XR20M1172 Datasheet | MaxLinear

DESCRIPTION The XR20M11721 is a high performance two channel universal asynchronous receiver and transmitter (UART) with 64 byte TX and RX FIFOs and a selectable I2C/SPI slave interface. The XR20M1172 operates from 1.62 to 3.63 volts. The standard features include 16 selectable TX and RX FIFO trigger levels, automatic hardware (RTS/CTS) and software (Xon/Xoff) flow control, and a plete modem interface. Onboard registers provide the user with operational status and data error flags. An internal loopback capability allows system diagnostics. Additional enhanced features includes a programmable fractional baud rate generator and 8X and 4X sampling rate that allows for a maximum baud rate of 16 Mbps at 3.3V. The XR20M1172 is available in the 32-pin QFN and 28-pin TSSOP packages. The 32-pin QFN package has the EN485# and ENIR# pins to allow the UART to power-up in the Auto RS485 mode or the Infrared mode. NOTE: 1 Covered by U.S. Patent #5,649,122 APPLICATIONS - Portable Appliances - Battery-Operated Devices - Cellular Data Devices - Factory Automation and Process Controls FEATURES - 1.62 to 3.6 Volt Operation - Selectable I2C/SPI Interface - SPI clock frequency up to - 18 MHz at 3.3 V - 16 MHz at 2.5 V - 8 MHz at 1.8 V - Full-featured UART - Data rate of up to 16 Mbps at 3.3 V - Data rate of up to 12.5 Mbps at 2.5 V - Data rate of up to 8 Mbps at 1.8 V - Fractional Baud Rate Generator - Transmit and Receive FIFOs of 64 bytes - 16 Selectable TX and RX FIFO Trigger Levels - Automatic Hardware (RTS/CTS) Flow Control - Automatic Software (Xon/Xoff) Flow Control - Halt and Resume Transmission Control - Automatic RS-485 Half-duplex Direction Control Output via RTS# - Wireless Infrared (Ir DA 1.0 and 1.1) Encoder/ Decoder - Automatic sleep mode (< 30 u A at 3.3V) - General Purpose I/Os - Full modem interface - Crystal oscillator (up to 24MHz) or external clock (up to 64MHz) input - 32-QFN and 28-TSSOP packages FIGURE 1. XR20M1172 BLOCK DIAGRAM E N IR # EN 485# IR Q #...