Overview
1. Overview
Figure 1:
Block circuit diagram
The CPCI-COM4 is a CompactPCI board in 3U format. It features 4 serial interfaces (RS-232, RS-
422 or RS-485). On request the board can be updated to up to 12 RS-232 or 8 RS-422/RS-485
interfaces (without handshake) via software update.
Local data control and management is controlled by an FPGA.
On request the CPCI-COM4 optionally features an IRIG-B interface and high resolution hardware
timestamps.
All I/Os are connected to a 37-pin DSUB connector in the front panel.
The HDLC protocol is supported on the 4 serial interfaces as input or output.
Clock generation or -reception is configurable for each interface.
Fast adaption to customer-specific protocols and physical layers can easily be realised due to
modular design: The protocol is implemented in the FPGA.
Physical layer connectors are located on a Piggy-back for easy design modifications.
A Software driver is available for QNX. Software drivers for VxWorks or Windows are available on
request.
Page 6 of 17
Hardware Manual • Doc. No.: I.2328.21 / Rev. 1.0
CPCI-COM4
Krypto
Chip
4 x
Serial
Core
1x IRIG-B
FPGA
Xilinx
Spartan-3E
IRQ A
PCI Bridge
PLX PCI9056
C
om
pa
ct
C
I C
on
n
ec
to
r
RAM
(Option)
Rear-IO
4x
Serial
and
optional
IRIG-B
Electrical Isolation
DSUB37
IRIG-B Input
CompactPCI
Front Panel
6 LEDs
A/D
Converter
Physical
IRIG-B Layer
RS-422
compatible
Physical
IRIG-B Layer
analog
IRIG-B
IRIG-B
C
on
n
ec
to
r
RTC
Option
IRIG-B
8-Bit
Microcontroller
(8051)
4 Serial Interfaces
RS-232/
RS-422/
RS-485
4x Serial Interface
optional FPGA-IO
RS-485 Interface including
all Handshaking Signals
HDLC/RS-422 Interface
including Clock Siganls
RS-232 Interface including
all Handshaking Siganls
8
