Consider the following statements regarding 8051 architecture:
1. It is an 8-bit microcontroller.
2. It has Harvard architecture.
3. It has separate program and data memory spaces.
Which of the above statements is/are correct?
Answer & step-by-step solution
The classic 8051 is an 8-bit Harvard-style microcontroller with separate code and data spaces. The standard core has 4 KB on-chip program ROM and 128 bytes internal RAM, supports external memory, multiple interrupts and configurable interrupt priority. Key relation: Reset SP=07H; classic internal RAM=128 bytes; standard ROM=4 KB.
Exam focus: Remember 07H for stack pointer reset. Common trap: 00H is not the reset value of the 8051 stack pointer.
Statement-wise Verification
- Statement 1 - Correct.
It is an 8-bit microcontroller.
The classic 8051 is an 8-bit Harvard-style microcontroller with separate code and data spaces. - Statement 2 - Correct.
It has Harvard architecture.
The classic 8051 is an 8-bit Harvard-style microcontroller with separate code and data spaces. - Statement 3 - Correct.
It has separate program and data memory spaces.
The classic 8051 is an 8-bit Harvard-style microcontroller with separate code and data spaces.
Core Concept
The classic 8051 is an 8-bit Harvard-style microcontroller with separate code and data spaces. The standard core has 4 KB on-chip program ROM and 128 bytes internal RAM, supports external memory, multiple interrupts and configurable interrupt priority. On reset the stack pointer is 07H, so the first PUSH stores at 08H.
Formula / Key Relationship
Reset SP=07H; classic internal RAM=128 bytes; standard ROM=4 KB.
Why the Other Options Are Wrong
Option A is incorrect because it omits correct statement(s) 3. Option B is incorrect because it omits correct statement(s) 1. Option C is incorrect because it omits correct statement(s) 2.
Exam Shortcut / Approach
Remember 07H for stack pointer reset.
Common Mistake
00H is not the reset value of the 8051 stack pointer.
Quick Revision
8-Bit Harvard Architecture is linked with 8051 Architecture, 8051 Microcontroller and Microprocessors and Microcontrollers. Remember 07H for stack pointer reset.
8051 आर्किटेक्चर के संबंध में निम्नलिखित कथनों पर विचार कीजिए:
1. यह एक 8-बिट माइक्रोकंट्रोलर है।
2. इसमें हार्वर्ड आर्किटेक्चर है।
3. इसमें अलग प्रोग्राम और डेटा मेमोरी स्पेस हैं।
उपरोक्त में से कौन-सा/से कथन सही है/हैं?
उत्तर और चरणबद्ध हल
D — 1, 2 और 3। 8051 एक 8-बिट, हार्वर्ड-शैली माइक्रोकंट्रोलर है जिसमें कोड और डेटा मेमोरी स्पेस अलग-अलग हैं।
विस्तृत हल (मूल भाषा में)
Statement-wise Verification
- Statement 1 - Correct.
It is an 8-bit microcontroller.
The classic 8051 is an 8-bit Harvard-style microcontroller with separate code and data spaces. - Statement 2 - Correct.
It has Harvard architecture.
The classic 8051 is an 8-bit Harvard-style microcontroller with separate code and data spaces. - Statement 3 - Correct.
It has separate program and data memory spaces.
The classic 8051 is an 8-bit Harvard-style microcontroller with separate code and data spaces.
Core Concept
The classic 8051 is an 8-bit Harvard-style microcontroller with separate code and data spaces. The standard core has 4 KB on-chip program ROM and 128 bytes internal RAM, supports external memory, multiple interrupts and configurable interrupt priority. On reset the stack pointer is 07H, so the first PUSH stores at 08H.
Formula / Key Relationship
Reset SP=07H; classic internal RAM=128 bytes; standard ROM=4 KB.
Why the Other Options Are Wrong
Option A is incorrect because it omits correct statement(s) 3. Option B is incorrect because it omits correct statement(s) 1. Option C is incorrect because it omits correct statement(s) 2.
Exam Shortcut / Approach
Remember 07H for stack pointer reset.
Common Mistake
00H is not the reset value of the 8051 stack pointer.
Quick Revision
8-Bit Harvard Architecture is linked with 8051 Architecture, 8051 Microcontroller and Microprocessors and Microcontrollers. Remember 07H for stack pointer reset.
8051 આર્કિટેક્ચર અંગે નીચેનાં વિધાનો ધ્યાનમાં લો:
1. તે 8-બિટ માઇક્રોકંટ્રોલર છે.
2. તેમાં હાર્વર્ડ આર્કિટેક્ચર છે.
3. તેમાં અલગ પ્રોગ્રામ અને ડેટા મેમરી સ્પેસ છે.
ઉપરોક્તમાંથી કયું/કયાં વિધાન સાચું/સાચાં છે?
જવાબ અને પગલાવાર ઉકેલ
D — 1, 2 અને 3. 8051 એ 8-બિટ, હાર્વર્ડ-શૈલીનું માઇક્રોકંટ્રોલર છે જેમાં કોડ અને ડેટા મેમરી સ્પેસ અલગ-અલગ છે.
વિગતવાર ઉકેલ (મૂળ ભાષામાં)
Statement-wise Verification
- Statement 1 - Correct.
It is an 8-bit microcontroller.
The classic 8051 is an 8-bit Harvard-style microcontroller with separate code and data spaces. - Statement 2 - Correct.
It has Harvard architecture.
The classic 8051 is an 8-bit Harvard-style microcontroller with separate code and data spaces. - Statement 3 - Correct.
It has separate program and data memory spaces.
The classic 8051 is an 8-bit Harvard-style microcontroller with separate code and data spaces.
Core Concept
The classic 8051 is an 8-bit Harvard-style microcontroller with separate code and data spaces. The standard core has 4 KB on-chip program ROM and 128 bytes internal RAM, supports external memory, multiple interrupts and configurable interrupt priority. On reset the stack pointer is 07H, so the first PUSH stores at 08H.
Formula / Key Relationship
Reset SP=07H; classic internal RAM=128 bytes; standard ROM=4 KB.
Why the Other Options Are Wrong
Option A is incorrect because it omits correct statement(s) 3. Option B is incorrect because it omits correct statement(s) 1. Option C is incorrect because it omits correct statement(s) 2.
Exam Shortcut / Approach
Remember 07H for stack pointer reset.
Common Mistake
00H is not the reset value of the 8051 stack pointer.
Quick Revision
8-Bit Harvard Architecture is linked with 8051 Architecture, 8051 Microcontroller and Microprocessors and Microcontrollers. Remember 07H for stack pointer reset.
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