28123 Parallax Inc, 28123 Datasheet - Page 290

• Manufacturer Part Number: 28123
• Description: TEXT WHAT'S A MICROCONTROLLER
• Manufacturer: Parallax Inc
• Type: Programmingr

Specifications of 28123

• Style: Book
• Title: What's a Microcontroller?
• Contents: Whats a Microcontroller? Text
• Product: Microcontroller Accessories
• Core Processor: PIC16C57c
• Flash: 128 Bytes
• Operating Supply Voltage: 9 V
• Board Size: 31 mm x 16 mm
• Lead Free Status / RoHS Status: Not applicable / Not applicable

Pushbutton Circuit Parts
(2) Pushbuttons – normally open
(2) Resistors – 10 kΩ (brown-black-orange)
(2) Resistors – 220 Ω (red-red-brown)
(2) Jumper wires
Building the First Pushbutton Circuit
Build the pushbutton circuit shown in Figure 10-2.
Figure 10-2
First Pushbutton Circuit
Testing the First Pushbutton Circuit
Writing a program to test this circuit should be very simple by now, especially since
you’ve already done it before.
Example Program: ReadPushbuttonState.bs2
This is a repeat of the program for testing pushbuttons from Chapter #3:
P3
√
√
√
Enter and run the ReadPushbuttonState.bs2.
Verify that the BASIC Stamp is able to read the pushbutton.
Correct any problems you catch before moving on to the next circuit.
220
Ω
Vss
10
kΩ
Vdd
P15
P14
P13
P12
P11
P10
P9
P8
P7
P6
P5
P4
P3
P2
P1
P0
X2
X3
Vdd
Vin
Vss