Sealevel 7203e PCI Express 2-Port Isolated Serial Interface

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Produktnummer: 7203e

The 7203e PCI Express serial interface provides two optically isolated serial ports, each individually configurable for RS-232, RS-422, or RS-485. Each serial port utilizes a 16C952 UART with 128-byte Tx/Rx FIFOs that enables data rates to 460.8K bps for reliable high-speed communications in data intensive applications. This high-performance UART includes 9-bit framing support and is register compatible with legacy 16550 software applications. In addition, the board derives a 62.5 MHz clock from the PCI Express link. This ultra-high speed clock is divided by a flexible 8-bit clock prescalar with 1/8 steps to provide support for the widest range of standard and non-standard baud rates.

Each port individually configurable for RS-232, RS-422, or RS-485
Optical isolation provides protection against transients and ground loops
16C952 buffered UARTs with 128-byte FIFOs
Oscillator and clock prescalar support wide range of baud rates
Supports 9-bit protocol framing
Each port supports data rates to 460.8K bps
RS-485 line termination, pull-up and pull-down resistors for each port are selectable via dipswitch
RS-485 ECHO can be enabled/disabled via dipswitch
PCI Express X1 compliant
Compatible with all standard size PCI Express slots
All modem control signals implemented in RS-232 mode
Automatic RS-485 enable/disable in hardware
Board includes two DB9M connectors