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Nov 13, 2026 4:58 PM UTC
Question

STiH418 / H418-HUB: BGA pinout for UART and SPI

Hi everyone,

I’m looking for the BGA pinout of an ST device marked H418-HUB, which I believe is an STiH418.

I found the public data brief (DocID026633) and the Linux device-tree sources, but I’m missing the mapping from the logical PIO signals to the physical BGA balls. Specifically, I’m trying to locate:

  • UART10: PIO3[4] (TX) and PIO3[5] (RX)

  • SPI-FSM: PIO40[0–5]

Does anyone know where to find the package ball assignments and the corresponding I/O voltage specifications? I would also be interested in the full hardware reference manual, particularly the sections covering pin multiplexing, UART and SPI-FSM. If access to the complete manual is restricted, a pinout table or an extract covering these interfaces would already be helpful.

I also found references to the 4kopen B2264 board, which used the same SoC and offered schematics and an ST MicroConnect 2 JTAG connection document. However, the 4kopen project appears to have been abandoned: its former website and documentation resources are no longer accessible.

Are these documents still available elsewhere, or is there a suitable ST support contact for this legacy device? 

Thanks!