Datasheet

WVGA/LCD EI3 Extender Board Manual 1-7
Using WVGA/LCD EI3 Extender Board
Expansion Interface III
The Expansion Interface III (EI3) allows an extender board to be used
across various hardware platforms that have the same expansion interface
connectors.
The EI3 implemented on the WVGA/LCD EI3 Extender Board contains
the PPI, SPI, TWI and GPIO ports. These signals are used for the periph-
erals on the extender. Signals that are not used on the extender are passed
through to two connectors on the bottom side of the board (P1 and P2)
and can be used for stacking another EI3 extender board. The connectors
contain a majority of the processor’s signals. For pinout information, go
to “WVGA/LCD EI3 Extender Board Schematic” on page B-1. The
mechanical dimensions of the expansion connectors can be obtained by
contacting “Technical Support”.
For more information about extender boards, visit the Analog Devices
Web site (www.analog.com).
Limits to current and interface speed must be taken into consideration
when using the EI3. Current for the EI3 can be sourced from the EZ-KIT
Lite/EZ-Board; therefore, the current should be limited to 200 mA for 5V
and 300 mA for the 3.3V planes. If more current is required, then a sepa-
rate power connector and a regulator must be designed on the daughter
card. Additional circuitry can add extra loading to signals, decreasing their
maximum effective speed.

Analog Devices does not support and is not responsible for the
effects of additional circuitry.
Example Programs
Example programs are included with the WVGA/LCD EI3 Extender
Board BSP. Example programs demonstrate various capabilities of the
product. The support package is installed on top of CrossCore Embedded