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8257 Pin Diagram

8257 Pin Diagram: Fig. 14.61 shows 8257 Pin Diagram. Data Bus (D0-D7) : These are bi-directional tri-state signals connected to the system data bus. When CPU is having control of…

8257 DMA Controller

8257 DMA Controller: In microprocessor based systems data transfer can be controlled by either software or hardware. Upto this point we have used program instructions to transfer data from I/O…

Features of 8251 Microcontroller

Features of 8251 Microcontroller: The features of Features of 8251 Microcontroller are namely, 1. The Intel 8251A is an universal synchronous and asynchronous communication controller. 2. It supports standard asynchronous protocol…

Serial Communication Interface 8251

Serial Communication Interface 8251: Most of the microprocessors are designed for parallel communication. In parallel communication number of lines required to transfer data depend on the number of bits to…

8255 Interfacing with 8086

8255 Interfacing with 8086: Fig. 14.17 shows the 8255 Interfacing with 8086 Microprocessor and Interfacing 8255 with 8085 Microprocessor in I/O mapped I/O technique. Here RD and WR signals are…

8255 Pin Diagram

8255 Pin Diagram: Fig. 14.1 shows the 8255 Pin Diagram of Microprocessor. 8255 Block Diagram: Fig. 14.2 shows the internal 8255 block diagram of 8255 Pin Diagram Microprocessor. It consists…

16 Bit Microcontroller Articles

16 Bit Microcontroller Articles: 8096 Memory Space : The addressable memory space on the 8096 Memory Space consists of 64 K bytes, most of which is available to the user…

Microcontroller 8031 and 8051 Articles

Microcontroller 8031 and 8051 Articles: Features of 8051 Microcontroller: The Features of 8051 Microcontroller family are as follows. 1. Single-supply +5 volt operation using HMOS technology. 2. 4096 bytes program…