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Question

What is the total external data memory that can be interfaced to the 8051?

The correct answer is

64 K

Memory in K = (65,536)/(1024) Memory in K = 64 K External Memory Spaces The 8051 can access external program memory and external data memory. Both share the 16-bit address bus, meaning the total addressable external memory space is 64 K.

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Important Questions from Microprocessors and Microcontrollers

  1. Data and address bus width of 8085 microprocessor respectively are

  2. The number of interrupts handled by 8051 microcontroller (other than Reset) is _____.

  3. How many bits are used in the data bus of 8051 ?

  4. 16-bit registers consist of:

  5. The 8051 microcontroller has __________ on-chip RAM and __________ on-chip ROM.
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