If the device is operational and ready to transmit, the processor requests the transfer of data due OV/O module obtains a unit of data (e.g., 8 or 16 bits) OV/O module obtains a unit of data (e.g., 8 or 7 bits) Ocommand to the I/O module
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- A DMA module is transferring characters to memory using cycle stealing mode, from a device which is transmitting at a rate of 19200 bps. The rate at which processor is fetching the instruction is 2 million instructions per second (2 MIPS). Due to DMA, CPU slowed down by? (In %)MISD runs on device arrays that are arranged in a systolic fashion. A systolic array is a "wavefront" or data processing pipeline. As the data is what really initiates execution, these subparts may function independently of the rest of the programme. When the clocks of the Processors in a systolic array are synchronised, they may do calculations "lock-step."A DMA module is transferring characters to main memory from an external device transmitting at 9600 bits per second (bps). The processor can fetch instructions at the rate of 1 million instructions per second. By how much will the processor be slowed down due to the DMA activity?
- DMA transfers 8 bits in 1 CPU cycle at regular intervals. For a 2 Mhz processor, if CPU uses 0.6% processor cycles for DMA, determine the data transfer rate in bits per second.DMA transfers 8 bits in one CPU cycle at regular intervals. For a 2 Mhz processor, if CPU uses 0.4% processor cycles for DMA, determine the data transfer rate in bits per second.A system clocked at 1 GHz wants to read data from a hard disk. The hard disk needs some time to read the data and to prepare it for transmission. An interrupt routine requires 240 cycles each, polling requires 50 cycles each. The interrupt routine would be more efficient after how many polls.
- A DMA module is transferring data to memory using cycle stealing from a device that transmits data at rate of 19,200 bits per second. The speed of the CPU is 3 MIPS. By how much would the DMA module affect the performance of the CPU (Assume 8 bits per char or byte).Asynchronous serial communication is made between the keyboard peripheral and the digital computer. The "A" character printed from the keyboard will be transferred to the CPU. (Note: take the start and end bits as 1 bit long and the character bits as 8 bits long. Since ASCII is 7 bits, add a bit 0 to the most significant bit.) In the asynchronous serial communication connection, explain the operations from the keyboard to the digital computer only, through this example. Also, explain the types of errors that can be encountered in this connection, through this example.Que. When the R/W bit of the status register of the DMA controller is set to 1. i) Read operation is performed ii) Write operation is performed iii) Read & Write operation is performed iv) None of the mentioned
- A ROM chip of 4,096×8 bits has two chip select inputs and operates from a 5-V power supply. How many pins are needed for the integrated circuit package? Draw a block diagram, and label all input and output terminals in the ROM.q .The code sent by the device in vectored interrupt is _____ long.i) upto 16 bitsii) upto 32 bitsiii) upto 24 bitsiv) 4-8 bitsD3. Assume that the XMEGA128A1U peripheral clock frequency is 32 MHz. Write an instruction sequence to generate a 660 Hz square waveform from PD0 pin using the FRQ mode. Set the timer clock prescaler to 8. Use TCD0 timer to generate this waveform. Solution: