Unit – 2

Unit – 2 I/O Memory Interface ,[object Object],[object Object],[object Object]

Content ,[object Object],[object Object],[object Object],[object Object]

1. Introduction to Data Transfer Techniques ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

2. Programmed Data Transfer ,[object Object],[object Object],[object Object]

Programmed data transfer techniques ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Parallel Data Transfer ,[object Object],[object Object],[object Object],[object Object],[object Object]

Serial data transfer ,[object Object],[object Object],[object Object],[object Object]

Comparison of Parallel/ Serial ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Synchronous data transfer ,[object Object],[object Object],[object Object]

Asynchronous Data Transfer ,[object Object],[object Object],[object Object],[object Object]

Comparison of Asynchronous/ Synchronous Data Transfer techniques ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Interrupt Initiated Data Transfer ,[object Object],[object Object],[object Object]

3. DMA Controlled Data Transfer ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Microprocessor Memory DMA Controller I/OPort I/OPort I/OPort External device External device External device

8085 signals used for DMA ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

DMA Modes of Operation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

DMA Data Transfer Techniques ,[object Object],[object Object],[object Object],[object Object]

Burst or Block Transfer ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Cycle Steal/ Single Byte Transfer DMA ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Transparent or Hidden DMA ,[object Object],[object Object],[object Object],[object Object],[object Object]

4. 8251 USART – A Serial I/O Processor ,[object Object],[object Object],[object Object]

How 8085 uses 8251 for serial communication? ,[object Object],[object Object],[object Object],[object Object]

Features of 8251 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

References ,[object Object],[object Object],[object Object],[object Object]

Unit – 2

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Unit – 2