STIR4210 Datasheet | SigmaTel

PRODUCT BRIEF STIR4210/STIR4220 Integrated Mixed-Signal Solutions USB 2.0 Hi-Speed to Ir DA Bridge DESCRIPTION The Sigma Tel STIR4210 and STIR4220 are low power, USB 2.0 Hi-Speed Ir DA Bridge Controller integrated circuits for enabling USB Ir DA munication 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 munication subsystem can be implemented by adding an IR transceiver, a 24 MHz crystal, and a few passive ponents for bypass and power filtering. The STIR4210/STIR4220 are patible with the Ir DA 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 Ir DA 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 ponents. RAM is used for data, buffering, and ROM patch. The IR Protocol Controller supports the Ir DA encode and decode operations required by the various data rates and allows the STIR4210/STIR4220 to interface to a wide range of IR capable devices at the highest performance. Unframed transfers are supported for proprietary and remote control applications. GPIO pins support the control of external functions. These pins include an activity LED and pins for transceiver ID. These pins can be used so that the driver can detect which transceiver is used and configure performance parameters if necessary. An integrated PLL generates all on-chip clocks...