Motorola MVME187 User Manual
Preparing the Hardware
3-11
3
Optional SRAM Backup Power Source Select Header J6
Header J6 is an optional header used to select the SRAM backup
power source on the MVME187, if the optional battery is present.
(The battery backup for SRAM is optionally available, but only as a
factory build and only by special request.)
power source on the MVME187, if the optional battery is present.
(The battery backup for SRAM is optionally available, but only as a
factory build and only by special request.)
!
Caution
If your system is equipped with the optional battery
backup, do not remove the jumpers from J6. This will
disable the SRAM. If your board contains optional
header J6, but the optional battery is removed, jumpers
must be installed between pins 1 and 3 and pins 2 and 4
for the factory configuration as shown in
backup, do not remove the jumpers from J6. This will
disable the SRAM. If your board contains optional
header J6, but the optional battery is removed, jumpers
must be installed between pins 1 and 3 and pins 2 and 4
for the factory configuration as shown in
Serial Port 4 Clock Configuration Select Headers J7 and J8
Serial port 4 can be configured to use clock signals provided by the
TRXC4 and RTXC4 signal lines.
TRXC4 and RTXC4 signal lines.
Headers J7 and J8 on the MVME187 configure serial port 4 to drive
or receive TRXC4 and RTXC4, respectively (see
or receive TRXC4 and RTXC4, respectively (see
❏
Factory configuration sets port 4 to receive both signals.
❏
The alternative configuration sets port 4 to drive both signals
The remaining configuration of the clock lines is accomplished
using the Serial Port 4 Clock Configuration Select header on the
MVME712M transition module. Refer to the MVME712M
Transition Module and P2 Adapter Board User's Manual for
configuration of that header.
using the Serial Port 4 Clock Configuration Select header on the
MVME712M transition module. Refer to the MVME712M
Transition Module and P2 Adapter Board User's Manual for
configuration of that header.