Motorola MBX Series, Installation And Use Manual

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6-10 Computer Group Literature Center Web Site
Jumpers, Connectors, and LEDs
6
J8–J10 DRAM DIMM Size
The MBX series embedded controller provides either 4MB or 16MB of on-
board DRAM, soldered in place. In addition, it accommodates 8MB,
16MB, 32MB, 64MB, or 128MB of expansion DRAM in a 168-pin DIMM
socket, XU3.
Because the MBX supports I
2
C serial presence detect, the firmware
automatically detects the amount of memory installed in this socket. The
address width, however, is specified by jumper settings.
J8, J9, and J10 are configured as a set to match the size of the DRAM
module you have installed on the MBX. Set the jumpers as shown in the
following illustration to configure the MBX for the amount of expansion
DRAM in socket XU3.
J11 DREQ# Signal Source for DMA-type PCMCIA Cards
A single-slot PCMCIA interface (socket XJ26) and controller are available
on the MBX series embedded controller. The interface is configurable for
DMA or non-DMA PCMCIA cards; that is, the routing of the INPACK#
signal (needed for only some cards with DMA capability) can be defined.
2152 9805 (i)
J8
8MB
(factory
configuration)
J9 J10
1 2 3 1 2 3 1 2 3
1 2 3 1 2 3 1 2 3
1 2 3 1 2 3 1 2 3
1 2 3 1 2 3 1 2 3
16MB
32MB
64MB/
128MB