Multiplexing is where you represent more than one bit (byte, word, etc.) on one wire (bus, etc.) in different units of time.
In the Intel 8085, the low order address bus and the data bus are multiplexed, each with 8 bits shared on one 8 but bus. There are four strobes involved...
ALE, Address Latch Enable, means that the bus represents address information, specifically the low order address. External hardware is expected to strobe the bus on the falling edge of ALE. Actual address validity occurs somewhat before, around the one third point of ALE, depending on clock speed, so normally ALE is a passthrough strobe, giving external hardware a bit of extra time to decode the address.
WR-, Write Strobe, means that the bus represents data information to write to IO or memory. External hardware is expected to strobe the data on the rising edge of WR-. WR- is low for one and a half clock cycles, not counting wait cycles. The data bus is held valid for one half additional clock cycle in order to assure data setup and hold times.
RD-, Read Strobe, means that the bus represents data information to read from IO or memory. External hardware is expected to drive the data during RD- low, with the processor strobing the data one half clock cycle prior to RD- going high. RD- is held true (low) for one and a half clock cycles, not counting wait cycles. Note very carefully that the timing from ALE to data strobe point is not the same for write cycles versus read cycles. This is by design.
INTA-, Interrupt Acknowledge, means that the bus represents data information to read from an interrupt controller. External hardware is expected to drive the data during INTA- low, with the same timing as RD-, providing an interrupt vector, either an RST or a CALL instruction. This is in response to an INTR, Interrupt Request, signal.
error correction data compression
Frequency-division multiplexing, wavelength-division multiplexing, and time-division multiplexing.
What is multiplexing and its diagram
Orthogonal frequency-division multiplexing
The difference is the way the data is separated and transmitted between two points. In Space Division the data is separated physically i.e. the carrier medium is divided into different channels. This could be by using different wires, waveguides, optical cables, etc, or by frequency i.e. radio channel, carrier frequency. Time Division uses the same channel in one of the above but different data is given a specific order and location in time for transmission. e.g. Synchronsation followed by type (a) data, then type (b) data followed by a checksum. The whole process is repeated continuously until transfer is complete.
application of multiplexing in data communication
If you have less no of data than the no of bits of data or address to b transfer Multiplexing mean to manage given busses in such a way that data or address can be transferred perfectly
Data selection and routingControl sequencer
Orthogonal frequency division multiplexing is special case of frequency division multiplexing where a ling serial data streams are divided into parallel data streams and each data stream is multiplied either by orthogonal frequency or code. when multiplied by code known as frequency code division multiplexing and when multiplied by orthogonal frequency then know as orthogonal frequency division multiplexing
multiplexing
error correction data compression
Multiplexer(Multiplexing).In telecommunications and computer networks,multiplexing(also known as muxing) is a method by which multiple analog message signals or digital data streams are combined into one signal over a shared medium.
Multiplexing the data of diverse application over a common channel can be a good thing.
Frequency-division multiplexing, wavelength-division multiplexing, and time-division multiplexing.
Time Division Multiplexing and Frequency Division Multiplexing. Allows multiple data channels across a single medium by separating the data streams onto different frequencies (FDM), or by sending one stream, waiting, then sending the other stream (TDM).
circuit switching data bearer channel time-division multiplexing
multiplexing