verdex

The gumstix verdex motherboard is based on the Marvel PXA 270 wtih XScale processor. USB devices can be attached using a console-vx, consoleLCD-vx or consoleLCD16-vx expansion board. The consoleLCD-vx and consoleLCD16-vx expansion boards also directly connect an LCD panel.

Each verdex motherboard has a 60-pin connector, a 120-pin connector and a 24-pin connector. Gumstix sells a range of 60-pin and 120-pin expansion boards. One 60-pin expansion board can be connected to the 60-pin connector and one 120-pin expansion board can be connected to the 120-pin connector on the opposite side of the verdex motherboard .

Each verdex motherboard provides USB 1.1 and full speed - which is 12 Mbps on both the device and the host.. 12MBps is considered in the industry to be "USB Full Speed".

Specifications on the verdex motherboard may be found here .

basix and connex

The PXA 255-based basix and connex motherboards offer a wide range of function and connectivity in a very small form factor.

Specifications on the connex motherboards may be found here while specifications for the basix motherboards are posted here .

Motherboard I/O

To assist development of solutions that interface to a gumstix motherboard, I/O information is published 24/7 by the company.

We are currently in the process of moving and updating content from the wiki. In the meantime you can find this information at:

http://docwiki.gumstix.org/Gumstix_motherboard_I/O

Motherboard connector part numbers

Motherboard Connectors

1/ Part numbers for the 120-pin connector

- The 120 pin connector that goes on the gumstix verdex motherboard is the part #55686-1274 from Molex.

- the mating connector from Molex is part #54876-1274 (discontinued)

- The new mating connector from Molex is part # 0546841204


2/ Part numbers for the 24-pin flex connector

FH12A-24S-0.5SH(55) Digikey part HFK124CT-ND

The 24-pin flex connector was added to the verdex motherboard in response to customer demands for a daughtercard on the 120-pin side of the motherboard that provides UART, USB host etc function on the 24pin/120pin side of the verdex motherboard as these functions are normally "60-pin" type functions.

With a flat flex cable, it is possible to bring those functions from the 24-pin flex connector on to a custom board on the120-pin side of the verdex motherboard in order to reduce the thickness of the multi-board "sandwich".

Additionally, for very simple gumstix implementation scenarios, (e.g. connecting say an I2C sensor to a gumstix), the 24-pin flex connector is lower cost & easier to integrate than the 60- or 120-pin connectors.


The 24-pin flex connector on the verdex motherboard addresses several issues:

1) being able to get a console while the motherboard is otherwise in use without the physical limitations of the tweener.

2) USB Host.

3) Battery for RTC.

4) Daughtercards that need a flex connector.

Digikey sells a connector and cable that fits the 24 pin connector:
flex connector - HFK124CT-ND
flex cable - HFF-24U-03-ND

3/ Part numbers for the 60-pin connector:

Hirose DF12D(3.0)60DP0.5V80.

The 60-pin connector has 0.5mm pitch and an interboard distance of 3mm. So, working with the 60-pin connector requires using surface mount pads and techniques.

 

 

Motherboard data sheets

Datasheets have been posted for the gumstx motherboards here:

 http://pubs.gumstix.com/documents/PXA%20Documentation/

Motherboard Selector Tool

The gumstix motherboard selector tool may be found here.