Question 61 : Which is the operation for mode 3?
1. 13-bit timer mode, 8-bit timer/counter THx and TLx as 5-bit prescalar
2. 16-bit timer mode, 16-bit timer/counter THx and TLx are cascaded, no prescalar
3. 8-bit auto reload mode, 8-bit auto reload time/counter; THx holds a value which is to be reloaded into TLx each time it overflows
4. Spilt timer mode
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Question 62 : What is the operation for mode 0?
1. 13-bit timer mode, 8-bit timer/counter THx and TLx as 5-bit prescalar
2. 16-bit timer mode, 16-bit timer/counter THx and TLx are cascaded, no prescalar
3. 8-bit auto reload mode, 8-bit auto reload time/counter; THx holds a value which is to be reloaded into TLx each time it overflows
4. Spilt timer mode
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Question 63 : Find the machine cycle for AT89C51 if XTAL = 11.0592MHz.
1. 90.42us
2. 361.68us
3. 1.085us
4. 150.145us
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Question 64 : PSEN stands for ________
1. Program Select Enable
2. Peripheral Store Enable
3. Program Store Enable
4. Peripheral Select Enable
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Question 65 : What is the minimum no of cycles required for reset operation?
1. 3 cycle
2. 2 cycles
3. 1 cycles
4. 4 cycles
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Question 66 : Reset work is __________
1. To make program counter zero but values in registers values are made as zero
2. Program counter is not zero but values in registers values are made asZero
3. Program counter not zero but values in registers values remain same
4. To make program counter zero but values in registers values remain same
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Question 67 : We use any other frequency source other than crystal oscillator.
1. True
2. False
3.
4.
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Question 68 : Does an 8051 microcontroller need external oscillator to run?
1. True
2. False
3.
4.
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Question 69 : Number of pins in 8051 microcontroller with ________ package.
1. 40 pin with LLC
2. 60 Pin with QFP
3. 40 pin with DIP
4. 60 pin with QFP
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Question 70 : Timer 0 is a ________ bit register.
1. 32-bit
2. 8-bit
3. 16-bit
4. 10-bit
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