30010 Parallax Inc, 30010 Datasheet - Page 4

• Manufacturer Part Number: 30010
• Description: BASIC STAMP LOGIC ANALYZER
• Manufacturer: Parallax Inc

Specifications of 30010

• Accessory Type: Logic Analyzer
• Product: Microcontroller Accessories
• Interface Type: USB
• Flash: 128 Bytes
• Operating Supply Voltage: 0.8 V
• Board Size: 32.15 mm x 20 mm x 17 mm
• For Use With/related Products: BASIC Stamp®
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: Q2119020A

Acquisition Controls
To acquire a signal, press the “Acquire” button. Use the pull-down menu to select the number of samples
you would like to acquire, between one million and the maximum shown. The maximum sample buffer
size will depend on the amount of available RAM in your PC. These samples will be stored in your PC’s
RAM as they are captured.
Parallax, Inc. • BASIC Stamp Logic Analyzer (#30010) • 02/2005
In the BSLA default state, it will start capturing data as soon as the “Acquire” button is
pressed. However, sometimes it is desirable to wait until a certain event on a signal line
occurs before the sampling begins. This can be done using the Trigger settings, which are
just to the right of the signal names as shown below.
You can trigger on any level combination on any of the 20 signals. For example, if you
want to trigger on the first time where P0 is sampled low, set the first position low
following the P0 label by clicking the high label until it looks low (see graphic examples
below). When you press “Acquire”, the BSLA will wait until the P0 signal is low. Once it is
low, it will trigger and store an entire buffer of samples. The buffer will display the Trigger
cursor (red marked with a “T”) showing the position that the trigger occurred. If you would
like to trigger on a falling edge, not just the next low sample, then use the combination of
high and low. If you would like to trigger on the next rising edge, select a low followed by
a high level.
The “Trigger Position” scrollbar lets you choose the relative location of the trigger within
the sample buffer. To see what happens before the trigger, put the trigger position over to
the right. Most of the captured samples will then be samples before the trigger occurs. To
view samples that occur after the trigger position, place the Trigger Position at the left side
(at the beginning of the buffer) and most of the samples will be samples taken after the
trigger occurs.
No trigger
Low symbol
High and low combination triggers on a falling edge
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