8085 microprocessor

The Intel 8085  is an 8-bit microprocessor produced by Intel and introduced in 1976.This was the most advanced and developed computing chip produced at that time. In this blog I will explain everything about microprocessor that you need to know as per your school and college needs and I will also cover up some Assembly language programs for practicals. CONTENT'S(click...

Software Interrupts in 8085

Software interrupt are a type of interrupts that can be put at any location in the program. There are eight software interrupts i.e. RST0 to RST7.  These instructions transfer s the program control from the main program to subroutine program and after completing the subroutine program the control returns back to the main program Vector Address these interrupts are calculated by the below given...

Timing and control unit

Timing and control unit :             It provides timing and control signal to the microprocessor to perform the various operation.It has three control signal. It controls all external and internal circuits. It operates with reference to clock signal.It synchronizes all the data transfers.            The three control signals are:- ALE-Airthmetic...

Flag register

Flag register:-It contains 5 single bit flags and three unused bits which changes its status according to the result stored in an accumulator. It is also known as status registers.         There are five flip-flops in the flag register are as follows:  ...

Register array

Register array:      There are various types of registers in 8085.These registers are used for storage ,manipulating data and instructions.The different types of registers are: Accumulator. Temporary register. General purpose register. Program Counter. Stack Pointer. Instruction register. Flag...

Reset signals

RESET Signals: Reset in (PIN 36): This is active low input. This pin is used to reset the microprocessor. An active low signal applied to this pin reset the program counter inside the microprocessor. The buses are tri-stated. Reset out (PIN 3): If we want to reset the external devices connected to the microprocessor then a signal applied to this pin resets the external dev...

Hardware interrupts

       8085 has five hardware interrupt signals that can be used to interrupt program execution.these signals are             (1)TRAP            (2)RST 7.5            (3)RST 6.5            (4)RST 5.5            (5)INTR/INTA  ...