Template:FAQ/Questions/expansion boards can be

Which expansion boards can be connected to the gumstix motherboards?
To expand function in the gumstix product line, our engineering team has designed the gumstix motherboards with connectors on one or both sides as follows:

basix motherboard

Only one 60-pin expansion board may be connected to the basix motherboard via the 60-pin hirose connector.

connex motherboard

Two expansion boards may be connected to the connex motherboard: one expansion board on either side forming up to a three board sandwich.

Only one 60-pin expansion board may be connected via the 60-pin hirose connector while, on the other side of the connex, only one 92-pin expansion board may be connected via the 92-pin bus header.

verdex motherboard

Two currently available expansion boards may be connected to the verdex motherboard: one expansion board on each side forming up to a three board sandwich.

Only one 60-pin expansion board may be connected via the 60-pin hirose connector while, on the other side of the verdex motherboard, only one 120-pin expansion board may be connected via the 120-pin bus header.

The one exception to the statements above is the tweener board which can connect between the 60-pin expansion board and any of the three motherboards on the 60-pin hirose connector side.

Notes:

1. Connecting the tweener with the robostix board requires this tweener modifications.

2. The tweener must be connected in the direction that makes it face outside the connex board configuration in order to function properly.

This picture may help explain the tweener setup better:

The tweener board can work with all 60-pin expansion expansion boards EXCEPT the breakout-SMT, the breakout-TH or the thumbstix. These three boards have physical limitations that prevent the connection to the tweener board.

.