4
3-4200-D1-2.0-0403
STIr4200
USB/IrDA Bridge Controller
OFFICIAL
PRODUCT
DOCUMENTA TI ON
2. PRODUCT OVERVIEW
2.1.
Features
•
Low-power CMOS design
•
IrDA data rates from 2.4 Kbps to 4 Mbps
•
Obtains power from USB port
•
Uses standard IrDA transceivers
•
Optional LED driver for additional flexibility
–
LED driver capable of > 650 ma @ 5V, 25% duty cycle
•
Full compliance to IrDA 1.3 and USB 1.1 specifications
•
4 Kbyte FIFO buffer memory
•
Requires a single 12 Mhz crystal
•
Windows 98/98SE/ME/2000/XP™ NDIS/USB driver
•
Low-profile 28-Pin SSOP package
2.2.
Description
The SigmaTel STIr4200 is a low cost, low power, USB/IrDA Bridge Controller inte-
grated circuit for enabling IrDA wireless data communications through a standard
PC USB port. The STIr4200 directly interfaces to both single path and dual path
receive IrDA transceiver module architectures and contains a USB controller, IrDA
controller, interface logic, and memory buffer for full IrDA 1.3, 4 Mbps data transfer
rates. A block diagram is hown in Figure 1.
The STIr4200 is bundled with a Windows 98/98SE/ME/2000/XP™ NDIS/USB driver
for enabling the implementation of a cost effective USB/IrDA Adapter solution for
wireless data communications.
2.3.
Ordering Information
Part Number
Package
Temp Range
Supply Range
STIr4200S
28-Pin SSOP
0° C to +70° C
Vdd = 3.1 - 3.6V
Infrared
Communication
Transmission
Infrared
Transceiver
SigmaTel USB/
IrDA Bridge
Controller
Data
Transfer
USB
Connection
to the PC