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P a g e 6
Product Description
PMC-4U-CACI is part of the PMC Module family of modular I/O components
by Dynamic Engineering. The PMC-4U is capable of providing multiple serial
protocols both synchronous and asynchronous with a wide range of baud
rates. The CACI interface uses an RS-423 driver, an RS-422 driver, and
an RS-422 receiver for each UART channel. Two enhanced hysteresis MIL
STD 188-114A receivers, a MIL STD 188-114A driver, and an open drain
active low output driver for one synchronous channel and an RS-422 driver
and receiver for the other synchronous channel.
Other variations are possible. Different oscillators can be installed, or
other modifications can be made to accommodate your particular
requirements. That variation will then be offered as a “standard” special
order product. Please see our web page for current products offered and
contact Dynamic Engineering with your custom application.
FIGURE 1 PMC-4U BLOCK DIAGRAM
+5V
Xilinx
XCS40XL
Quad
UART
XR16C854
SCC
Z85X30
2 channels
PCI Bus 33/32
Osc
Dip Switch
Osc
Osc
DATA
CONTROL
2
1V HYSTERISIS
± 5V
8
8
±12V, ±6V selectable
16
+5V
GND
switched
termination
RS232
RS423
RS188
RS485
RS422
2