Serial Port 4 Transmit Clock Configuration (J17); Serial Port 4 Transmit Clock Receiver Buffer Control (J19) - Motorola MVME2700 Series Installation And Use Manual

Serial port configurations for the MVME712M are illustrated in figures
1-5 through 1-10.
Serial port configurations for the MVME761 are illustrated in figures
through 1-29.

Serial Port 4 Transmit Clock Configuration (J17)

In synchronous serial communications, you can configure serial port 4 on
the MVME2700 to use the clock signals provided by the TxC signal line.
Header J17 configures port 4 to either drive or receive TxC (default). The
factory configuration has port 4 set to receive TxC.
A complete configuration of serial port 4 requires that you set additional
jumper headers on the MVME2700 or the transition module.
Serial port configurations for the MVME712M are illustrated in figures
1-5 through 1-10.
Serial port configurations for the MVME761 are illustrated in figures
through 1-29.

Serial Port 4 Transmit Clock Receiver Buffer Control (J19)

A transmit clock receiver buffer (controlled by header J19) is associated
with serial port 4. Installing a jumper on J19 enables the buffer. Removing
the jumper disables the buffer. The factory configuration has the serial port
4 buffer enabled.
http://www.motorola.com/computer/literature
J17
3
2
1
Drive TxC
MVME2700 Base Board Preparation
J17
3
2
1
Receive TxC
(factory configuration)
1
1-12
1-12
1-9