USB Standards Standard USB Speeds: Low-speed USB USB 1.1—-1.5 Mbps Full-speed USB USB 1.1—-12 Mbps Hi-Speed USB USB 2.0—-480 Mbps Super-Speed USB USB 3.0—-5 Gbps SuperSpeed USB 10 Gbps USB 3.1 Gen 2—-10 Gbps Types USB A—’normal’ USB interface Mini USB—for some cameras Micro USB—for some phones USB C—New interface model that plugs in in either direction. Quick Review Universal Serial Bus (USB) 1.1 comes in 1.5 MB/s & 12 Mbps; USB 2.0 runs at 480 Mbps USB 3.0 runs at 5 Gbps; USB 3.1 runs at 10 Gbps USB versions often use colors to indicate version USB connectors come in many types: Type-A; Type-B; Type-C; Standard; Mini; and Micro.…

Firmware What is BIOS/UEFI? BIOS programs are code. Basic Input/Output Services Note: Every motherboard in existence has built-in to it a small program designed to let us talk to the assumed hardware of the computer, and it’s called, ‘BIOS’. BIOS is a firmware, burned onto a chip, as opposed to software, which is copied onto some type of magnetic media or electronic media. BIOS programming enables interaction with the motherboard before the OS loads. BIOS is stored in non-volatile media, thus called firmware. POST (Power On Self Test) routines are built into firmware. The System Setup utility is also part of the firmware. (CMOS) POST—Power On Self Test POST runs…

The Visible Computer A computer gets work or play done. A computer will have a CPU, RAM, mass storage, & an OS. Primary PC Components System unit, Monitor (output), Keyboard & mouse (input), Printer (paper output); Speakers, game controllers, web cameras, external hard drives, headsets, microphones. External Connections USB, network cable connections (RJ45); DVI; HDMI; older: mini-din (PS2); Parallel port; serial port; VGA. Inside the PC What is a computer? What is an Operating System? A program that runs the other programs (the conductor). An OS controls all the programs on a computer. Kernel—the core part of the OS that handles the primary memory management. The core of the operating…

Safety & Professionalism Professional Communication, Part 1 Be on time Active Listening—avoid interrupting the customer Clarify Customer Statements Maintain Positive Attitude/Project Confidence Use proper language and avoid jargon, acronyms and slang. Set and meet expectations/timeline and communicate status with customer (managing expectations!!) Professional Communication, Part 2 Be culturally sensitive Use appropriate professional titles/greetings Avoid distractions when working with the customer (no phones, etc) Avoid being judgmental Avoid dismissing customer problems Deal appropriately with customers’ confidential & private materials Don’t argue with the customer or be defensive (or offensive, for that matter!) Follow up with the customer to verify satisfaction Provide proper documentation on services provided Offer different repair/replacement options Tools…