CH557 Datasheet - ETC

CH557 RGB-LED and USB Enhanced MCU

CH557 Datasheet 1 RGB-LED and USB Enhanced MCU CH557, USB MCU CH556 Datasheet Version: 1F http://wch.cn 1. Overview The CH557 is a USB multi-host multi-device enhanced E8051 core MCU compatible with MCS51 instruction set. 79% of its instructions are single-byte single-cycle, and the average instruction speed is 8 to 15 times faster than that of the standard MCS51. CH557 supports the maximum 32 MHz system clock frequency, built-in 64K program memory Flash-ROM and 256-byte internal iRAM and 8 Kb.

CH557 Features

* l Core: Enhanced E8051 core compatible with MCS51 instruction set, 79% of its instructions are single-byte single-cycle, and the average instruction speed is 8 to 15 times faster than that of the standard MCS51, with special XRAM data fast copy command, and double DPTR pointer. l ROM: 64KB non-volat

CH557-ETC.pdf