XR20M1170
XR20M1170 is I2C/SPI UART manufactured by Exar.
DESCRIPTION
The XR20M11701 (M1170) is a high performance universal asynchronous receiver and transmitter (UART) with 64 byte TX and RX FIFOs and a selectable I2C/SPI slave interface. The M1170 operates from 1.62 to 3.63 volts. The enhanced features in the M1170 include a programmable fractional baud rate generator, an 8X and 4X sampling rate that allows for a maximum baud rate of 16 Mbps at 3.3V. 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. The M1170 is available in the 28-pin QFN, 24-pin QFN, 16-pin QFN, 24-pin TSSOP and 16-pin TSSOP packages. The 28-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
FEATURES
- 1.62 to 3.6 Volt Operation
- Selectable I2C/SPI Interface
- Full-featured UART
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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 Control Output via RTS# Direction
- Wireless Infrared (Ir DA 1.0 and 1.1) Encoder/ Decoder Automatic sleep mode (< 15 u A at 3.3V) General Purpose I/Os Full modem interface
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- APPLICATIONS
- Portable Appliances
- Battery-Operated Devices
- Cellular Data Devices
- Factory Automation and Process Controls
FIGURE 1. XR20M1170 BLOCK DIAGRAM
- Crystal oscillator (up to 24MHz) or external clock
(up to 64MHz) input
- 28-QFN, 24-QFN, 16-QFN, 24-TSSOP, 16-TSSOP packages
VCC ENIR# EN485# IRQ# SDA SCL A0/CS# A1/SI SO...
