1. 1 Q.1) Draw & Explain the Pin-Diagram of Microprocessor in Detail? Ans: The Microprocessor is an 8-Bit general-purpose. is a 40 pin IC, The signals from the pins can be grouped as follows Power supply and clock signals,Address bus,Data bus Pin Diagram and Pin description of It is used to know the type of current operation of the microprocessor. Microprocessor – All concepts, programming, interfacing and applications explained.
| Author: | Kirr JoJozilkree |
| Country: | Tajikistan |
| Language: | English (Spanish) |
| Genre: | Environment |
| Published (Last): | 28 March 2005 |
| Pages: | 358 |
| PDF File Size: | 2.64 Mb |
| ePub File Size: | 10.96 Mb |
| ISBN: | 831-6-86334-355-6 |
| Downloads: | 24901 |
| Price: | Free* [*Free Regsitration Required] |
| Uploader: | Kazrarr |
Power supply and Frequency signals: Control and Status Signals: It has the lowest priority among the interrupts. After the LCD process is over, the control is transferred back to analog and digital converter. These pins are multiplexed to be used as address bus as well as data bus.
This indicates if any other device is requesting the use of address and data bus. Pin Diagram of Microprocessor and its description is as follows: This pin provides serial input data.
This signal is used to control READ operation of the microprocessor. This pin provides the serial output data. They are time multiplexed. The serial data on this pin delivers its output to the seventh bit of the accumulator when SIM instruction is executed. The CPU is held in reset condition until this pin is high.
Such signals come under this category. READY is used by the microprocessor to check whether a peripheral is ready to accept or transfer data.
Pin Diagram and Pin description of
This is a Read control signal active low. This is used to acknowledge interrupt. Signals which aids in supplying power and generating frequency are associated with this type. This signal is primarily used to synchronize slower peripherals with the microprocessor. Pins nicroprocessor Vcc and ground are classified xeplanation this type. In the previous articles we saw about the architecture of microprocessor. It has the highest priority among the interrupts.
These 8 signal lines are unidirectional and used for most significant bits called higher order address bus of a bit address.
Pin Diagram and Pin description of 8085 Microprocessor
This is an active high output signal used to indicate that the microprocessor is reset. This signal is used to reset other devices in system.
This is an active high, serial input port pin, used to accept serial 1 bit data under software control. A crystal or RC, LC network is connected to these two pins. It microproceseor ground reference. They have higher priority than the INTR interrupt.
It has to be acknowledged.
Pin diagram of – Microprocessor Course
That is, they can be enabled or disabled using programs. The serial data on this pin is loaded into the seventh bit of the accumulator when RIM instruction is executed.
These pins are used for least significant bits of address bus in the first machine clock diagra, and used as data bus for second and third clock cycle. While the pin goes low, the address is assigned for the memory.
Pin-wise description of is as follows. The lower order address bus is added to memory or any external latch.
The pins A8-A15 denote the address bus. That is, an operation micdoprocessor performed when the signal goes low.
The frequency is internally divided by two; therefore to operate a system at 3 MHz, the crystal should have frequency of 6 Mhz.
Its frequency is always same as the frequency at which the microprocessor operates. This signal goes high during the first clock cycle and enables the lower order address bits.