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XR20M1280 Dataheets PDF



Part Number XR20M1280
Manufacturers Exar
Logo Exar
Description I2C/SPI UART
Datasheet XR20M1280 DatasheetXR20M1280 Datasheet (PDF)

XR20M1280 I2C/SPI UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS MAY 2011 REV. 1.0.0 GENERAL DESCRIPTION The XR20M12801 (M1280) is a single-channel I2C/ SPI Universal Asynchronous Receiver and Transmitter (UART) with integrated level shifters and 128 bytes of transmit and receive FIFOs. For flexibility in a mixed voltage environment, the M1280 has 4 VCC pins. There is a VCC pin for the core, a VCC pin for the UART signals, a VCC pin for the CPU interface signals and a VCC pin for the G.

  XR20M1280   XR20M1280



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XR20M1280 I2C/SPI UART WITH 128-BYTE FIFO AND INTEGRATED LEVEL SHIFTERS MAY 2011 REV. 1.0.0 GENERAL DESCRIPTION The XR20M12801 (M1280) is a single-channel I2C/ SPI Universal Asynchronous Receiver and Transmitter (UART) with integrated level shifters and 128 bytes of transmit and receive FIFOs. For flexibility in a mixed voltage environment, the M1280 has 4 VCC pins. There is a VCC pin for the core, a VCC pin for the UART signals, a VCC pin for the CPU interface signals and a VCC pin for the GPIO signals. The VCC pins for the UART, GPIO and I2C/SPI interface signals allow for the M1280 to interface with devices operating at different voltage levels eliminating the need for external voltage level shifters. The VCC pin for the core voltage helps lower the overall power consumption of applications that use slower data rates. The Auto RS-485 Half-Duplex Direction control feature simplifies both the hardware and software for half-duplex RS-485 applications. In addition, the Multidrop mode.


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