STIR4220

PRODUCT BRIEF STIR4210/STIR4220 Integrated Mixed-Signal Solutions USB 2.0 Hi-Speed to IrDA Bridge DESCRIPTION The SigmaTel STIR4210 and STIR4220 are low power, USB 2.0 Hi-Speed IrDA Bridge Controller integrated circuits for enabling USB IrDA communication solutions. The STIR4210/STIR4220 connect directly to the USB Bus and provide all functionality necessary between the USB 2.0 and an IR transceiver. A USB IR communication subsystem can be implemented by adding an IR transceiver, a 24 MHz crystal, and a few passive components for bypass and power filtering. The STIR4210/STIR4220 are compatible with the IrDA Serial Infrared Physical Layer Specification Version 1.4. The STIR4210 supports data rates up to 4 Mbits per second (FIR) and the STIR4220 supports data rates up to 16 Mbits per second (VFIR) including FIR. Both devices support all of the lower data rates defined by the IrDA specification (SIR and MIR). The STIR4210/STIR4220 implement a USB 2.0 Hi-Speed device controller including integrated PHY/ transceivers, an IR Protocol Controller, a programmable microcontroller, memory for program and buffering, and voltage regulators required for the typical USB based Infrared subsystem. A high performance microcontroller provides control functions. On-chip program ROM and program/data RAM eliminates the need for external components. RAM is used for data, buffering, and ROM patch. The IR Protocol Controller supports the IrDA encode and decode operations required by the various dat...