70009 Parallax Inc, 70009 Datasheet - Page 103

• Manufacturer Part Number: 70009
• Description: BOOK UNDERSTANDING SIGNALS
• Manufacturer: Parallax Inc
• Type: Signal Analysisr

Specifications of 70009

• Style: Book
• Title: Understanding Signals
• Contents: Guide to Generate, View and Measure Wave Forms
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Other names: 70009PAR

Now you can see a similar pulse train generated from the Sony remote control protocol
(Figure 7-11). As shown at the beginning of the chapter, the large pulse in the beginning
is the start pulse. Any pulses that are 0.6 ms wide are logic 0s. The 1.2 ms pulses are
logic 1s.
FOR counter = 0 TO 10
NEXT
DEBUG CR,CR,"Binary Value: ", BIN8 IR_message, CR
DEBUG "Decimal Value: ", DEC3 IR_message, CR
DEBUG "Without bit-7: "
DEBUG " ",DEC3 IR_message & %01111111,CR
RETURN
√
IF (IR_pulse(counter) < 450) THEN
ELSE
ENDIF
IR_message.LOWBIT(counter) = 0
IR_message.LOWBIT(counter) = 1
Point the handheld infrared remote control at the infrared detector and press “5”.
Figure 7-11:
Sony TV
remote key 5
pulse train