Basics
What is the size of 8051 Microcontoller?
8 bit
Mention the two 16 bit registers available in 8051 microcontoller?
Program counter and Data pointer registers
MOV A,20h This instruction is in which addressing mode?
Direct addressing mode
How many timers are available in 8051 microcontoller?
2
How many ports are available in 8051 microcontroller?
4
What is size of address bus and data bus in 8051 Microcontroller?
16 bit address bus and 8 bit data bus
How many Register banks are available in 8051 Microcontroller?
4 Register banks
MOV A,@ RO This instruction is in which addressing mode?
Register indirect Addressing mode
Which are the special function register used for serial transmission?
SBUF and SCON Register
How many rotors and stators are available in typical stepper motor?
1 rotor and 4 stator
Which is the register which is pointing towards the starting address of stack?
Stack Register
Which register is used to access the external memory in 8051 Microcontroller?
DPTR
ADD R0,# 12h This instruction is in which addressing mode?
Immediate AM
Which is register which is used to set various timer modes in 8051 Microcontroller?
TMOD register
Which is the device which is used to convert digital signals to analog signals
Digital to Analog converter
What is pin package of the 8051 Microcontroller ?
40 pin
After reset, SP register is initialized to which address?
07h
Which instruction is used to store the data temporarily in stack memory
PUSH instruction
Auto reload mode is allowed in which mode of the timer?
Mode 2
When is the function of the WR pin in ADC0804?
WR pin’s active low input tells ADC0804 about the start of conversion.
In 8 bit signed number operations, when is OV flag is set to 1 ?
When a carry is generated from D6 to D7 bit
What is the address range of SFR Register bank?
80-0FFh
When we add two numbers the destination address must always be in which register?
Accumulator
TF1, TR1, TF0, TR0 bits are of which register?
TCON
How many discrete voltages are available in 8 input DAC?
256 voltage levels