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SmarTire Systems Inc.  
Tire Monitoring System Reference Manual
 
 
 
 6/13/2000     Page 49 of 55 
This manual is under review by SmarTire – DO NOT ISSUE 
Connection to External Systems 
 
Interface; IPC to RS232 
 
GEN II BATTERY CONNECTOR PIN DESIGNATIONS 
 
 
 
 
 
 
 
 
Battery connector as seen from  
 
 
 
 
 
the rear of PCB. 
 
 
 
 
 
PIN #   
DESIGNATIONS 
 
Open collector output (P2-4) - Diagnostic 
E-I2C-CLK Communication (Clock) 
Open collector output (P2-2) – Pressure alert 
E-I2C-DAT Communication (Data) 
No Connection 
No Connection 
Vin (supply voltage) 
Ground 
Battery pack input (4.5V) 
10 
Ground 
 
 
Note: 
a)  All open collector outputs can drive up to 50 mA max.  
b)  Communication lines are level shift protected. 
c)  Vin (supply voltage 8.5Vdc to 26 Vdc max. 
d)  Battery pack is comprised of 3 – 1.5V AA batteries (4.5Vdc) 
e)  Connector used on  Receiver PCB: SAMTEC:TML-105-02-G-D-RA 
f)  Mating connector for above: SAMTEC:SMS-105-01-G-D