PCIE 17V352 Dual RS422/RS485 Convertor Card

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).


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.


     • 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


       • Communication controller: 16C550 UART Compatible register Set

• Bus: PCIe 2.0 Gen 1 compliant , X1 Link, dual simplex, 2.5Gbps in each direction

• Connector: DB44 Female

Serial Interface

• Number of ports: 2 ports

• Serial Standard: RS-422 (Point to Point mode), RS-485 (2 Wire RS-485 mode), 4 Wire RS-485 (Multi-Drop RS-422 mode)

• IRQ and I/O Address: Assigned by System

Serial Line Protection

• ESD Protection: 15KV ESD Protection for all signals

• Surge Protection: 600W Surge Protection for RS-422/485 signals


• Baud rate: up to 921.6 Kbps

• FIFOs: 256 byte

Serial Communication Parameters

• Data Bits: 5, 6, 7, 8

• Stop Bits: 1, 1.5, 2

• Parity: None, Even, Odd, Space, Mark

Serial Signals

• RS-422: TxD+, TxD- RxD+, RxD-, GND

• 2 Wire RS-485: Data+, Data-, GND

• 4 Wire RS-485: TxD+, TxD-, RxD+, RxD-, GND

System Requirements

Windows Server 2003, 2008, 2012, Windows XP, Vista, Win 7, Win 8

Linux 2.6.27, 2.6.31, 2.6.32, 3.x.x and newer

PCI Express-enabled system with an available PCI Express slot


Physical Characteristics

Bracket: Standard and Low Profile Bracket

Bracket Space: 1

Operating Temperature:-40 ~ 85°C

1 x PCIE 17V352 RS485/422 Serial Card (1 to 4 Port Cable Included)

1 x CD Driver

1 x User Manual

1 x Low Profile Bracket

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