JSimm
Technical Data

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JSimm is an open expansion system for
Systronix embedded Java and SimmStick systems

The functions of JSimm pins depend a bit on the host processor. JStamp defines the base functionality and JStik adds to that.

JSimm Signals
JSimm signals In general, JSimm bus signals are TTL level, and can be used with either 3.3V or 5V logic. I/O pins assume at least 8 mA sink or source current.
JSimm JStik pinout table (PDF) JStik has more I/O pins, and it "doubles up" some of them to provide more I/O options. See the JStik technical reference for all the details. Here is a table describing JStik-JSimm connections. It's extracted from the JStik quick reference.
JStamp Development station pinout table (PDF) JStamp itself does not have a JSimm interface, but the JStamp development Station does. Here is its pinout, as well as the JStamp pins and the development station's 25x2 I/O header. This table is extracted from the JStamp dev station quick reference.
JSimm pinout schematic (100KByte PDF).  
JStik power connections with JSimm and Simmstick bus 10 KBytes The Simmstick bus did not contemplate 3.3V power, but JSimm does. Here is an explanation of the various power input and output options when using JStik and JSimm/Simmstick together.
 
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