By Mrs. Deepali A Godse
An summary of 8085, structure of 8086, Microprocessor, certain features of normal function registers, 8086 flag check in and serve as of 8086 flags. Addressing modes of 8086, guide set of 8086, Assembler directives basic courses, approaches, and Macros. meeting language courses concerning logical, department and contact directions, Sorting, overview of mathematics expressions, String manipulation. Pin diagram of 8086-Minimum mode and greatest mode of operation, Timing diagram, reminiscence interfacing to 8086 (Static RAM and EPROM), want for DMA, DMA facts move approach, Interfacing with 8237/8257. 8255 PPI-Various modes of operation and interfacing to 8086, Interfacing keyboard, monitors, Stepper motor and actuators, D/A and A/D converter interfacing. Interrupt constitution of 8086, Vector interrupt desk, Interrupt provider exercises, advent to DOS and BIOS interrupts,.....
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Hence the SRAM technology is volatile. With each cell taking six transistors, SRAM is not dense. However, if made from CMOS (Complementary Metal Oxide Semiconductor) it can be made to consume very little Introducing the PIC® 16 Series and the 16F84A 31 power and can retain its data down to a low voltage (around 2 V). It has thus been a popular technology in battery-powered systems. SRAM is mainly used for data memory (RAM) in a microcontroller. 2 EPROM (Erasable Programmable Read-Only Memory) In this technology each memory cell is made of a single MOS transistor – but with a difference.
Second from right is the comparatively recent 40-pin PIC 16F877. While this looks similar to the 68000, it actually makes very different use of its pins. With its on-chip program and data memory it has no need for external data or address buses. Its high pin count is now put to good use, allowing a high number of digital input/output and other lines. In the middle is the 52-pin Motorola 68HC705. This is in a square ceramic package, windowed to allow the on-chip EPROM (Erasable Programmable Read-Only Memory) to be erased.
With a single transistor for a cell, EPROM is very high density and robust. Its requirement for a quartz window and ceramic packaging, to enable erasing, raises its price and reduces its flexibility. 10). As a technology, EPROM is now rapidly giving way to Flash, which follows shortly. 3 EEPROM (Electrically Erasable Programmable Read-Only Memory) EEPROM also uses floating gate technology. Its dimensions are finer, so that it can exploit another means of charging its floating gate. This is known as Nordheim Fowler tunnelling (NFT).