Intel 8085 Micro Processor
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The document discusses the Intel 8085 microprocessor. It is an 8-bit microprocessor from Intel, introduced in 1976. It has an internal architecture consisting of an arithmetic logic unit, timing and control unit, and registers. It has 40 pins, uses a 5V power supply, has a clock speed of around 3MHz, and contains 80 basic instructions. The document provides a block diagram of the Intel 8085 and describes its status flags and pin configuration.
Intel 8085 Micro Processor
- 2. What is Microprocessor….?? Derived from two word:-Micro& Processor
- 3. Microprocessor is central processing unit(CPU) of a computer.
- 4. It is the heart of the computer.
- 5. Controls the working of Computer.Intel Microprocessor 8085Intel 8085 is 8-bit,NMOS microprocessor40 pin I.C packageUses +5 V dc supplyClock speed is about 3 MHz80 basic instructions & 246 opcodesConsist of three main sections:-Arithmetic Logic Unit
- 6. Timing & Control Unit
- 7. RegistersBLOCK DIAGRAM OF INTEL 8085INTERRUPT SIGNALSSIDSOD----SERIAL I/O CONTROLINTERRUPTCONTROL8-BIT INTERNAL DATA BUSCBINSTRUCTIONREGISTER(IR)ACCUMULATORTEMPORARY REGISTERACCUMULATORDELHSTACK POINTER(SP)INSTRUCTIONDECODER&M/C CYCLEENCODINGARITHMETIC&LOGIC UNIT(ALU)PROG COUNTER(PC)INCREMENTER/DECREMENTERADDRESS LATCHTIMING & CONTROLUNITX1X2DATA/ADDRESSBUFFERADDRESSBUFFER-------CONTROL SIGNALSCLOCKA8- A15ADDRESS BUSAD0-AD7ADDRESS/DATA BUS
- 8. Status Flag of Intel 808501234567BIT NO.SZXACXPXCSSTATUS FLAGSUNDEFINED BITSCARRY STATUSPARITY STATUSAUXILIARY CARRY STATUSZERO STATUSSIGN STATUS
- 9. PIN CONFIGRATION OF INTEL 8085 MICROPROCESSORINTEL8085VSSAD0 – AD7VCCA8 – A15X1X2CLK ( OUT )CLK ( OUT )----------RESET INHOLDRESET OUT --IO/ MHLDASoTRAPS1--RDRST 7.5--WRRST 6.5ALERST 5.5SIDINTRSOD-----INTAREADY