Web1 Answer. 8255 is a programmable peripheral interface. It is used to interface microprocessor with I/O devices via three ports: PA, PB and PC. All ports are 8-bit and bidirectional. 8255 transfers data with the microprocessor through its 8-bit data bus. The two address lines A1 and A0 are used to make internal selection in 8255. WebModes of Operation of 8255 Microprocessor: Bit Set-Reset (BSR) Mode: The individual bits of Port C can be set or reset by sending out a single OUT instruction to the control register. When Port C is used for control/status operation, this feature can be used to set or reset individual bits. I/O Modes: Mode 0 : Simple input/output:
8255 Pin Diagram 8255 Block Diagram Modes of Operation of …
WebThe 80387 numeric data co-processor is an advanced version of 80287 and it is a high performance numeric data processor and it is specifically designed to operate with 80386 CPU. The instruction set of the 80387 co-processor is transparent to the programmers. The 80387 provides six to eleven times better performance as compared to 80287. rich lindsay d ma
Interfacing Analog to Digital Data Converters - NPTEL
WebThis can be achieved by programming the bits of an internal register of 8255 called as control word register (CWR). This buffer receives or transmits data upon the execution of input or output instructions by the … http://www.gpcet.ac.in/wp-content/uploads/2024/03/mpi-23-63.pdf WebAug 1, 2024 · 8255 is a popularly used parallel, programmable input-output device. It can be used to transfer data under various condition from simple input-output to interrupt input-output. This is economical, functional, flexible but is a little complex and general purpose … Explanation – MVI A, 92H means that the value of the control register is 92.; D7=1 … redrawn texas congressional districts