Motorola CPCI-6020 manual Serial Ports 3, SIM Model Numbers, Interface, 132

Transition Module Preparation and Installation Serial Ports 3 and 4

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.

7.4.2Serial 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 for more information. A special Y-adapter cable 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 Table 7-3 on page 142 for cable 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

Model Number

SIM232DCE6E

SIM232DTE6E

The next table provides port and connector assignments for the board and SIMs

Synchronous Port	Board Connector	SIM Connector	Jumper Header
Port 3	J11	J12	J17
Port 4	J1	J13	J16

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)