2007-11-19
Page 7 of 35
IT321_Tech_doc_12
1. GENERAL
DESCRIPTION
The Fastrax IT321 is an OEM GPS receiver module, which provides
the SiRFstarIII receiver
(ref I)
functionality using the state of the art
SiRF GSC3LT chip. The module has tiny form factor 10.4x14.0mm,
height is 2.3mm nominal (2.6mm max). The Fastrax IT321 receiver
provides low power and very fast TTFF together with weak signal ac-
quisition and tracking capability to meet even the most stringent per-
formance expectations.
The module is available with two versions:
•
SiRF ROM code version
•
Early samples can be provided with embedded flash version
(4Mbit in GSC3LTf) for evaluation with GSWLT3 firmware.
The module provides complete signal processing from antenna input
to serial data output in either NMEA messages
(ref II)
or in SiRF bi-
nary protocol
(ref III)
. The module requires a main power supply VDD,
which can be powered directly from a raw battery voltage. The Fas-
trax IT321 module interfaces to the customer’s application via one se-
rial port. Serial data and I/O signal levels are 1.8V or 1.2V CMOS
compatible.
The antenna input supports passive and active antennas and provides
also an internally generated antenna bias supply.
This document describes the electrical connectivity and main func-
tionality of the Fastrax IT321 OEM GPS Receiver module.
Summary of Contents for IT321
Page 15: ...2007 11 19 Page 15 of 35 IT321_Tech_doc_12 Figure 2 SiRFFlash utility settings...
Page 25: ...2007 11 19 Page 25 of 35 IT321_Tech_doc_12 Figure 7 Tape and reel specification...
Page 32: ...2007 11 19 Page 32 of 35 IT321_Tech_doc_12 7 3 Circuit drawing rev C...
Page 34: ...2007 11 19 Page 34 of 35 IT321_Tech_doc_12 7 6 Artwork layer 2 rev C 7 7 Artwork layer 3 rev C...
Page 35: ...2007 11 19 Page 35 of 35 IT321_Tech_doc_12 7 8 Artwork layer 4 Bottom rev C...
