The Infrared Wireless Expert
ACT-IR8250P
Specification
2. Overview
The ACT-IR8250P
is a low cost, small pin-count, high-integration and in-system-programmable
micro-controller, with on-chip IrDA protocol stack and on-chip Infrared physical encoder/decoder. It
provides a serial interface to a host device that intends to have Infrared communication capability.
The host device can be any equipment or device that needs to communicate with IrDA enabled
portable or tablet PC, PDA, cellular phone and hand held data terminal, via IrDA beam and protocol
but has only a wired serial interface. The ACT-IR8250P will handle all the detail about IrDA protocol.
It sends/receives only user data to/from the host device via the wired serial interface with hardware
flow-control. IrDA has two modes; one is Primary, and the other is Secondary. The difference
between these two modes is that a Primary mode device initiates the discovery, negotiation and
connection sequence to Secondary mode device, and decides IrDA protocol parameters. Secondary
mode device always waits for commands from Primary mode device. Both modes can run different
protocols, and both may send or receive user data. ACT-IR8250P supports Secondary mode only.
Fig.1 is system diagram.
© Copyright 2003-2005 ACTiSYS Corp. Page 5 of 25
Jan 28, 2005
Rev. 0.44
