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Define the DMA controller interface.
A DMA controller interfaces along with a few peripherals which may request DMA. The controller chooses the priority of simultaneous DMA requests communicates along with the peripheral and the CPU, and gives memory addresses for data transfer. DMA controller generally used with 8088 is the 8237 programmable device.
The 8237 is actually a special-purpose microprocessor. Normally this appears as part of the system controller chip-sets. The 8237 is a 4-channel device type. All channels are dedicated to an exact peripheral device and able of addressing 64 K bytes section of memory.
8237 microprocessor
Consider the common-emitter BJT circuit shown in Figure (a). The static characteristics of the npn silicon BJT are given in Figure (b) along with the load line. Calculate iB for v
Explain instruction sets of 8085. a) Data transfer group - MOV, MVI, LXI. b) Arithmetic group - ADD, SUB, INR. c) Branch group - JMP, JNZ, CALL. d) Logical group -
Limitations of maximum power transfer theorem
The Problem Based Learning is an approach to learning prepares the students to engage with challenges similar to real world problems.The VEB3001-Problem Based Learning has been an
Chopper Configuration Chopper are classified in five different classes according to their operating capability in particular quadrant. The current directions and voltage
Input Characteristics Transistors can be operated in the switching mode. If base current IB is zero transistor is in an ON state behaves as a switch. If the base cur
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Damage of revolving metallic disc due to tampering
What is a control word? It is a word kept in a register (control register) used to control the operation of a program digital device.
D.C. Generator A magnetic field is produced by afield coil supplied with a D.C. current and a rotor is placed between shaped pole pieces and wound with an armature wind
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