Comparing to Unit-1, Unit-2 is all about how to interface a device with the microprocessor and I/O devices. It is divided into 3 parts as mentioned below in the syllabus
Unit-2 INTERFACING AND I/O DEVICES - Syllabus
Need for Interfacing - /Memory Interfacing: address space partitioning – address map – Address
decoding – Designing decoders circuit for the given address map – Bus contention and 2 – line
Control – Access Time Computations.
I/O Interfacing: Data transfer schemes – programmed Synchronous and asynchronous –
Interrupt driven Transfer – Multiple devices and multiple interrupt levels – enabling disabiling
and masking of interrupts.
DMA transfer: Cycle stealing – Burst mode – Multiple DMA devices – DMA transfer in 8085
system – serial data transfer.
For unit-2 we have to follow the Text book suggest as per syllabus, the text book is "Introduction to Microprocessor" – Third Edition – Aditya P Mathur TataPublishing Company Ltd., New Delhi 3rd
Edition 2003.
Unit-2 INTERFACING AND I/O DEVICES - Syllabus
Need for Interfacing - /Memory Interfacing: address space partitioning – address map – Address
decoding – Designing decoders circuit for the given address map – Bus contention and 2 – line
Control – Access Time Computations.
I/O Interfacing: Data transfer schemes – programmed Synchronous and asynchronous –
Interrupt driven Transfer – Multiple devices and multiple interrupt levels – enabling disabiling
and masking of interrupts.
DMA transfer: Cycle stealing – Burst mode – Multiple DMA devices – DMA transfer in 8085
system – serial data transfer.
Edition 2003.
Unit-2, starts from Page no.205 to 253.
It is scanned and attaced in the below link for your studying purpose, Please use of this material to get good understanding on unit-2.
Click Here - For Unit-2 Reference material