Specifications

158004.B00 B1
APPENDIX B: TP400 SET-UP PROCEDURE.
This appendix describes fitting SDRAM to the TP400, and solder link settings.
The component placement diagrams in Appendix C may be of help in locating the
solder links referred to in this appendix.
A number of functions can be configured with solder links on the TP400 board. The
board layout is so dense we have implemented these configuration options with
solder links that take less space than jumpers, as well as being more reliable.
Care must be taken when changing these link areas so that no accidental shorts are
produced. Default settings are noted below.
B.1 PROCESSOR COOLING
The TP400 dissipates up to 5W, most of which is generated in the processor. Some
cooling should be provided, or the processor may overheat. DSP Design can provide
a passive heatsink and a heatsink/fan combination, which may be useful. Ultimately
cooling is a system design issue, and must remain the responsibility of the system
design engineer.
B.2 SDRAM CONFIGURATION
The TP400 uses 144-pin SODIMM SDRAM modules for memory. The standard
TP400 product is delivered as standard with no SDRAM modules fitted. Users may
buy SODIMM modules from DSP Design or fit their own. DSP Design carry stock of
the SODIMM modules. These modules have been selected to operate correctly with
the TP400.
SDRAM should be PC100 compliant. Table B1 lists the DSP Design part numbers for
various memory sizes.
SDRAM SIZE DSP DESIGN PART
32M Bytes SD32
64M Bytes SD64
128M Bytes SD128
256M bytes SD256
TABLE B1 - SODIMM MODULES
Install your SDRAM SODIMM module in the TP400 SDRAM socket, observing its
polarity, and observing proper anti-static precautions. The SODIMM socket has a lug
that engages with a cut-out on the module, which prevents incorrect installation.