Motorola MVME2603-1121A Installation And Use Manual page 29

Serial Port 3 Transmit Clock Configuration (J18)
In synchronous serial communications using the MVME761
transition module, you can configure Serial Port 3 on the
MVME2603/2604 to use the clock signals provided by the TxC
signal line. On MVME761-compatible versions of the base board,
header J18 configures port 3 to either drive or receive TxC. The
factory configuration has port 3 set to receive TxC. J18 remains open
on MVME712M-compatible versions.
To complete the configuration of Serial Port 3, you must set J2 on
the MVME761 transition module (Serial Port 3 clock configuration)
as well.
Figures 1-6/1-7 (for the MVME712M) and Figures 1-14/1-15 (for
the MVME761) diagram the overall jumper settings required on the
MVME2603/2604 and transition module for a Serial Port 3 DCE or
DTE configuration.
For additional details on the configuration of the MVME761
headers, refer to the MVME761 Transition Module section or to the
userÕs manual for the module (listed in the Related Documentation
appendix).
J18
3
2
1
Drive TxC
Hardware Preparation and Installation
J18
3
2
1
Receive TxC
(factory configuration)
1
1-13