptor. If even the smallest thing is incorrect about either of these, communication will not occur.
Universal Serial Bus (USB) is a standard developed in 1990s with an intention to replace all the different connectors and ports with a single ‘universal’ industrial standard port and connector. Under the USB standard the communication protocol, cables and connectors are defined. The different connectors available under the USB standard are Type A, Type B, Mini A, Mini B, Micro A and Micro B.
Just like their name, Universal Serial Bus connectors, are unanimously used as a carrier in power and data exchange operations. Developed and promoted by computing giants like Intel, Microsoft, Dell, IBM and NEC, USB interfacing has been highly preferred to connect various computer peripherals. Mouse, keyboard, cameras, printers, scanners, laptop cooling pad, external memory are the prominent few names among a long and increasing list. Apart from computers, USB based connectors have also arrived in television, mobile phone chargers, multimedia players etc.
Nowadays mobiles can also be charged using the USB outlet of PC. The mobile charger circuit presented in this project can give 4.7V of synchronized voltage [[wysiwyg_imageupload::]]for charging the phone. As USB outlets can give 5V DC and 100mA of current. It is sufficient for slow charging of mobile phones so they can be used to charge the mobile phones. USB stands for Universal Serial Port. It is one of the latest methods to exchange information from PC to the real world. The USB port offers power to the external devices. +5V of power is available at pin1 and -5V of it is available at pin4. Most of the Mobile Phones battery are rated 3.6 volts at 1000 to 1300 mAh. These battery sets have 3 Lithium cells which have 1.2 volt rating. Keep on reading to find out how the circuit is constructed and how it works.
USB Flash Drives or commonly called as Pen Drives are popular removable storage media having a storage capacity up to 256 GB. They are preferred over the other conventional storage devices like floppy disks or CD ROMs as they are faster, smaller and have a longer life span. The internal circuitry of the pen drive draws power from the computer for its operation. They have an integrated USB interface to communicate with the computer. The important parts of the pen drive are USB connector, crystal oscillator, memory chips and a controller to interact with the PC. The pen drive used here has storage capacity of 4GB.
Serial communication with embedded project and computer has always been a big deal for the students in their project and professional in their work. So tried to work on that part and created an easy way for interfacing between PC and embedded system using PIC Microcontroller PIC18F2550 AND PIC18F4550.This tutorial provides the basic knowledge of creating small compact USB device interface between pc and embedded system and its controlling. You can control, moniter or implement data acquisition system using this tutorial