TQMC401

QMC module with 4-port high-speed synchronous/asynchronous serial interface

The QMC module offers 4 high-speed synchronous/asynchronous serial interfaces. The serial communication controller of the TQMC401 is implemented in FPGA logic along with the bus master capable PCIe interface, guaranteeing long term availability and having the option to implement additional functions in the future. Data transfer to and from host memory is handled via TQMC401 initiated DMA cycles for minimum host/CPU intervention.

Each channel has a receive and transmit FIFO of 512 long words (32 bit) per channel for high data throughput. Several serial communication protocols are supported for each channel, such as asynchronous (with oversampling), isochronous, synchronous and HDLC mode. Available signal encodings for synchronous data communication are NRZ, NRZI, FM0, FM1 and Manchester. Available clock sources are 14.7456 MHz for standard asynchronous baud rates, 10 MHz for the 10 Mbit/s synchronous data rate and 24 MHz for other baud or data rates. Each channel provides various interrupt sources which can be enabled or disabled individually. The Differential I/O lines for EIA-422, EIA-485 Full-Duplex are terminated with 120Ω onboard.

A wide range of drivers is available: Linux, LynxOS, Integrity, QNX, VxWorks and Windows. All drivers - except the Windows drivers - are supplied as C source code.