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Discuss mode -2 (bi-directional mode) of 8255 (Programmable Peripheral Interface).
Only permitted with port A. Bi-directional bus data used for interfacing two computers and GPIB interface.
INTR: Interrupt request is outputs which requests and interrupt
: output buffer is an output showing that the output buffer has data for the bi-directional bus.
: Acknowledge is an input and output which enables tri-state buffers that an otherwise in their high- impedence.
: The strobe input load data in the port A latch.
IFB: Input buffer full is an output showing that the input latch has information for the eternal bi-directional bus.
INTE: Interrupt enable are internal bits which enable the INTR pin. Bit PC6(INTE1) and PC4(INTE2).
PC2,PC1: Such port C pins are general- purpose I/O pins which are PC0 obtainable for any reasons.
SBI Subtract Immediate with Borrow Instruction This instruction is used to subtract 8 bit data and borrow from the accumulator. The result of the operation is stored
The very basic specifications of a UJT are: Vbb(max) - The maximum interbase voltage that can be applied to the UJT (b) Rbb-the interbase resistance of the UJT (c) n - The
Terminal The oval symbol show below in indicate terminal of the program. Usually words like START BEGIN STOP END are written in terminal symbol. START
Speed and Torque Control of Polyphase Induction Motors The induction motor is valuable in so many applications because it combines simplicity and ruggedness. Although a good nu
Describe in detail the construction and working of digital type oscilloscope.
advantages of constant current bias
Why is an armature winding in d.c machine called closed winding.
Bad Workmanship Bad workmanship contributes importantly towards increasing distribution losses. Efforts should, thus, be made to have the best probable workmanship. In this co
Define the DMA controller interface. A DMA controller interfaces along with a few peripherals which may request DMA. The controller chooses the priority of simultaneous DMA req
Masking As we know the MASJ is used to cover some part of our face which we want to hide and to show other part of the face which we want to show. Similarly the
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