Overview and Connection Interfaces

This guide covers essential information for setting up and configuring mobile device accessories and ports.


USB (Universal Serial Bus)

Standard interface for connecting peripherals and charging mobile devices.

Key Terms:

  • USB Type-A: Traditional rectangular connector. Common on chargers and computers, supports USB 2.0 and 3.0.
  • USB Type-B: Square connector primarily used for printers and scanners. Less common in mobile devices.
  • USB Type-C: Reversible connector supporting highest data transfer speeds and power delivery up to 100W.
  • Micro-USB: Small connector common on older mobile devices and accessories. Limited to 480 Mbps data transfer.
  • Mini-USB: Legacy connector found on older cameras and MP3 players. Largely replaced by Micro-USB and Type-C.
  • USB Power Delivery: Protocol allowing higher power transfer (up to 100W) over USB-C connections.
  • OTG (On-The-Go): Feature enabling mobile devices to act as USB hosts for peripherals.

Note: USB Type-C is the current industry standard for mobile devices, offering the most versatile connectivity and fastest charging options.


USB Speed Standards:

Standard Speed
USB 2.0 480 Mbps
USB 3.0 5 Gbps
USB 3.1 10 Gbps
USB 4.0 40 Gbps

Lightning Connector

Apple’s proprietary connector for iOS devices, supporting charging and data transfer.

Key Terms:

  • MFi Certification: Apple’s licensing program ensuring accessory compatibility. Required for official Lightning accessories.
  • Lightning to USB Adapter: Enables connection to standard USB peripherals. Essential for expanding device compatibility.

NFC (Near Field Communication)

Short-range wireless technology enabling contactless communication between devices.

Key Terms:

  • Tap-to-Pay: Feature enabling contactless payments through NFC. Requires secure element for transaction processing.
  • NFC Tags: Programmable chips storing data for quick transfer. Used for automation and quick settings changes.

Bluetooth

Wireless protocol for connecting peripherals and sharing data between devices.

Key Terms:

  • Bluetooth LE (Low Energy): Version optimized for devices requiring minimal power. Common in wearables and sensors.
  • Pairing Code: Security feature requiring PIN entry for initial device connection. Default often “0000” or “1234”.
  • Discovery Mode: State allowing device to be visible to other Bluetooth devices. Usually time-limited for security.

Hotspot/Tethering

Feature allowing mobile devices to share their internet connection with other devices.

Key Terms:

  • SSID Broadcasting: Network name visibility setting. Can be hidden for security.
  • Data Throttling: Speed reduction after reaching usage threshold. Varies by carrier policy.

Docking Station

Hub providing multiple connectivity options and power delivery for mobile devices.

Key Terms:

  • Pass-through Charging: Ability to charge device while using dock. Power rating must match device requirements.
  • Display MST: Multi-Stream Transport allowing multiple displays. Requires compatible dock and device.

Input Devices

External peripherals for enhanced device interaction and control.

Key Terms:

  • Pressure Sensitivity: Feature in drawing tablets measuring input force. Levels vary by device.