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paper of Embedded 8051, LCD .

Exam section of megasasta.com

Paper of 8051, LCD in Embedded

Course=Embedded
Subject=8051, LCD

Question no-1
Count<=4; instruction in 8051 using embedded c will


Optional Answers

(a)                  Shift the content of "Count" variable by 4 to left

(b)                  Value in "Count" variable will be replaced by 4

(c)                  No effect on variable "Count"

Sollution

(a)                  Shift the content of "Count" variable by 4 to left

Question no-2
Z index in 128x64 graphical LCD is use for


Optional Answers

(a)                  Shift all the pages vertically down or up

(b)                  Shift all the pages horizontally

(c)                  Shift the display to left

(d)                  Shift the display to right

Sollution

(a)                  Shift all the pages vertically down or up

Question no-3
After reading last byte of data from 24c02 eprom master sends


Optional Answers

(a)                  Acknowledgement bit 0

(b)                  Acknowledgement bit 1

(c)                  Send confirmation byte

(d)                  Another data to write

Sollution

(b)                  Acknowledgement bit 1

Question no-4
Sbit new=P2^6 in 8051 using embedded c will


Optional Answers

(a)                  Assign create a new pin

(b)                  Change pin address

(c)                  Assigns a name "new" to pin6 of port2

(d)                  None of the above

Sollution

(c)                  Assigns a name "new" to pin6 of port2

Question no-5
How to write interrupt 0 sub routine in embedded c for 8051 controller in keil


Optional Answers

(a)                  Call a function from main

(b)                  Create a function name isr

(c)                  write " interrupt 0" just after the name of function

(d)                  Can not write interrupt 0 sub routine in embedded c for 8051

Sollution

(c)                  write " interrupt 0" just after the name of function

Question no-6
TR0 in 8051 is


Optional Answers

(a)                  Bit to start/stop timer0

(b)                  Byte to start/stop timer0

(c)                  Not available in 8051

(d)                  It is a char type variable in embedded c

Sollution

(a)                  Bit to start/stop timer0

Question no-7
SCON register in 8051 is


Optional Answers

(a)                  Serial control register

(b)                  Set configuration of timers

(c)                  Not available in 8051

(d)                  Can be a int type variable in embedded c

Sollution

(a)                  Serial control register

Question no-8
V0 (Pin no 3) in 128x64 graphical LCD is


Optional Answers

(a)                  Used to change pixel size of LCD

(b)                  To change the contrast of LCD

(c)                  ON/OFF the LCD

(d)                  Shift display

Sollution

(b)                  To change the contrast of LCD

Question no-9
Size of Command in CS5460 is


Optional Answers

(a)                  24 bits

(b)                  8 bits

(c)                  16 bits

(d)                  12 bits

Sollution

(b)                  8 bits

Question no-10
RS bit of 16x2 LCD is


Optional Answers

(a)                  Register Select

(b)                  Register Show

(c)                  RAM Show

(d)                  RAM Search

Sollution

(a)                  Register Select

Jai guru dev

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