Assuming 8051 crystal frequency 11.0952MHz, what values do we need to load in Timer 1 registers, if we want to have a time delay 5msecs?
TH1 = EEH, TL1 = 01H TH1 = 238, TL1 = 0H TH0 = EEH, TL0 = 0H TH0 = EEH, TL = 0A
To calculate the values needed to achieve a 5ms time delay using an 11.0952MHz crystal frequency with 8051 microcontroller, we can follow these steps:
Calculate the machine cycle frequency: Crystal frequency = 11.0952MHz Machine frequency = Crystal frequency / 12 = 11.0952MHz / 12 =924.6kHz
Determine the number of machine cycles for a 5ms delay: Time delay = 5ms Required machine cycles = (Time delay * Machine cycle frequency) / 0 = (5ms * 924.6/ms) = 4623 cycles
Convert the required machine cycles into 16-bit values for Timer 1 (TH1 and TL1): timer count = 65536 - Required machine cycles = 65536 - 4623 = 60913 As a 16-bit value, 60913 is equal to EEB1HSo the values needed to load into Timer 1 registers for a 5ms time delay with an 11.0952MHz crystal frequency areTH1 = EEH TL1 = B1H
For the following piece of ALP in 8051 (Not a complete code), what is the Baud rate?
Org 0030H
MAIN: MOV TMOD, #20H
To determine the baud rate for the provided assembly language program snippet for the 8051 microcontroller, we will need information regarding the crystal frequency and the intended serial communication settings such as the (e.g., UART mode, etc.) and the desired baud value. Without this information, it is not possible to accurately calculate the baud rate based on the given code snippet alone.
If you can provide the crystal frequency and any additional details related to the program's baud rate configuration, I would be more than happy to assist you further in calculating the baud rate.
For the following piece of ALP in 8051 (Not a complete code), what is the Baud rate?
Org 0030H
MAIN: MOV TMOD, #20H
MOV TH1, #FAH MOV SCON, #50H SETB TR1
Baud Rate = 9600H Baud Rate = 4800 Baud Rate = 4800H Baud Rate = 9600
Based on the given assembly code snippet for the 8051 microcontroller, along with the provided baud rate options, it appears that the intended baud rate is 9600. This can be inferred from the value loaded into the TH1 register, which is 0xFA. In the 8051 microcontroller, the TH1 register is typically used to set the baud rate for serial communication, and the value loaded into TH1 is used to calculate the baud rate based on the crystal frequency. Therefore, the correct baud rate value from the options provided is 9600.
google.com
electronicwings.com
mcmaterial.files.wordpress.com
Find the time delay in secs (Excluding overhead due to instructions in the loop):
MOV TMOD, #10H
MOV R3, #200
AGAIN: MOV TL1, #08H
MOV TH1, #01H SETB TR1
BACK: JNB TF1, BACK
CLR TR1 CLR TF1 DJNZ R3, AGAIN
14.164024msecs 1.4164024secs 1416.4024μsecs None of the above
The time delay in seconds for the provided assembly code, excluding overhead due to instructions in the loop, is 1.4164024 seconds. This calculation is based on the number of iterations (R3 = 200) the timer values set for Timer 1 (TH1 = 0x01 and TL1 =0x08), assuming an 8051 microcontroller.
google.com
electronicwings.com
microcontrollerslab.com
If SP = 3FH, then at what memory location the SP is pointing to after the execution of the following command?
MOV R0, #32H
MOV R1, #3FH
MOV R3, #25H
PUSH R0
PUSH R1
PUSH 0E0H
POP R3
SP = 43H SP = 41H SP = 42H Invalid Syntax.
Given the initial value of the stack pointer (SP) as FH and the sequence of instructions provided, here's a step-step analysis to determine the memory location SP is pointing to after the execution:
After the of these commands, the SP will point to memory location H.
google.com
electronicsforyou.in
what-when-how.com
In mode 3 of serial communication which timer controls the baud rate? T0 in mode 1 T0 in mode 0 T1 in mode 2 T1 in mode 1
In mode 3 of serial communication in the 8051 microcontroller, Timer 1 (T1) controls the rate.
google.com
ebooks.inflibnet.ac.in
hackprojects.wordpress.com
in which mode ?
In mode 1, the 8051 timer can be utilized as a 16-bit timer to from 0000 to FFFFH, enabling the generation of a wide range of.
google.com
exploreembedded.com
embetronicx.com
Assuming 8051 crystal frequency 16MHz and following specifications determine the delay generated by Timer 0: Specifications: Timer Mode 0 is selected, TL0 = 62, TH0 = B8H
a None of the above b 19.93145mSec c 19.93145μSecs d 1.993145mSecs
The delay generated by Timer 0 in mode 0 for the given specifications (0 = 62, TH0 = B8H) a crystal frequency of 16MHz is:
Delay = (Timer - (TL0 + (256-TH0))* (1 / Crystal Frequency) Delay = (65536 - (62 + (-184))* (1/16000000) Delay ≈ 19.93145
Therefore, the correct answer is: b) 19.93145 milliseconds
google.com
electronicwings.com
microcontrollerslab.com
How the status of the carry, auxiliary carry and parity flags affected if we write the instruction?
MOV A, #9C
ADD A, #64H
CY=0, AC=0, P=0 CY=0, AC=1, P=0 CY=1, AC=1, P=1 CY=1, AC=1, P=0
When the instructions MOV A, #9C and ADD A, #64H executed in an 8-bit microprocessor, the status of the flags are as followsCY (Carry Flag) = 0 AC (Auxiliary Carry) = 0 P (ity Flag) = 0
Therefore, the correct option is: =0, AC=0, P=0
google.com
testbook.com
testbook.com
r2 = r3 * 105 can be solved by following?
RSB r2, r2, r3, LSL #4 and RSB r3, r2, r3, LSL #3 RSB r3, r2, r2, LSL #4 and RSB r2, r3, r3, LSL #3 RSB r1, r3, r3, LSL #3 and RSB r2, r1, r1, LSL #4 RSB r1, r3, r3, LSL #4 and RSB r2, r1, r1, LSL #3
The correct way to solve the equation r2 = r3 * 105 in ARM assembly language would be:
RSB r2, r3, r3, LSL #4 ; Multiply r3 by 16 and store the result in r2 (r2 = r3 * 16) RSB r2, r2, r3, LSL #2 ; Add r3 to r2 four times (r2 = r2 + (r3 * 16)) ADD r2, r3, r2, LSL #1 ; Add r2 to r3 two times (r2 = r3 + (r3 * 16) + (r3 * 16))
Thus, the correct sequence should be: RSB r2, r3, r3, LSL #4 ADD r2, r3, r2, LSL #4
google.com
arantxa.ii.uam.es
csie.ntu.edu.tw
there is no option as such choose the correct option from above options
Apologies, but it seems there might have been a mix-up. Currently, I don't have any options to select from. If you could provide me with the options or specific details for the question "r2 = r3 * 105 can be solved by following," I would be more than happy to assist you in selecting the correct solution.
google.com
ebooks.inflibnet.ac.in
hackprojects.wordpress.com
In ARM controllers the hardware multiplier unit is? Bit shifter Level shifter Multi shifter Barrel shifter
In ARM controllers, the hardware multiplier unit is commonly referred to as the "Barrel shifter". This component is responsible for executing shift operations on binary values in the processor.
google.com
comp.arch.narkive.com
developer.arm.com
You are given with the following instruction and you are provided the following data: ADD AX, [0123] SS = 1234H; CS= 4567H; DS = 5432 H Find the effective address location for the given instruction.
00123 H 01230 H 04567 H 54443 H
Based on the provided instruction "ADD AX, [0123]" and the given segment register values: SS = 1234H CS= 4567H DS = 5432 H
To calculate the effective address, the offset address from the instruction needs to be added to the value held in the segment register, in this case, the DS register.
The effective address can be calculated as: Effective Address = DS + offset address
Given that the offset address is 0123H and the DS register value is 5432H, the effective address is: Effective Address = 5432H + 0123H = 5555H
Therefore, the effective address location for the given instruction "ADD AX, [0123]" is 5555H.
google.com
people.scs.carleton.ca
geeksforgeeks.org
MOV 20H, #10H
MOV R0, #20H MOV A, @R0 The above statements results a value in A as?
10 20 10H 20H
The above sequence of instructions ultimately results in the value 10H being moved into the accumulator A.
google.com
sarlearningcenter.wordpress.com
amiestudycircle.com
In case of 8086, while realizing a 1MB of external memory using 128KB chips, how many chips and what is the decoder configuration required for selection of each memory chip?
6 chips and 3 х 8 decoder 6 chips and 2 х 4 decoder 8 chips and 3 х 8 decoder 8 chips and 2 х 4 decoder
To realize 1MB of external memory using 128KB chips in the 8086 system, we can use 8 memory chips, and a 3x8 decoder configuration for the selection of each memory chip. This arrangement allows for 8 chips, each with a 128KB capacity, to collectively provide the 1MB memory space required.
google.com
en.wikipedia.org
copyprogramming.com
MOV r0, #B5H
Back: DJNZ r0, back
ret
The above program requires how many machine cycles for its execution?
184 365 3 5
The provided program, consisting of the "MOV" and "DJNZ" instructions, will require 365 machine cycles for its execution.
google.com
hobbyprojects.com
keil.com
Delay: MOV r5, #02H
Here3: MOV r4, #180
Here2: MOV r3, #FFH
Here1: DJNZ r3, here1
DJNZ r4, here2 DJNZ r5, here3 RET
In Atmel 8051, the above program requires how much time for its execution?
199.206μs 1992.06μs 19920.6μs 199206μs
In Atmel 8051, the given program will require .206μs for its execution.
google.com
edaboard.com
copyprogramming.com
MOV 40H, #55H
MOV A, 40H
CPL A
The value in register A after the above program execution is?
40H AAH 04H 55H
The given program "MOV 40H, #55H, MOV A, 40H, CPL A" will result in the value 0AAH being stored in register A after the program's execution.
google.com
binujoy.files.wordpress.com
amiestudycircle.com
MOV r6, #C8H
Back: DJNZ r6, back
ret
In Atmel 8051, the above program requires how much time for its execution?
220.255μs 5.425μs 437.255μs 3.255μs
The provided program, which consists of the "MOV" instruction followed by a "DJNZ" loop, would take approximately 437.255μs to execute on an Atmel 8051 microcontroller.
google.com
what-when-how.com
win.tue.nl
In case of 8086, while realizing a 256KB of external memory using 64KB chips, the third chip address ranges from?
10000 – 1FFFFH 20000 – 2FFFFH 00000 – 0FFFFH 30000 – 3FFFFH
To realize 256KB of external memory using 64KB chips in the 8086 system, the address ranges for each chip would be as follows:
Therefore, the address range for the third chip is 20000 – 2FFFFH.
google.com
coursehero.com
en.wikipedia.org
In ARM controllers, in which mode the hardware circuit run the JAVA byte code?
User FIQ IRQ Jazelle
In ARM controllers, the hardware circuit runs the JAVA byte code in the Jazelle mode. Jazelle is an extension that allows some ARM processors to execute Java bytecode in hardware as a third execution state alongside the existing ARM and Thumb modes.
google.com
meseec.ce.rit.edu
developer.arm.com
MOV TL0, #52
MOV TH0, #76H
SETB TR0
Back: JNB TF0, Back
CLR TR0
CLR TF0
RET
In the above code, the timer in mode 1 provides a delay of?
382.74ms 38.274ms 3827.4ms 3.8274ms
To calculate the time delay provided by the given code, we first need to ascertain the number of clock cycles before the Timer 0 overflows. The crystal frequency for 8051 microcontrollers is typically 11.0592MHz, with each machine cycle taking 12 oscillator periods.
Given that the initial values for TH0 and TL0 are 76H and 52H respectively, and the timer operates in mode 1, which is a 16-bit timer mode, the time delay can be calculated using the following formula:
Delay = (65536 - Timer_count) × Machine cycle time
Firstly, we need to calculate the Timer_count:
Timer_count = 256 × TH0 + TL0 = 256 × 76H + 52H = 18724
Now, we can calculate the delay:
Delay = (65536 - 18724) × (1 / 11.0592MHz) × 12 = 46812 × (1 / 11.0592MHz) × 12 ≈ 3.8274ms
Therefore, the timer in mode 1 provides a delay of approximately 3.8274ms.
google.com
microcontrollerslab.com
d13mk4zmvuctmz.cloudfront.net
MOV TMOD, #32
MOV TH1, #05
SETB TR1
Back: JNB TF1, Back
CLR TR1
CLR TF1
RET
In the above code, the timer provides a delay of? 27.233μs 2723.3μs 272.33μs 2.7233μs
The given program configures Timer 1 in mode 2 and TH1 to 05H. In mode 2, timer uses an 8-bit counter with automatic reload. Using the provided information, we can calculate the delay as follows:
Timer Count = 256 - TH1 = 256 - = 251
Since the timer operates at 1.μs per machine cycle, the delay can be calculated as: Delay = Timer Count × Machine Cycle Time = 251 × 1.085μ ≈ 272.335μs
Therefore, the timer in the given code provides a delay of approximately 272.335μs.
google.com
microcontrollerslab.com
electronicwings.com
MOV SBUF, # “A”
Here: JNB TI, Here
In the above code, after reset if TI = 1 then what is the character in SBUF?
Nil A AAA AA
In the provided code, the instruction "MOV SBUF, #A'" moves the ASCII value of 'A' (which 41H in hex) into the SBUF (Serial Buffer register. Subsequently, the code creates a loop using the JNB instruction to repeatedly check the TI (Transmit Interrupt) flag. If the TI flag is initially set to 1 after reset, it indicates that the last data transmission is still in progress. Therefore, the character in the SBUF would not have been overwritten, and it will remain 'A' until the transmission is completed the TI flag gets cleared by the hardware. Hence, the character in SBUF would be 'A'.
google.com
what-when-how.com
faculty.kfupm.edu.sa
In Mode 0 of Timer 1 for a delay of 1ms what is the value to be loaded in TH1? 20 227 74 28
For mode 0 of Timer 1 in the 8051 microcontroller to achieve a delay of 1ms, we need to calculate the value to be loaded in TH1 register.
Firstly, we can calculate the machine cycle frequency:
Crystal Frequency: 11.0592 MHz Machine Cycle Frequency: Crystal Frequency / 12 Machine Cycle Frequency: 11.0592 MHz / 12 Machine Cycle Frequency: 921.6 kHz
Next, determine the number of machine cycles for a 1ms delay:
1ms is equal to 921.6 machine cycles.
To calculate the TH1 value, we can use the following formula:
TH1 = 256 - (Delay / (Machine Cycle Frequency / 1000))
TH1 = 256 - (1 / (921.6 / 1000)) TH1 ≈ 227
Therefore, the value to be loaded in TH1 for a 1ms delay in mode 0 of Timer 1 is approximately 227.
google.com
microcontrollerslab.com
care4you.in
Str r0, [r1, #4]! results to
r1 = r1 + 4 and r0 = r1 r1 = r1 + 4 and r1 = r0 r1 = r1 + 4 and *r1 = r0 *r0 = r1 and r1 = r1 + 4
The ARM assembly instruction "STR r0, [r1,4]!" results in the memory location at the address given by the value in register r1 plus 4 getting the of register r0, and the value in register r1 being by 4.
Therefore, the correct result is: "r1 = r1 + 4 and *r1 r0".
google.com
csie.ntu.edu.tw
azeria-labs.com
Str r0, [r1], #4 results to *r1 = r0 and r1 = r1 + 4 r1 = r1 + 4 and r0 = *r1 r1 = r0 and r1 = r1 + 4 r1 = r1 + 4 and *r1 = r0
The ARM assembly instruction "STR r0, [r1],4" signifies that the content of register r0 is stored in the memory location pointed to by the value in register r1, and then the value in register r1 is incremented 4.
Therefore, the correct result is: "*r1 = r0 and r1 r1 + 4"
google.com
csie.ntu.edu.tw
azeria-labs.com
Ldr r0, [r1, r2, LSL #3] results to
r0 = r1 + r2 * 3 r0 = *(r1 + r2 * 3) r0 = *(r1 + r2 * 8) r0 = r1 + r2 * 8
The instruction "LDR r0, [r1, r, LSL #3]" in ARM assembly language results in "r0" loaded with the value stored at the memory address calculated as "r1 + (r2 * 8)" due the left shift operation by 3. Therefore, the correct expression is: "r0 = *(r + r2 * 8)".
google.com
azeria-labs.com
cseweb.ucsd.edu