lecture4(IO) - 4. Input, output & Peripherals Addresses...

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Page 1 These are the locations for data or instructions Each data or instruction requires at least one address The number of bits used in an address depends on the size (range) of data or instruction, e.g. A 10-bit address line can handle 2 10 = 1024 (1K) memory locations 4. Input, output & Peripherals Addresses
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Page 2 Buses These are connecting wires between components inside a μ P Each wire carries one bit Just like addresses, the number of bits requires depends on the size of data carried Buses
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Page 3 Data, address, and control signals are shared by all system components via the bus. Each component connected to the bus communicates information to and from the bus via its own bus controller. Buses (cont.)
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Devices usually have a combination logic address decoder circuit that identifies the address code for the device. The control lines contain read and write signals, the system clock, and other control signals such as system interrupts. Devices & Control Signals
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lecture4(IO) - 4. Input, output & Peripherals Addresses...

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