Q. The 8259-A is a _________.

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Q. ______ is used to transfer data between microprocessor and I/O process.

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Q. The registers that contain the status information is

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Q. Which of the following register can be addressed as a byte?

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Q. Which of the following is bit-addressable register?

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Q. The higher and lower bytes of a 16-bit register DPTR are represented respectively as

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Q. The register that is used for accessing external data memory is

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Q. Among the four groups of register banks, the number of groups that can be accessed at a time is

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Q. The number of 8-bit registers that a register bank contain is

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Q. If RS1=1, RS0=0, then the register bank selected is

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Q. If RS1=1, RS0=1, then the register bank selected is

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Q. The PCON register consists of

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Q. The on-chip oscillator is stopped in

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Q. In idle mode, the device that is disabled is

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Q. The only way to terminate the power down mode is to

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Q. The idle mode can be terminated by

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Q. Which of the following is an external interrupt?

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Q. The interrupts, INT0(active low) and INT1(active low) are processed internally by flags

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Q. The flags IE0 and IE1, are automatically cleared after the control is transferred to respective vector if the interrupt is

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Q. If the external interrupt sources control the flags IE0 and IE1, then the interrupt programmed is

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