Supports high-speed IrDA infrared controllers for Linux operating systems

Sigmatel introduces the high-speed IrDA infrared controller stir4220 and stir4210, which supports Macintosh software drivers and Linux operating systems. stir4220 is a fast infrared (vfir) controller with a speed of 16 Mbps, while stir4210 is a fast infrared (FIR) controller with a speed of 4 Mbps and stir4116 is a pin-compatible device, allows the manufacturer to create a USB high-speed adapter at different prices.

Stir4210/4220 and stir4116 are low-power USB2.0 USB2.0 USB2.0 IrDA bridge controllers, making the USB IrDA communication solution possible. stir4210/4220 and stir4116 can be directly connected to the USB bus and provide all functions between USB and IR transceiver. by adding an IR transceiver, a 24 MHz crystal and several passive components used for bypass and power filter can realize the usb ir communication subsystem.

Stir4210/4220 and stir4116 are compatible with IrDA serial infrared physical standard v1.4. stir4210 supports sleeping data rates to 4 Mbps (FIR), and stir4220 supports data rates up to 16 Mbps (vfir), including fir, Mir, and Sir. the Sir rate of stir4116 is as high as 115kbps. the stir4210 and stir4220 devices support all lower data rates developed by the IrDA standard (Sir and MIR.

Stir4210/4220 and stir4116 implement the USB high-speed device controller, including the integrated PHY transceiver, IR protocol controller, and programmable microcontroller.ProgramAnd buffer memory and Voltage Regulator Based on the USB infrared subsystem.

High-performance microcontroller provides control functions. in-chip program ROM and Program/Data Ram omit external components. ram is used as a data, buffer, and Rom patch ., the IR protocol controller supports IrDA encoding and decoding required for various data rates, enabling stir4210/4220 and stir4116 to provide interfaces with the highest performance and various equipment with IR functions. frame-less transmission supports proprietary applications. the gpio pin supports external function control. these pins include active LEDs and transceiver IDs. with these pins, the driver can detect the transceiver and configure performance parameters if needed. the integrated voltage regulator converts a USB 5.0 V power supply to the 1.8 V and 3.3 V power supplies required for the device and IrDA transceiver.

The core operating voltage of stir4210/4220 and stir4116 is 1.8 V, the I/O voltage is 3.3 V, and there is a 5.0 V INPUT tolerance. stir4210/4220 and stir4116 support Mac OS, Linux, winme, Win2000, Win XP, and later Windows OS.

From: HC