LayGO PXS-USB Installation Guide

The LayGO PXS-USB (PXSu) is a USB-to-Synchronous communication adapter. From a user's point of view, it behaves like any of our other synchronous communication cards. It is 100% compatible with the LayGO API, so applications written to the API will run unmodified using this device. The LayGO PXSu is compatible with the USB 2.0 standard and operates at full speed (12 Mbps).

Hardware

ARM Cortex-M3 based microcontroller (STMicroelectronics STM32F103) with:
- 512KB Flash memory
- 64KB SRAM
- USB Macrocell
Altera Cyclone III FPGA
Software selectable interface type:
- RS-232
- RS-422
- RS-449
- RS-485
- EIA-530
- V.35

Firmware

Custom 1 line HDLC controller capable of speeds up to 4 Mbps.
USB to HDLC data transfer and control program.
Device Firmware Update (DFU) allowing field update to the firmware and the netlist for the FPGA.

Software

Windows XP/Vista/2K3/2K8 USB device driver.
LayGO API.

Cables

The PXSu looks like a cable with a USB connector on one side and a DB-25 connector in the other. All of the electronics are housed inside the DB-25 connector case.
Most LayGO applications replace a modem. For this reason, the DB-25 connector in the PXS can be ordered with a female DB-25 connector wired as a DCE. In this configuration, a DTE cable can be connected directly to the PXSu without a "null modem" adapter. See Cable - Female for detailed pin assignments.

Introduction

Hardware

Firmware

Software

Cables