NEW
Font size
WorksheetsMicroprocessor
Total questions: 15
Worksheet time: 8mins
Expand USART
Uniform Synchronous Asynchronous Radio Transceiver
Universal Synchronous Asynchronous Radio Transceiver
Universal Synchronous Asynchronous Radio Transmitter
Universal Synchronous Asynchronous Receiver Transmitter
Which one of the Following is USART?
8221
8231
8261
8251
Which of the following is not a mode of data transmission?
Simplex
Duplex
Semi Duplex
Half duplex
In 8251A, the pin that controls the rate at which the character is to be transmitted is
TXC(active low)
TXC(active high)
TXD(active low)
RXC(active low
TXD(Transmitted Data Output) pin carries serial stream of the transmitted data bits along with
Start bit
Stop bit
Parity bit
All of the mentioned
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 transmitter section converts a________word received from microprocessor to ________bits & transmits them over the TxD line to the peripheral.
Parallel, Serial
Serial, Parallel
Serial, Serial,
Parallel, Parallel
Which one of the following is a Parallel communication interface
8155
8255
8o85
8086
PPI Stands for
Programmable Peripheral Interface
Peripheral Programmable Interface
Programmed Post Interface
Post Programmable Interface
8255 has ___________________ pins
20
28
30
40
8251 A has _____________ pins
20
28
40
48
DSR Stands for
Data Sent Ready
Data Set Ready
Data Sent Receive
Data Sequence Receive
Mode Instruction in the control word is used for
Setting of Function
Setting of Operation
Setting of Action
All the Above
ADC stands for
All Digital Coding
Analog to Digital Coding
Analog to Digital Convertor
Analog to Data Convertor
OE Stands for
Overflow Error
Overrun Error
Overflow enable
Overrun Enable
