Download the CH540 datasheet PDF.
This datasheet also includes the CH541 variant, as both parts are published together in a single manufacturer document.
CH543 Datasheet http://wch.cn USB PD MCU CH543/CH542, USB MCU CH541/CH540
Datasheet Version: 1C http://wch.cn
1.
Key Features
l Core: Enhanced E8051 core, compatible with MCS51 instruction set, 79% of instructions are
single-byte single-cycle instructions, and the average command speed is 8 to 15 times faster than that of the standard MCS51. Special XRAM data fast copy instruction, and double DPTR pointers. l ROM: 16KB nonvolatile memory Flash-ROM which supoorts 10K times of erase/write operations. All can be used for the program address space. Or it can be divided into a 14KB program address space, a 256B data address.
