8051 MICROCONTROLLER
ARCHITECTURE OF 8085
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Question
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How many SFR’s available in 8051 microcontroller?
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21
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22
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23
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24
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Explanation:
Detailed explanation-1: -TIP: As only 21 of the possible 128 SFR memory locations are assigned, it is recommended that the remaining registers or memory locations are not accessed during programming. Before going further, get an idea on 8051 MICROCONTROLLER ARCHITECTURE.
Detailed explanation-2: -In the 8051, register A, B, DPTR, and PSW are a part of the group of registers commonly referred to as SFR (special function registers).
Detailed explanation-3: -The 8051 contains two 16-bit registers: the program counter (PC) and the data pointer (DPTR). Each is used to hold the address of a byte in memory. Program instruction bytes are fetched from locations in memory that are addressed by the PC.
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