Книга: Introduction to Microprocessors and Microcontrollers

Quiz time 7

In each case, choose the best option.

1 The Digital Alpha 21064 microprocessor has a 34-bit address bus which can access a memory of:

(a) 64 Gbytes.

(b) 64 Mbytes.

(c) 16 Gbytes.

(d) 160 Mbytes.

2 The data bus:

(a) is bi-directional.

(b) consists of eight conductors.

(c) can be used to carry data to RAM and ROM memory chips.

(d) is connected to the chip select pins.

3 A 16-bit address bus is carrying the address 4567H and is partially decoded with lines A15 and A13 being unused. Which one of these addresses would access a different hardware location:

(a) E567H.

(b) 4567H.

(c) 6567H.

(d) 8567H.

4 Which one of the following is NOT essential in a microprocessor-based system:

(a) an address bus.

(b) ROM.

(c) a clock signal.

(d) RAM.

5 Image addresses are:

(a) also called ghost addresses.

(b) due to several hardware addresses pointing to the same software address.

(c) the same as partial addresses.

(d) caused by full decoding.

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