Question
Download Solution PDFMatch List I with List II
List I |
List II |
(a) Reset |
(i) 001B |
(b) External hardware int. 0 (INT0) |
(ii) 0003 |
(c) Timer 0 interrupt (TF0) |
(iii) 000B |
(d) Timer 1 interrupt (TF1) |
(iv) 0000 |
Choose the correct answer from the options given below:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDF- 8051 microcontroller has 5 interrupt signals: INTO, TFO, INT1, TF1, RI/T1.
- Each interrupt can be enabled or disable by setting bits of the IE register and the whole interrupt system can be disabled by clearing the EA bits of the same register.
- If INTO, TFO, and INT1 are activated at the same time then they are latched and kept internally.
Explanation:
Interrupt |
Flag |
Vectored address |
Reset |
- |
0000H |
INTO(ext int, 0) |
IEO |
0003H |
Timao |
TFO |
000BH |
INT 1 (ext int.1) |
IE1 |
0013H |
Timer 1 |
TF1 |
001BH |
Serial |
TI/RI |
0023H |
Extra point about 8051 microcontrollers:
- It is an 8-bit microcontroller
- It has a 4 kB ROM store, and 40 pins microcontroller (used only 32 pins)
- Two 8/16 bit timers
- 64k data memory space.
- 8051 may also have a special feature like UARTs ADC, op-amps. etc.
- Full duplex-serial data transfer.
Last updated on Jun 11, 2025
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