10BASE-T1S MAC-PHY HAT ONSEMI
Raspberry Pi HAT based on the onsemi T30HM1TS2500 10BASE-T1S MAC-PHY, with SPI host interface, PLCA support and selectable bus termination.
Open schematic PDF
The schematic review of this first hardware revision has closed. The six-page schematic remains available above as an archived reference. The review campaign and its free-HAT offer have ended.
The HAT brings 10BASE-T1S Ethernet to a Raspberry Pi using the onsemi T30HM1TS2500 MAC-PHY. The published design includes an SPI host interface, PLCA support and selectable bus termination.
Review scope
The review covered the T30HM1TS2500 supply, decoupling and 25 MHz clock; SPI, IRQ and Raspberry Pi GPIO; 10BASE-T1S coupling, common-mode choke and ESD protection; selectable 100 Ω split termination; connector layout; and EMC considerations. Software, Linux Device Tree integration and enclosure design were outside its scope.
Archived review questions
- Are the coupling and selectable split termination suited to multidrop installations?
- Are the device’s mandatory supply, clock and SPI requirements met?
- Is the common-mode choke, ESD protection and shield concept appropriate?
- Are the connectors, termination and diagnostics suitable for an industrial installation?
Interactive view
Design views
