The STC15W201S is a 1T 8051‑compatible microcontroller with wide voltage range, high speed (up to 35 MHz), low power and built‑in high‑precision R/C clock.
The STC15W201S series is a new generation 8051‑compatible microcontroller featuring a 1T architecture that runs 8‑12× faster than classic 8051 devices. It offers a wide operating voltage (2.5 V‑5.5 V), high‑precision internal R/C oscillator, low‑power modes, and robust reset circuitry, making it suitable for industrial and commercial applications.
Key specifications include up to 7.5 KB flash, 256 B SRAM, 14 I/O pins (SOP16/DIP16), two 16‑bit timers, a switchable high‑speed UART, and a built‑in comparator that can function as an ADC. The device supports ISP/IAP programming, RS‑485 download, and provides programmable clock output options. This manual is written in Chinese.
| Operating voltage | 2.5 V – 5.5 V |
|---|---|
| SRAM | 256 bytes |
| Maximum I/O current per pin | 20 mA (total 90 mA) |
| Clock frequency range | 5 MHz – 35 MHz |
| Timers / counters | 2 (T0 and T2) |
The device operates from 2.5 V to 5.5 V.