Programmable Peripheral Interface - 8255A — Study Resources & PYQs
General purpose programmable peripheral device 8255A
- Estimated study time: 120 minutes
Study resources
- 8255A – Programmable Peripheral Interface (Article) — Full 8255A PPI coverage: architecture, 3 ports (A, B, C), modes 0/1/2, control word format, and BSR mode.
- 8255A – Interfacing with 8085 (Article) — Step-by-step tutorial on connecting 8255A to 8085: circuit diagram, address decoding, initialization, and example programs.
- 8255A, 8259A, 8237 – Full Video Coverage (Video) — Neso Academy lectures on programmable I/O devices covering 8255, 8259, DMA concepts, and interfacing techniques.
Programmable Peripheral Interface - 8255A previous year questions
- Explain mode 0 and mode 1 operations of 8255 ports.
- Explain the mode 1 input configuration of 8255 using its control word, control signals, timing diagram and status word.
- (a) Write the BSR control word to set bit 3 of port C and also write the BSR control word to reset bit 3 of port C. Introduce a 1 msec delay between set and re…
Taught in these subjects
- Microprocessor & Interfacing — CST-3503 · Government College of Engineering and Technology, Jammu