70009 Parallax Inc, 70009 Datasheet - Page 88

• Manufacturer Part Number: 70009
• Description: BOOK UNDERSTANDING SIGNALS
• Manufacturer: Parallax Inc
• Type: Signal Analysisr

Specifications of 70009

• Style: Book
• Title: Understanding Signals
• Contents: Guide to Generate, View and Measure Wave Forms
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Other names: 70009PAR

Summary
This chapter examined asynchronous serial communication protocol.
command was explained and used to generate inverted and non-inverted data signals, and
signals at different baud rates. The OPTAscope’s Horizontal dial, Zoom function, and
Vertical Bars cursors were employed to analyze a signal and determine an unknown baud
rate.
Exercises
Further Investigation
“BASIC Stamp User’s Manual” Version 2.0, Parallax, Inc., 2000
1. What is the bit-time for one bit sent at a baud rate of 9600 bps?
2. Use the BASIC Stamp Editor’s Help feature to look up the
3. Using the OPTAscope, measure the duration between two characters sent with
Find the Baudmode argument to send 8-bit no-parity true data at a baud rate of
2400. Use the OPTAscope to view and verify that the signal sent is the inverse
of that generated by the
two
The
examples that can be measured and observed with the OPTAscope.
available online from the Stamps in Class Curriculum menu on the Education
page at www.parallax.com.
SEROUT
SERIN
commands.
and
SEROUT
Baudmode
Command Reference sections provide numerous
argument 16780.
SEROUT
The
command.
SEROUT
It is