0
What are the five sources of interrupt in 8051 microcontroller?
Wiki User
∙ 12y ago
Intr
timer interrupt 0 and 1
external interrupt 0 and 1
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
Explain about pin diagram of 8051 micro controller?
The microcontrollers have an 8-bit data bus. They are capable of addressing 64K of program memory and a separate 64K of data memory. The 8051 has 4K of code memory implemented as on-chip Read Only Memory (ROM). The 8051 has 128 bytes of internal Random Access Memory (RAM). The 8051 has two timer/counters, a serial port, 4 general purpose parallel input/output ports, and interrupt control logic with five sources of interrupts. Besides internal RAM, the 8051 has various Special Function Registers (SFR), which are the control and data registers for on-chip facilities. The SFRs also include the accumulator, the B register, and the Program Status Word (PSW), which contains the CPU flags. << SHARMILA TANDEL (B.E) ELECTRONICS >>
What is the interrupt number in 8085 microprocessor and how to find interrupt's vector address?
The 8085 has five interrupts, INTR, RST5.5, RST6.5, RST7.5, and TRAP. It also has eight software interrupts, RST0, RST1, ..., RST7. The INTR interrupt requires a hardware response that is an opcode. Usually, the opcode is either a CALL instruction, in which case the interrupt vector can go anywhere in memory, or it is an RST instruction, in which case the vector is based on a table in low memory. In the case of RST instructions, either directly or via INTR, or the RSTx.5 interrupts, you simply multiply the interrupt number by 8 to get the vector address. The following table presents the vector addresses for all possible interrupts... RST 0 - 00H RST 1 - 08H RST 2 - 10H RST 3 - 18H RST 4 - 20H TRAP - 24H RST 5 - 28H RST5.5 - 2CH RST 6 - 30H RST 6.5 - 34H RST 7 - 38H RST 7.5 - 3CH
Explain Externally initiated signals and interrupt in 8085?
The 8085 Microprocessor has five interrupts signals that can be used to interrupt a program execution. They are:INTR-Interrupt Request (Input): This is used as a general -purpose interrupt.INTA-Interrupt Acknowledge (Output): This is used to acknowledge an interrupt.RST 7.5, RST 6.5, RST 5.5-Restart interrupts (Inputs): These are vectored interrupts that transfer the program controls to specify memory locations. There have higher priorities than the INTR interrupt. Among these three, the priority order is 7.5, 6.5 and 5.5.TRAP (Input): This is a non-mask able interrupt and has the highest priority.In addition to the interrupts, three pins - RESET, HOLD, and READY - accept the externally initiated signals as inputs. The HOLD signal indicates that a peripheral such as a DMA (Direct Memory Access) controller is requesting the use of the address and data buses. The READY signal is used to delay the microprocessor READ or WRITE cycles until a slow-responding peripheral is ready to send or accept data. When this signal goes low, the microprocessor waits for an integral number of clock cycles until it goes high. Lastly, when the RESET IN signal goes low, the program counter is set to zero, the buses are tri-stated, and the MPU is reset and the RESET OUT signal indicates that the MPU is being reset and used to reset other devices.To respond to the HOLD request, the 8085 Microprocessor has one signal, called HLDA (Hold Acknowledge). It acknowledges the HOLD request.
How many five digit hexadecimal strings are there?
Considering the lowest five digit hexadecimal number is 10000 (65,536) and the highest is FFFFF (1,048,575), there are 983,040 different hexadecimal numbers that are five digits.
What are five Renaissance innovations?
nonshalont
Explain about pin diagram of 8051 micro controller?
The microcontrollers have an 8-bit data bus. They are capable of addressing 64K of program memory and a separate 64K of data memory. The 8051 has 4K of code memory implemented as on-chip Read Only Memory (ROM). The 8051 has 128 bytes of internal Random Access Memory (RAM). The 8051 has two timer/counters, a serial port, 4 general purpose parallel input/output ports, and interrupt control logic with five sources of interrupts. Besides internal RAM, the 8051 has various Special Function Registers (SFR), which are the control and data registers for on-chip facilities. The SFRs also include the accumulator, the B register, and the Program Status Word (PSW), which contains the CPU flags. << SHARMILA TANDEL (B.E) ELECTRONICS >>
What are five sources of sound?
Echolocation
What are five sources that are used to produce electrical energy?
Five types of energy sources are:hydro electricthermalsolarwindnuclear energygeothermaltidal/wavechemical (batteries)
What are the five basic food sources?
turtles
Five different energy sources?
sun
What are the five sources of pathogenic bacteria?
I belive the five sources of pathogenic bacteria is Raw food People Pests & Pets Soil Dust & Dirt
Name and explain five sources of debt financing?
name and explain 5 sources of debt financing
What are the five steps to expirements?
i want how to make sources of energy
What are five sources of non point- pollution?
road run off
What are five sources of inspiration that artists use?
Sources of artistic inspiration: Photographs; ordinary experience; observation; imagination; quest for order..
What are the five sources of inspiration that artists use?
Sources of artistic inspiration: Photographs; ordinary experience; observation; imagination; quest for order..
Are there five sources of energy and what are they?
water, wind,solar,hydro carbons and anti matter
