PCIE 17V352 Dual RS422/RS485 Convertor Card

Overview

The XR17V352 (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 indepedent enhanced 16550 compatible UARTs. The V352 is compliant to PCIe 2.0 Gen 1 (2.5GT/s).

In addition to the UART channels, the V352 has 16 multi-purpose I/Os (MPIOs), a 16-bit general purpose counter/timer and a global interrupt status register to optimize interrupt servicing.

Each UART of the V352 has many enhanced features such as the 256-bytes TX and RX FIFOs, programmable Fractional Baud Rate Generator, Automatic Hardware or Software Flow Control, Auto RS-485 Half-Duplex Direction Control, programmable TX and RX FIFO Trigger Levels, TX and RX FIFO Level Counters, infrared mode, and data rates up to 25Mbps.

FEATURES

     • Single 3.3V power supply

     • Internal buck regulator for 1.2V core

     • PCIe 2.0 Gen 1 compliant

     • x1 Link, dual simplex, 2.5Gbps in each direction

     • Expansion bus interface

     • EEPROM interface for configuration

     • Data read/write burst operation

     • Global interrupt status register for all four UARTs

     • Up to 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