what are cpu device
CPU is not a peripheral device.
peripheral
By device do you mean hardware or peripheral? If hardware: it's the CPU If you mean peripheral it depends. It can either be your printer or your monitor, depending how big you want your monitor to be.
It's called a "Peripheral Adapter" as most add-in modules connect to devices outside the computer. There is one exception. On much older PCs, a user could add a math coprocessor board which did not attach to any external device. This was typically called a "daughter board" and the main processor board was called the "mother board".
subroutine
it is used to interface between controller and peripheral device.. peripheral device otherwise called external device such as LED,LCD...
A micro processor is commonly thought to be the central processing unit of a computer system. This CPU may contain peripheral devices on the same chip, and connects to peripheral devices located on different chips. Thus, a micro processor is not commonly thought to be a peripheral. However, a micro processor is often used to create a peripheral device. For example, a hard disk drive is a peripheral device to your PC's CPU. However, the electronics within that hard disk drive itself may contain another micro processor. This micro processor acts as the CPU within the realm of the hard disk drive, but towards the total PC system, it implements a peripheral device of the central processing unit.
No, the printer has a internal processor that manages its functions, but yes, it is a device that connects to the system unit. the computer's processor HELPS managing it, but the printer's processor do the hard stuff
Docking Station
external data bus
What interface that controls a peripheral device is.
It is called a device driver.