Tire Pressure Monitoring System User’s Guide
FIGURE 3-2:
SENSOR MODULE FLOW CHART
Module Initialization
Any Incoming
LF Challenge
Command?
Yes
Valid Challenge
Command?
Yes
Wake Up PIC
From Sleep Mode
Read Incoming
Messages
Learn Mode
No
Command
Recv?
Yes
Save New ID
No
Measure Battery
Level
No
Battery Level
Okay?
Yes
No
LF INT
Clear Vlow Flag
Measure Pressure
Set Vlow Flag
Measure
Temperature
Perform
Compensation
Routine
Transmit Data to
BaseStation
Enter Sleep Mode
DS51624B-page 16
? 2006 Microchip Technology Inc.
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