14 afb mezzanine, Afb mezzanine – Kontron SMARC Evaluation Carrier User Manual
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User’s Guide
55
14 AFB Mezzanine
The AFB (“Alternative Function Block”) is a set of pins in the SMARC Module specification that are set aside for
various alternative functions that are project and design specific. Some of the possibilities include but are not limited
to a MOST Media Local Bus interface; a 2
nd
GBE interface, or a Fieldbus interface.
The connector used is a Samtec part designed for high speed differential pair use. The selected part allows for up to 20
differential pairs. The parts used are shown in the flowing table.
Vendor
Vendor P/N
Connector type
Kontron PN
Samtec
QSH-020-01-L-D-DP-A
SMARC Evaluation Carrier
1052-2542
Samtec
QTH-020-01-L-D-DP-A
AFB Mezzanine
There is also a cabled version of the Samtec connector that will mate with the part used on the Evaluation Carrier for
AFB use.
The AFB Mezzanine is a 50mm x 36mm card, as shown in the figure on the following page. The board – to – board
spacing is 5mm. Standoffs with M2.5 threads are present on the Evaluation Carrier.
There are no parts in the shadow of the AFB Mezzanine (except for 4 standoffs and the Samtec connector) on the
Evaluation Carrier. A bottom side maximum component height of 3mm is recommended. On the AFB top side, tall parts
such as a GBE Mag-Jack may be used.