please help 1. (TCO 8) Since the CPU provides data on the data bus for a short a
ID: 3541098 • Letter: P
Question
please help
1. (TCO 8) Since the CPU provides data on the data bus for a short amount of time, during a bus cycle, the data must be __________ before it is gone. (Points : 4) tri-stated
latched
ignored
All of the above
CMOS
ECL
They are the same
Explanation / Answer
Answer 1:
The correct answer is option (b) latched.
Latched: as the data is provided for a short duration, it must be saved. A can be used for storing the data.
Answer 2:
The correct answer is option (c) ECL.
ECL -In this logic circuit, the transistors never enter into saturation mode. The input impedance is high and the output resistance is low, hence the transistors change states quickly
Answer 3:
The correct answer is option (a) Use the higher fan-out.
In general the higher fan-out is used if there is a difference in the fan outs.
Answer 4:
The correct answer is option (b) only for a LOW output.
As VOH of the logic gate is less than that of the driving gate, the circuit works only for a low output.
Answer 5:
The correct answer is option (c) PORTB = PORTB | 0X1;
0th bit of PORTB should be made high, initially PORTB bits are all 0 so, OR-ing PORTB with 0x01 makes 0th bit 1.
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