Question no-1
General purpose RAM available in ds1307 for 8051
Optional Answers
(a) 1Mbyte
(b) 2Mbyte
(c) 56Bytes
(d) 256Bytes
Sollution
(c) 56Bytes
Question no-2
Crystal frequency required in DS1307 is
Optional Answers
(a) 13.876Khz
(b) 13.768Khz
(c) 13.5KHz
(d) 13.768Mhz
Sollution
(b) 13.768Khz
Question no-3
Priority of hardware interrupt in 8051 is set by SFR
Optional Answers
(a) SBUF
(b) SCON
(c) PCON
(d) IP
Sollution
(d) IP
Question no-4
24C02 having
Optional Answers
(a) 56 Bytes of memory
(b) volatile memory
(c) non volatile memory
(d) RAM
Sollution
(c) non volatile memory
Question no-5
UART in 8051 divides clock by
Optional Answers
(a) 2
(b) 8
(c) 16
(d) 32
Sollution
(d) 32
Question no-6
output on P0 in below code of 8051 if a=220
if(a&0x80)
P0=0x55;
else
P0=0xaa;
Optional Answers
(a) 0xFF
(b) 0x00
(c) 0x55
(d) 0x20
Sollution
(c) 0x55
Question no-7
Special function associated with P3.3 of 8051 is
Optional Answers
(a) Interrupt 1 of 8051
(b) Serial port of 8051
(c) SBUF of 8051
(d) none of the above
Sollution
(a) Interrupt 1 of 8051
Question no-8
0x06 command in 16x2 LCD stands for
Optional Answers
(a) Display on
(b) Right shift
(c) Cursor blinking
(d) none of the above
Sollution
(b) Right shift
Question no-9
Which particular port is not having internal pull up in 8051
Optional Answers
(a) Port 0
(b) Port 1
(c) Port 2
(d) Port 3
Sollution
(a) Port 0
Question no-10
X address in graphical LCD(128x64) represents
Optional Answers
(a) shifting
(b) scrolling
(c) page
(d) none of the above
Sollution
(c) page
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