GENERAL DESCRIPTION
   The XR17V3521 (V352) is a single chip 2-channel PCI Express (PCIe) UART (Universal Asynchronous Receiver and Transmitter), optimized for higher performance and lower power. The V352 serves as a single lane PCIe bridge to 2 independent enhanced 16550 compatible UARTs. The V352 is compliant to PCIe 2.0 Gen 1 (2.5 GT/s).

FEATURES
● Single 3.3V power supply
● Internal buck regulator for 1.2V core
● PCIe 2.0 Gen 1 compliant
● x1 Link, dual simplex, 2.5 Gbps in each direction
● EEPROM interface for configuration
● Data read/write 32-bit operation
● Global interrupt status register for both UARTs
● Up to 31.25 Mbps serial data rate
● 16 multi-purpose inputs/outputs (MPIOs)
● 16-bit general purpose timer/counter
● Sleep mode with wake-up Indicator
● Two independent UART channels controlled with
   ■ 16550 compatible register Set
   ■ 256-byte TX and RX FIFOs
   ■ Programmable TX and RX Trigger Levels
   ■ TX/RX FIFO Level Counters
   ■ Fractional baud rate generator
   ■ Automatic RTS/CTS or DTR/DSR hardware
      flow control with programmable hysteresis
   ■ Automatic Xon/Xoff software flow control
   ■ RS-485 half duplex direction control output
      with programmable turn-around delay
   ■ Multi-drop with Auto Address Detection
   ■ Infrared (IrDA 1.1) data encoder/decoder
● Software compatible to XR17C15x, XR17D15x,
   XR17V25x PCI UARTs

APPLICATIONS
● Next generation Point-of-Sale Systems
● Remote Access Servers
● Storage Network Management
● Factory Automation and Process Control
● Multi-port RS-232/RS-422/RS-485 Cards