Serial Interface Module Circuitry; Figure 7-4 Ports 3 And 4 Header Settings - Motorola CPCI-6020 Installation And Use Manual

Serial Interface Module Circuitry

Headers J17 and J16 are used to configure serial ports 3 and 4 respectively, in tandem with the
proper SIM selection. With a jumper across pins 1 and 2 on either header, the port is configured
as DTE. With a jumper across pins 2 and 3, the port is configured as DCE. It is important to
note that the jumper setting of the port must match the configuration of the corresponding SIM
module.
Figure 7-4 Ports 3 and 4 Header Settings
When installing the SIM modules, note that the headers are keyed for proper orientation. For
further information on the preparation and installation of the transition module, refer to the
following sections.
The next figures illustrate the CPCI-6020 baseboard and CPCI-6020-MCPTM-01 transition
module with the interconnections and jumper settings for DCE/DTE configuration on each serial
port.
7.4.3 Serial Interface Module Circuitry
Each Serial Interface Module (SIM) has a 60-pin connector that provides all signal and power
connections to the CPCI-6020-MCPTM-01 transition module.
All TTL-level signals, with the exception of data and clocks, are active low. The pull-up resistors
on the CPCI-6020-MCPTM-01 transition module drive all TTL inputs to the SIM to a known logic
level.
The SIMs have surge suppression circuitry for all port signals going to the external connector.
This consists of a series resistor and a dual 15 V clamp diode to chassis ground. All series
resistors are 100 ohms.
CPCI-6020 CompactPCI Single Board Computer Installation and Use (6806800A51C)
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Transition Module Preparation and Installation
1
1
3
3
J16 DTE
J16 DCE
1 1
3 3
J17 DCE
J17 DTE
133