28123 Parallax Inc, 28123 Datasheet - Page 51

• 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

Figure 2-6 shows a circuit schematic, and a picture of how that circuit will look when it is
built on the prototyping area. The breadboard is separated into rows of five sockets.
Each row can connect up to five leads, or wires, to each other. For this circuit, the
resistor and the LED are connected because each one has a lead plugged into the same 5-
socket row. Note that one lead of the resistor is plugged into Vdd so the circuit can draw
power. The other resistor lead connects to the LED’s anode lead. The LED’s cathode lead
is connected to Vss, or ground, completing the circuit.
You are now ready to build the circuit shown in Figure 2-6 (below) by plugging the LED
and resistor leads into sockets on the prototyping area. Follow these steps:
√
√
√
√
√
Disconnect power from your Board of Education or HomeWork Board.
Use Figure 2-4 to decide which lead is connected to the LED’s cathode. Look
for the shorter lead and the flat spot on the plastic part of the LED.
Plug the LED’s cathode into one of the black sockets labeled Vss on the
prototyping area.
Plug the LED’s anode (the other, longer lead) into the socket shown on the
breadboard portion of the prototyping area.
Plug one of the resistor’s leads into the same breadboard row as the LED’s
anode. This will connect those two leads together.
Input/output pins are usually called I/O pins, and after connecting your circuit to one or
more of these I/O pins, you can program your BASIC Stamp to monitor the circuit (input) or
send on or off signals to the circuit (output). You will try this in the next activity.
P15
P14
P13
P12
P11
P10
P9
P8
P7
P6
P5
P4
P3
P2
P1
P0
X2
X3
Vdd
Vin
Vss
Figure 2-5
Prototyping Area
Power terminals (black
sockets along top), I/O pin
access (black sockets along
the side), and solderless
breadboard (white sockets)