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# CH643 RISC-V4C, 62KB Flash, 20KB SRAM. OPA/PGA/CMP, LEDPWM, USB-PD/Type-C. ## Chips ``` * CH643W-0x64300601 * CH643Q-0x64310601 * CH643L-0x64330601 * CH643U-0x64340601 ```