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Worksheets8255 PPI
Total questions: 10
Worksheet time: 5mins
All the functions of the ports of 8255 are achieved by programming the bits of an internal register called
data bus control
read logic control
control word register
none of the mentioned
The input provided by the microprocessor to the read/write control logic is
RESET
A1
WR(ACTIVE LOW)
All of the mentioned
The strobed input/output mode is another name of
mode 0
mode 1
mode 2
none
How many pins does the 8255 PPI IC contains?
24
20
40
32
In which mode do all the Ports of the 8255 PPI work as Input-Output units for data transfer?
BSR mode
Mode 0 of I/O mode
Mode 1 of I/O mode
Mode 2 of I/O mode
How many bits of data can be transferred between the 8255 PPI and the interfaced device at a time? or What is the size of internal bus of the 8255 PPI?
16 bits
12 bits
8 bits
None of the above
Which port of the 8255 PPI is capable of performing the handshaking function with the interfaced devices?
Port A
Port B
Port C
All of the above
In mode 2 of I/O mode, which of the following ports are capable of transferring the data in both the directions?
Port A
Port B
Port C
All of the above
How many ports 8255A has?
2
3
4
5
In BSR mode, only port C can be used to
set individual ports
reset individual ports
set and reset individual ports
programmable I/O ports
