28123 Parallax Inc, 28123 Datasheet - Page 270

• 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

Chapter #9: Electronic Building Blocks
THOSE LITTLE BLACK CHIPS
You need look no further than your BASIC Stamp (see Figure 9-1) to find examples of
“those little black chips”. Each of these chips has a special function. The upper-right
chip is the voltage regulator. This chip takes the battery voltage and converts it to almost
exactly 5.0 V, which is what the rest of the components on the BASIC Stamp need to run
properly. The upper-left chip is the BASIC Stamp module’s EEPROM. PBASIC
programs are condensed to numbers called tokens that are downloaded to the BASIC
Stamp. These tokens are stored in the EEPROM, and you can view them by clicking Run
and then Memory Map in the BASIC Stamp Editor. The largest chip is called the
Interpreter chip. It fetches the tokens from the EEPROM and then interprets the PBASIC
command that the token represents. Then, it executes the command, fetches the next
token, and so on. This process is called “fetch and execute”.
Figure 9-1
Integrated
Circuits on the
BASIC Stamp