Page 125 - Digital Electronics by harish

64-bit microprocessors:

 Performs arithmetic and logical operations on 64-bit data
 Intel‟s Pentium microprocessor executes 100 million instructions per second
(MIPS).
 Examples: Intel‟s Pentium (80586), Intel‟s Pentium Pro, Intel‟s Pentium II,
Celeron, Intel‟s Pentium III and Intel‟s Pentium IV

5.1.2 Introduction to 8085 Microprocessor

8085 Microprocessor was first introduced by Intel Corporation, USA in the
year 1976. It has 6,500 transistors. The important features of 8085 are given
below:

 8-bit microprocessor. i.e. data bus width is 8 bits.
 16-bit address bus. Hence, the maximum memory range is 64 Kilo Bytes
16
(2 ). The lower order address lines A0 to A7 is multiplexed with the data
lines D0 to D7.
 Available in 3 MHz, 5 MHz and 6 MHz clock frequencies

 Built-in clock generator circuit
 Serial In and Serial Out data port for serial data communication
 Three maskable and one non-maskable vectored interrupts
 Decimal, binary and double precision arithmetic operations
 Single +5V power supply
 Available in 40 pin Dual Inline Package (DIP)

Pin diagram of 8085 Microprocessor

There are 40 pins in Intel 8085 microprocessor. The photo image is
shown in figure 5.2 and pin diagram is shown in figure 5.3.

Figure 5.2 : Intel 8085 microprocessor

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