11.1
Overview
The FIR module is fully IrDA1.1 compliant, and supports the serial infrared link at 288Kbit,
576Kbit, 1.152Mbit and 4Mbit. The three lower speeds are complied with Synchronous Data Link
Control (SDLC) protocol, a packet with start/stop flags delimiting a data packet encoded by zero-
insertion. The 4Mbit protocol uses an optical preamble and start/stop flags to delimit the 4 Pulse
Position Modulated (4 PPM) packet data.
11.1.1
Features
• Supports HPSIR or ASKIR infrared interface
• Supports MIR and FIR
• Provides DMA channel mode for FIR, and DREQ0# is used
Section 11 FIR Module
Rev. 3.0, 03/01, page 129 of 390