DeVry ECET 365 ECET/365 ECET365 WEEK 2 HOMEWORK Solution

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ECET 365 Week 2 Homework Assignment

Pages 384 – 387, Problems 7.1, 7.4, 7.9, 7.13, D7.17.

Page 639, Problems 12.1 – 12.5.

 

Pages 384 – 387, Problems 7.1, 7.4, 7.9, 7.13, D7.17.

7.1  For each term, give a definition in 32 words or less.

7.4 Look up in the 9S12 data sheet how the SCI checks for noise. In particular, when is the noise flag set? How does software clear the noise flag?

7.9 Consider a serial port operating with a baud rate of 1000 bits per second. Draw the waveform occurring at the PS3 output (voltage levels are +5 and 0) when the ASCII ‘B’ ($42) is transmitted on SCI1. The protocol is one start, eight data, and one stopbit. SCI1 is initially idle, and the software writes the $42 to SCI1DRL at time = 0. Show the PS3 line before and after the frame, assuming the channel is idle before and after the frame.

7.13 A slave device will be interfaced to the Master9S12 using SPI. The timing is shown in Figure 7.62. There are three signals that will be outputs of the 9S12 and inputs to the device (Enable, Clock, and Data). The timing of the external device is shown below. What CPHA, CPOL mode should you use?

D7.17 Interface an 8-bit serial device using SPI. The control pin is interfaced to PT2, and the clock and data signals are connected to the SPI. The control and clock signals are normally high. The SPI needs to clock data out on the falling edge of the clock. The clock and data are created by the real SPI, and the control signal is bit-banged. The maximum clock frequency is 1 MHz.

Page 639, Problems 12.1 – 12.5.

12.1 For each term, give a definition in 32 words or less.

12.2 For each transducer parameter, give a definition in 32 words or less.

12.3 For each instrument parameter, give a definition in 32 words or less.

12.4 For each transducer, give its measurand

12.5 For each concept, give a definition in 32 words or less.