Protocol gateways, PLC-adjacent controllers and field devices where the job is connecting four incompatible buses to one network — and where BOM cost decides whether the product ships.
Industrial sites run several fieldbuses at once. A gateway has to speak CAN, RS-485 and Ethernet, often with a wireless link on top, at a unit cost that makes deploying hundreds of them viable.
| Connectivity on one die | The CH32V307 carries a Gigabit Ethernet MAC with integrated 10M PHY, 480 Mbps USB High-Speed, dual CAN and eight USART ports. That is the whole gateway peripheral set on one chip, with a hardware FPU for control loops. |
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| Cost structure | RISC-V MCUs cut BOM cost substantially against comparable ARM parts. At the low end the CH32V003 starts at $0.10 in volume, which changes what is economical to instrument. |
| Wireless where it is needed | The CH32V208 puts BLE 5.3 and 10M Ethernet on a single die for nodes that need both a wired and a wireless path. |
How much BOM do we actually save?
It depends on the part you are replacing and your volume. The saving is largest when a single RISC-V part replaces an MCU plus external PHY or bridge — which is what the CH32V307 is designed to do.
Is the toolchain ready for industrial work?
MounRiver Studio, PlatformIO and OpenOCD all support the CH32V family, with single-wire SDI debug via WCH-LinkE.