28123 Parallax Inc, 28123 Datasheet - Page 236

• 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

If you’ve ever heard a singer practice his/her notes by singing the Solfege, “Do Re Mi Fa
Sol La Ti Do”, the singer is attempting to match the notes that you get from striking the
white keys on a piano keyboard. These white keys are called natural keys. A black key
on a piano can either be called sharp or flat. For example, the black key between the C
and D keys is either called C-sharp (C
flat depends on the particular piece being played, and the rules for that are better left to
the music classes.
C6 D6 E6 F6 G6
C
D
or
6
#
6
b
D
or
E
6
#
6
b
Figure 8-3: Rightmost Piano Keys and Their Frequencies
G
F
or
6
#
6
b
G
6
#
or
A
6
b
A6
#
A
B
) or D-flat (D
6
#
or
6
b
B6
C7
C
D
7
#
or
7
b
D7
b
). Whether a key is called sharp or
D
or
E
7
#
7
b
E7 F7 G7
G
F
7
#
or
7
b
G
A
7
#
or
7
b
A7 B7
A
B
7
#
or
7
b
C8