28123 Parallax Inc, 28123 Datasheet - Page 78

• 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

Q8. No. The largest value a byte can hold is 255. The value 500 is out of range for a
Q9.
E1. The
E2. The
P1. The bi-color LED schematic, on the left, is unchanged from Figure 2-20 on page
byte.
HIGH 7
P13,
to be modified to count from 1 to 5000).
64. The yellow LED schematic is based on Figure 2-11 on page 48. For this
project P14 was changed to P13.
' What's a Microcontroller - Ch02Prj01_Countdown.bs2
' 10 Second Countdown with Red, Yellow, Green LED
' Red/Green:
' {$STAMP BS2}
' {$PBASIC 2.5}
DEBUG "Program Running!"
counter VAR Byte
P15
P14
counter VAR Word
FOR counter = 1 to 5000
NEXT
P13
counter
DEBUG ? counter, CR
HIGH 14
PAUSE 500
LOW 14
PAUSE 500
PAUSE Duration
HIGH 14
will cause the BASIC Stamp to internally connect I/O pin P7 to Vdd.
470 Ω
LED
Red
470
variable has to be changed to
and
Bicolor LED on P15, P14. Yellow: P13
Ω
LOW 14
1
2
Vss
must be reduced to 500ms / 4 = 125ms. To use I/O pin
have been replaced with
Green
LED
LED
P13
Word
DO
LOOP
HIGH 13
PAUSE 125
LOW 13
PAUSE 125
size, and the
HIGH 13
470
Ω
and
Vss
FOR
LOW 13
statement has
Yellow
LED
.