1 Product Description
The TPMC467 is a standard single-width 32 bit PMC module and offers 4 channels of high
performance RS232/RS422/RS485 programmable serial interface. The module offers front panel I/O
with four RJ45 type connectors. The TPMC467-10R provides a RJ45 I/O pinout according to EIA-
232D. The TPMC467-11R provides a non standard RJ45 I/O pinout (as used on Motorola CPU
boards).
The serial channels can be individually programmed to operate as RS232, RS422 or RS485 full
duplex/half duplex interface. In addition programmable termination is provided for the RS422/RS485
interfaces. After power-up all serial I/O lines are in a high impedance state.
Each RS232 channel supports RxD, TxD, RTS, CTS and GND. RS422 and RS485 full duplex support
a four wire interface (RX+, RX-, TX+, TX-) plus ground (GND). RS485 half duplex supports a two wire
interface (DX+, DX-) plus ground (GND).
Each channel has 64 byte transmit and receive FIFOs to significantly reduce the overhead required to
provide data to and get data from the transmitters and receivers. The FIFO trigger levels are
programmable and the baud rate is individually programmable up to 921.6 kbps for RS232 channels
and 5.5296 Mbps for RS422 channels. The UART offers readable FIFO levels.
All channels generate interrupts on PCI interrupt INTA. For fast interrupt source detection the UART
provides a special Global Interrupt Source Register.
All serial channels use ESD protected transceivers. ESD protection is up to ±15KV.
The TPMC467 can operate with 3.3V and 5.0V PCI I/O signaling voltage.
Figure 1-1 : Block Diagram
TPMC467 User Manual Issue 1.0.4
Page 6 of 30
