ASSIGNMENT 8
Textbook Assignment: “Input/Output (I/O) and Interfacing,” chapter 7—continued, pages 7-20 through
7-38.
8-1.
8-2.
8-3.
The read/write control logic accepts control
signals from which of the following
devices?
1. The data bus
2. The control bus
3. The master clock
4. The USART
To program the USART for the applicable
interface when it is in an idle state, which
of the following signals/words is required?
1. A reset signal
2. A clock signal
3. A new set of data words
4. A new set of control words
The universal synchronous-asynchronous
receiver transmitter is enabled for
reading/writing operations when which of
the following signals is true?
1. The WRITE DATA
2. The CHIP SELECT
3. The CONTROL DATA
4. The DATA SET READY
8-4.
8-5.
8-6.
8-7.
62
When the WRITE DATA (WD) signal is
true, it means which of the following
things?
1. It indicates the microprocessor is
placing data on the data bus
2. It indicates the microprocessor is
ready to receive data or control words
3. It identifies the write operation as a
data or control word
4. It enables the universal
synchronous/asynchronous receiver
transmitter for writing operations
When the READ DATA (RD) signal is
true, the microprocessor is ready for which
of the following activities?
1. To receive data only
2. To receive status words only
3. To receive data and status words
4. To receive clock signals
The transmit control logic converts the data
bytes stored in the transmit buffer into
which of the following forms?
1. An asynchronous bit stream
2. Start bits
3. Stop bits
4. Parity bits
A start bit is used for which of the
following purposes?
1. To initiate data transfer
2. To alert the output device
3. To control transmit logic
4. To program protocol
