If they are tunable, yes you can. If the operating frequency is locked, no, you cannot.
Peripherals
Modular Router
computer
• tests Layer 2 connectivity • enabled by default on each interface • provides information on directly connected devices that have CDP enabled
Usb devices
An input interface card
User Interface Devices
We can't say the ports are input devices. Ports are just interface to which provides communication medium to the devices.
Mobile phones communicate with a Bluetooth headset via short-wavelength radio waves. Bluetooth devices can communciate with up to seven different devices at a time.
The 8051 can directly interface with a number of I/O. The 8255 just gives you the abilty to access 3 eight bit ports using a minimum number of control bits from the 8051
It is a small computer that acts as many different devices in a factory (I think) and replaces quite a lot of fiddly switches with one easy interface.
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