User`s manual

Tracker3 User’s Manual 12
9. Hardware Description – T3-Mini
The T3-Mini is an embeddable tracker module measuring 1.72" by 1.12" (43mm
by 28mm) and weighing 5.5 grams.
The Mini features 13 general-purpose I/O pins (GP1 through GP12 and AUX)
and four analog inputs. Connections are made through 34 contacts in two rows
of 17, with a pitch of 0.1" and row spacing of 1" center to center. A mini USB type
B connector provides a simple connection for a PC.
All software functions of the full-size versions are retained.
9.1. Pin Assignments
A1-A4 Analog inputs 1-4 (max voltage 4xVdd)
1W Dallas 1-Wire data bus
SQL Squelch input
AUX Auxiliary I/O pin
GND Ground
RST Reset (active low)
B-RX Serial port B input
B-TX Serial port B output
A-RX Serial port A input
A-TX Serial port A output
CFG Configuration select
AOUT Audio output (to radio)
AIN Audio input (from radio)
GRN Green LED output for external LED
RED Red LED output for external LED
PTT Push-to-talk (open collector)
5V Regulator output or Vdd input, 5v max, 2.8v min
VIN Unregulated supply voltage, 6v to 28v
GP1-GP12 General purpose digital input/output pins