The scenario
Design a compact STM32H7-based device that routes two RS-232 serial links to Ethernet, suitable for industrial serial-to-Ethernet conversion.
What is in this drawing
Read the decisions behind it.
01
Use RMII for Ethernet PHY to reduce pins
02
Employ MAX232 for RS-232 level shifting
03
Onboard voltage regulation from 5V to 3.3V
Industrial IoT gateways, serial device servers, and embedded networking appliances.
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