Question 1

8255 has -------- i/o pins
A)28
B)26
C)24
D)22

Accepted Answer

The 8255 Programmable Peripheral Interface (PPI) chip has 24 I/O (Input/Output) pins, divided among three 8-bit ports (Port A, Port B, and Port C).

Question 2

8255 has three ----parallel ports
A)8 bit
B)16 bit
C)32 bit
D)64 bit

Accepted Answer

8255 is a programmable peripheral interface device that provides three 8-bit parallel ports for interfacing between a microprocessor and peripheral devices.

Question 3

In 8255 ,BSR means -----
A)bit set/reset
B)byteset/reset
C)binary set/reset
D)none

Accepted Answer

BSR in 8255 stands for Bit Set/Reset, which allows individual bits of a port to be set or reset.

Question 4

BSR mode is used to set or reset the bitsin
A)portA
B)portB
C)portC
D)portD

Accepted Answer

BSR (Bit Set Reset) mode is used to set or reset the bits in port C of a microcontroller.

Question 5

8255 has ----i/o modes
A)2
B)3
C)4
D)8

Accepted Answer

8255 Programmable Peripheral Interface (PPI) has 3 I/O modes: Mode 0 (Basic I/O), Mode 1 (Strobed I/O), and Mode 2 (Bi-directional I/O).

Quiz 1: I/O, Communication, and Timerscounters of 8255 and ADC 0808

8255 has -------- i/o pins

8255 has three ----parallel ports

In 8255 ,BSR means -----

BSR mode is used to set or reset the bitsin

8255 has ----i/o modes