Motorola CPCI-6020 ユーザーズマニュアル

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.

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.

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.

1

3

J17 DCE

1

3

J17 DTE

1

3

J16 DTE

1

3

J16 DCE