0
Which of the following consists of 24 channels each with a bandwidth of 64Kb?
Wiki User
∙ 12y ago
ISDN
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
Can i see video on YouTube with 128 kbps speed of wimax?
128 kbps, no; 128 KB/s, yes. Youtube needs at least 512 kbps, or 64KB/s.
How much space is in 1 computer gigabyte?
A gigabye is equal to 1,000 Megabytes (MB) and a Megabyte is equal to 1,000 kilobytes (KB). A kilobyte is equal to 1,000 bytes.
How many megabytes is an mp3?
What, an individual .MP3 song? Depends on two things - the length of the song and the bit rate that the track was ripped at. Obviously ripping a 1 minute song creates a smaller .MP3 file than a 3 minute song at the same bit rate. On the other hand, a 1 minute song at 192kb could be a bigger file than a 3 minute song at 64kb. Higher the bit rate, the better quality the .MP3 will be.
Complete architecture of 8086 microprocessor?
8085 Architecture - II Written by: shankar • Edited by: KennethSleightPublished Sep 30, 2009 • Related Guides: IntelLearn in detail about the functions and working of flags, the timing and control unit, Interrupt control and various other signals associated with it. Also learn about the Data bus and address bus present in 8085 microprocessor and how these units combine to process a data altogether.IntroductionIn the previous articles we learnt about what are microprocessors in general and the about the 8085 microprocessor in particular. We saw the various registers used in 8085 microprocessor and how they act along with Arithmetic and Logic unit to process a data. But Registers and ALU alone cannot successfully process a data and provide the result to the programmer. There are various other units which help in data transfer and addressing, Carry operation while adding or subtracting, and sometimes also to interrupt a process when necessary. Let us discuss about those units in detail.Architecture DiagramFlagsFlags are nothing but a group of individual Flip-flops. The flags are mainly associated with arithmetic and logic operations. The flags will show either a logical (0 or 1) (i.e.) a set or reset depending on the data conditions in accumulator or various other registers. A flag is actually a latch which can hold some bits of information. It alerts the processor that some event has taken place.TI's Signal Conditionersti.comCutting Edge Silicon Process Tech & Advanced Analog Circuit DesignAds by GoogleBut why are they called flags?The possible solution is from the small flags which are found on the mail boxes in America. The small flag indicates that there is a mail in the mail box. Similarly this denotes that an event has occurred in the processor.Intel processors have a set of 5 flags.Carry flagParity flagAuxiliary carry flagZero flagSign flagConsider two binary numbers.For example:1100 00001000 0000When we add the above two numbers, a carry is generated in the most significant bit. The number in the extreme right is least significant bit, while the number in extreme left is most significant bit. So a ninth bit is generated due to the carry. So how to accommodate 9th bit in an 8 bit register?For this purpose the Carry flag is used. The carry flag is set whenever a carry is generated and reset whenever there is no carry.But there is an auxiliary carry flag? What is the difference between the carry flag and auxiliary carry flag?Let's discuss with an example. Consider the two numbers given below0000 0100, 0000 0101When we add both the numbers a carry is generated in the third bit from the least significant bit. This sets the auxiliary carry flag. When there is no carry, the auxiliary carry flag is reset.So whenever there is a carry in the most significant bit Carry flag is set. While an auxiliary carry flag is set only when a carry is generated in bits other than the most significant bit.Parity checks whether it's even or add parity. This flag returns a 0 if it is odd parity and returns a 1 if it is an even parity. Sometimes they are also called as parity bit which is used to check errors while data transmission is carried out.Zero flag shows whether the output of the operation is 0 or not. If the value of Zero flag is 0 then the result of operation is not zero. If it is zero the flag returns value 1.Sign flag shows whether the output of operation has positive sign or negative sign. A value 0 is returned for positive sign and 1 is returned for negative sign.Instruction Register and DecoderInstruction register is 8-bit register just like every other register of microprocessor. Consider an instruction. The instruction may be anything like adding two data's, moving a data, copying a data etc. When such an instruction is fetched from memory, it is directed to Instruction register. So the instruction registers are specifically to store the instructions that are fetched from memory.There is an Instruction decoder which decodes the informations present in the Instruction register for further processing.Timing and Control UnitTiming and control unit is a very important unit as it synchronizes the registers and flow of data through various registers and other units. This unit consists of an oscillator and controller sequencer which sends control signals needed for internal and external control of data and other units.The oscillator generates two-phase clock signals which aids in synchronizing all the registers of 8085 microprocessor.Signals that are associated with Timing and control unit are:Control Signals: READY, RD', WR', ALEStatus Signals: S0, S1, IO/M'DMA Signals: HOLD, HLDARESET Signals: RESET IN, RESET OUTInterrupt ControlAs the name suggests this control interrupts a process. Consider that a microprocessor is executing the main program. Now whenever the interrupt signal is enabled or requested the microprocessor shifts the control from main program to process the incoming request and after the completion of request, the control goes back to the main program. For example an Input/output device may send an interrupt signal to notify that the data is ready for input. The microprocessor temporarily stops the execution of main program and transfers control to I/O device. After collecting the input data the control is transferred back to main program.Interrupt signals present in 8085 are:INTRRST 7.5RST 6.5RST 5.5TRAPOf the above four interrupts TRAP is a NON-MASKABLE interrupt control and other three are maskable interrupts.A non-maskable interrupt is an interrupt which is given the highest priority in the order of interrupts. Suppose you want an instruction to be processed immediately, then you can give the instruction as a non-maskable interrupt. Further the non-maskable interrupt cannot be disabled by programmer at any point of time.Whereas the maskable interrupts can be disabled and enabled using EI and DI instructions. Among the maskable interrupts RST 7.5 is given the highest priority above RST 6.5 and least priority is given to INTR.Serial I/O controlThe input and output of serial data can be carried out using 2 instructions in 8085.SID-Serial Input DataSOD-Serial Output DataTwo more instructions are used to perform serial-parallel conversion needed for serial I/O devices.SIMRIMAddress buffer and Address-Data bufferThe contents of the stack pointer and program counter are loaded into the address buffer and address-data buffer. These buffers are then used to drive the external address bus and address-data bus. As the memory and I/O chips are connected to these buses, the CPU can exchange desired data to the memory and I/O chips.The address-data buffer is not only connected to the external data bus but also to the internal data bus which consists of 8-bits. The address data buffer can both send and receive data from internal data bus.Address bus and Data bus:We know that 8085 is an 8-bit microprocessor. So the data bus present in the microprocessor is also 8-bits wide. So 8-bits of data can be transmitted from or to the microprocessor. But 8085 processor requires 16 bit address bus as the memory addresses are 16-bit wide.The 8 most significant bits of the address are transmitted with the help of address bus and the 8 least significant bits are transmitted with the help of multiplexed address/data bus. The eight bit data bus is multiplexed with the eight least significant bits of address bus. The address/data bus is time multiplexed. This means for few microseconds, the 8 least significant bits of address are generated, while for next few seconds the same pin generates the data. This is called Time multiplexing.But there are situations where there is a need to transmit both data and address simultaneously. For this purpose a signal called ALE (address latch enable) is used. ALE signal holds the obtained address in its latch for a long time until the data is obtained and so when the microprocessor sends the data next time the address is also available at the output latch. This technique is called Address/Data demultiplexing.
What is memory word size required in an 8085 system?
64KB
Why are segments limited to 64kb?
Because the offset address is 16 bits. This allows you to access 64kb with only one instruction.
Is 7.9 MB bigger than 64KB?
Yes.
What is tiny and small memory?
In x86 family of CPUs, there are six memory models. Memory is managed in "chunks" (segment or page) of 64K words. To find a specific location, the CPU needs to know the segment it is in and how far down (the offset) it is from the beginning of the segment. In addition, the x86 CPUs support three types of pointers: * near pointers access data in the specified segment * far pointers can access data within a 1MB address space * huge pointers are a type of far pointer, but with specialized behavior So applications written for the x86 world had to specify a type of memory model which detailed how pointers work. Generally speaking, the rules are: If code is under 64KB... and data is under 64KB... use Tiny or Small model If code is over 64KB... and data is under 64KB... use Medium model If code is under 64KB... and data is over 64KB... use Compact model If code is over 64KB... and data is over 64KB... use Large model
What kind of batteries does a casio B.O.S.S. 64kb digital diary use?
lillian
Why in memory segmentation of 8086 it use 64Kb instead of 1Mb?
Each segment in the 8086/8088 is 64KB because that is how Intel designed the microprocessor. The offset address is 16 bits, making the allowable range 64KB. See the related questions link for a further discussion of segmented architecture.
Define the extra segment and stack segment?
The extra segment in the 8086/8088 is a 64kb region of memory that is indexed by the displacement address of the destination of certain string operations, relative to DI. Contrast that with the data segment, which is a 64kb region of memory that is indexed by the displacment address of the displacement of most operand addresses. The stack segment is similar, but it is used for stack oriented data, relative to SP or BP.
How many bytes are addressable the 8086?
The 8086 can address 1,114,080 bytes. (One Mb + 64Kb - 16) That does not count I/O space, it only counts memory space.
What type of computer is the Commodore 64?
It is an 8- bit computer with 64KB of RAM and was produced in 1982. It was produced as a home computer and can be connected to a monitor and floppy disk drive.
Can i see video on YouTube with 128 kbps speed of wimax?
128 kbps, no; 128 KB/s, yes. Youtube needs at least 512 kbps, or 64KB/s.
What is the size of the data bus and the L1 cache on a Core 2 Duo CPU?
64 bit data bus and two L1 (64KB) caches; one L1 cache for each core (cpu)
What is the size of the data bus and l1 cache on a core 2 duo CPU?
64 bit data bus and two L1 (64KB) caches; one L1 cache for each core (cpu)
