How many pinouts are there in 8085?
40 pins
The 40 pins of the microprocessor can be divided into six groups such as address bus, data bus, control signals & status signals; power supply & frequency, externally started signals and serial input/output ports.
What is microprocessor CLK?
There are 3 clock signals, i.e. X1, X2, CLK OUT. X1, X2 − A crystal (RC, LC N/W) is connected at these two pins and is used to set frequency of the internal clock generator. This frequency is internally divided by 2. CLK OUT − This signal is used as the system clock for devices connected with the microprocessor.
What is Sid and sod in 8085?
The 8085 Microprocessor has Serial Input/Output lines consisting of two pins as follows: 1. Serial Output Data (SOD) 2. Serial Input Data (SID) They both are specially made for Input/Output which is further controlled by software. The transfer of data is controlled with the help of two instructions, i.e, SIM and RIM.
What is the function of hold in 8085 microprocessor?
HOLD – It indicates that another device is requesting the use of the address and data bus. Having received HOLD request the microprocessor relinquishes the use of the buses as soon as the current machine cycle is completed. Internal processing may continue.
What is the function of hold and Hlda signal?
(1) HLDA : (a) It is signal for HOLD ACKNOWLEDGEMENT. (b) A HLDA output indicates to a peripheral that a HOLD request has been received and that the microprocessor will relinquish control of buses in the next clock cycle.
What is the CLK frequency of 8085 microprocessor?
8085 operates on a clock frequency of 3MHz–6MHz depending upon the version selected. Clock is provided by a crystal oscillator of 2 times the frequency, so as to produce a 50% duty cycle clock.
What is the purpose of CLK signal of 8085 Mcq?
Explanation: CLK OUT : This signal is used as the system clock for devices connected with the microprocessor. 9.
What is AD0 AD7?
Pins 12 to 19 of 8085 are AD0 – AD7 which is the multiplexed address-data bus. Multiplexing is done to reduce the number of pins of 8085. Lower byte of address (A0 – A7) are available from AD0 – AD7 (pins 12 to 19) during T1 of machine cycle.
What is the purpose of Sid and sod?
Answer. SID and SOD signals are used for 8085 microprocessor. SID (Serial input data line): It is an input line through which the microprocessor accepts serial data. SOD (Serial output data line): It is an output line through which the microprocessor sends output serial data.
What is the purpose of Sid and sod lines?
SID (Serial input data line): It is an input line through which the microprocessor accepts serial data. SOD (Serial output data line): It is an output line through which the microprocessor sends output serial data.
What is hold signal?
A signal that causes a central processing unit to stop its activity and to relinquish control over the bus until the signal is removed.