Parallel I/O Interfacing with 8085 (8255 Programmable Peripheral Interface)
24 sections
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Sections
Navigate through the learning materials and practice exercises.
What we have learnt
- The 8255 PPI enables parallel I/O operations between the microprocessor and peripheral devices, facilitating efficient data transfer.
- The control word format for configuring the 8255 is critical to define the operating mode for ports A, B, and C.
- I/O Mode and Bit Set/Reset Mode are two primary operating modes of the 8255, each serving distinct functions in handling input and output.
Key Concepts
- -- 8275 Programmable Peripheral Interface (PPI)
- A dedicated integrated circuit that allows communication between the CPU and other peripherals utilizing parallel data lines.
- -- Control Word
- An 8-bit command that configures the modes and directions of the PPI ports.
- -- I/O Modes
- Operational settings of the 8255 PPI that dictate how its ports can function as input or output.
- -- Bit Set/Reset Mode
- A specific operating mode that allows the individual setting or resetting of bits in Port C without affecting other bits.
Additional Learning Materials
Supplementary resources to enhance your learning experience.