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Transition Module Preparation and Installation
These asynchronous serial ports (COM1 and COM2) are configured permanently as data
circuit-terminating equipment (DTE). A terminal for COM1 may be connected to either the
processor board or the transition module, but not both.
7.4.2
Serial Ports 3 and 4
The two synchronous serial ports, COM3 and COM4, are implemented with the Z85230 ESCC
on the CPCI-6020. Since the Z85230 does not have all of the necessary modem lines, a Z8536
CIO is used to provide the missing modem lines. All modem control lines from the ESCC are
multiplexed/demultiplexed through J3 by the P2MX function due to I/O pin limitations. Refer to
I/O Signal Multiplexing (IOMUX) on page 101
is required for separating the signals from a 50-pin connector on the rear of the transition
module to two 26-pin connectors for COM3 and COM4. Refer to
description and part number.
The synchronous serial ports (Serial Ports 3 and 4) are configured through a combination of
serial interface module (SIM) selection and jumper settings. A SIM is a small "plug-in" printed
circuit board that converts the TTL-level synchronous or asynchronous port signals to industry
standard voltage levels used by the ports. The SIM contains the receiver and transmitter circuits
for converting the input and output signals of the host CPCI-6020 to the appropriate serial data
communication protocol. The table below lists the SIM connectors and jumper headers
corresponding to each of the synchronous serial ports.
Both Serial Port 3 and 4 are routed through connector J1.
Table 7-1 SIM Model Numbers
Interface
EIA-232-D DCE
EIA-232-D DTE
The next table provides port and connector assignments for the board and SIMs
Synchronous Port
Port 3
Port 4
1. Requires Motorola's specially designed Y-adapter cable (30-W2046F02A) or similar customer designed adapter.
Refer to the pin assignment information following this section for connectors J1, J12 and J13,
as well as other connectors.
132
CPCI-6020 CompactPCI Single Board Computer Installation and Use (6806800A51C)
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
for more information. A special Y-adapter cable
Model Number
SIM232DCE6E
SIM232DTE6E
Board Connector
SIM Connector
1
J1
J12
J1
J13
Serial Ports 3 and 4
Table 7-3 on page 142
for cable
Jumper Header
J17
J16
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