The connectors provide support for following interfaces.
- Control and status signals
- Multiplexed I/O (MIO) bank
- PS-GTR high-speed serial transceiver signals
- High-performance I/O (HPIO) bank signals
- High-density I/O (HDIO) bank signals
- GTH high-speed serial transceiver signals (K26 only)
- Power system
K26 SOM
The K26 SOM uses two 240-pin connectors to provide electrical connectivity between the SOM and the carrier card. These two connectors are referred to as SOM240_1 and SOM240_2. The SOM SOM240_1 and SOM240_2 connector pinouts are available in the Electrical Specifications section of the Kria K26 SOM Data Sheet (DS987).
The SOM240_1 and SOM240_2 connectors use the Samtec 0.635 mm AcceleRate HD high-density 4-row, 60 position connector set. The part number for the socket (ADF6–60–03.5–L–4–2–A) is used on the bottom side of the SOM. The part number for the terminal (ADM6–60–01.5–L–4–2–A) is for use on the carrier card.
K24 SOM
The K24 SOM uses one 240-pin connector and one 40-pin connector to provide electrical connectivity between the SOM and the carrier card. These two connectors are referred to as SOM240_1 and SOM40. The SOM240_1 connector is backward compatible with the SOM240_1 connector on the K26 SOM. The SOM SOM240_1 and SOM40 connector pinouts are available in the Electrical Specifications section of the Kria K24 SOM Data Sheet (DS985).
The SOM240_1 connector uses the Samtec 0.635 mm AcceleRate (R) HD high-density 4-row, 60 position connector set. The part number for the socket (ADF6–60–03.5–L–4–2–A) is used on the bottom side of the SOM. The part number for the terminal (ADM6–60–01.5–L–4–2–A) is for use on the carrier card. The SOM40 connector uses the Samtec 0.635 mm AcceleRate (R) HD high-density 4-row, 10 position connector set. The part number for the socket (ADF6–10–03.5–L–4–2–A) is used on the bottom side of the SOM. The part number for the terminal (ADM6–10–01.5–L–4–2–A) is for use on the carrier card.
Scalability Across Kria SOMs
Kria SOMs are designed to support user scalability between the both the K26 and K24 SOMs. This is achieved by having a shared physical connector and corresponding electrical pinout for a common set of physical I/O, power rails, and interface capabilities on the SOM240_1 connector. The scalability between the additional I/O of K26 vs. K24 is accomplished through the secondary connectors SOM40 on K24 and SOM240_2 on K26. A given carrier card can accommodate both K24 and K26 by using the mechanical keep outs and connector alignments outlined in the following image and by planning for their extended I/O to be mapped to the extended I/O connectors of the corresponding SOM.
- som_240_1
- Common connector to both K26
and K24
- Control and status signals
- MIO signals
- PS-GTR
- Subset of HPIO
- Subset of HDIO
- SOM power
- som_240_2
- K26 only
- Additional HPIO
- Additional HDIO
- GTH transceiver
- som_40
- K24 only
- Additional HPIO
- Additional HDIO
A DXF of the mechanical connector overlay file is available at Kria SOM Carrier Connector Compatibility Overlay (XTP785).
