Application Information

The TPMC861 is a standard single-width 32 bit PMC

module with four channels of high performance

RS422/485-HD/FD asynchronous serial interface. Each of

the four channels is isolated from the system and against

each other by optocoupler and on board DC/DC converter

per channel.

The serial channels are accessible through a DB25

connector mounted in the front panel and via P14 I/O.

Each channel has a 128 byte transmit FIFO and a 128

byte receive FIFO to significantly reduce the overhead

required to provide data to and get data from the

transmitter and receivers. The FIFO trigger levels are

programmable. For RS422 and RS485-FD (Full-Duplex) a

four wire interface (RX+, RX-, TX+, TX-) plus isolated

ground (GND) per channel is supported. For RS485-HD

(Half-Duplex) a two wire interface (DX+, DX-) plus isolated

ground (GND) per channel is supported. The baud rate is

individually programmable up to 460.8 Kbaud for each

channel.

Interrupts are supported. All channels generate interrupts

on PCI interrupt INTA. For fast interrupt source detection

an interrupt status register that covers all four channels is

provided.

Each receiver input and transmitter output of all channels

is protected against electrostatic discharge (ESD) up to

+/- 15kV according to IEC 1000-4-2.

Software Support (TPMC861-SW-xx) is available for

several operating systems