The memory plug is a small board with 1 to 4 EEPROM memory chips. With M24M01’s from STMicroelectronics, for example, the board can have up to 512 Kbyte of memory (4x 1 Mbit).
An I2C bus running at 3.3V is used for I/O, with all the power and signal lines brought out to to both sides of the board to allow daisy-chaining with other I2C-conformant boards.
For additional details, see http://jeelabs.org/2009/09/19/memory-plug-v1/
There is nothing to configure. The memory chips on this plug respond to I2C addresses 0x50 .. 0x57 (each chip responds to two consecutive addresses!).
Dimensions: 21.1 x 24.1 mm
CadSoft EAGLE design files: see below.
This plug can be operated at 5V as well as 3.3V.
This board uses the conventions of a JeePlug and can be used with the ports on a JeeNode. It can also be used with other boards and MCU’s, if you hook it up properly and adapt the interface code for it.