USB to TTL STC Series MCU Auto Programmer

Effortlessly flash firmware onto STC microcontrollers with the USB to TTL STC Series MCU Auto Programmer. Engineered specifically for the full range of STC 8051 microcontrollers, this compact USB dongle features an integrated auto-reset control circuit, eliminating the need for manual cold-starts or external power toggling during the burning process. Equipped with a CH340 USB-to-UART control core, $3.3 ext{V}$ and $5 ext{V DC}$ auxiliary power output, and a $500 ext{mA}$ self-recovering PPTC protection fuse, it doubles as a reliable USB-to-TTL serial debugger for general microcontroller development.

( No Reviews )

₹ 280 ^{₹ 390}

Order From Whatsapp

Seller Electro Boat

Tags STC MCU Auto Programmer USB to TTL Converter Board STC ISP Firmware Burner STC89C52 STC12 STC15 Programmer CH340 Auto Download Module STC Microcontroller Flasher USB Serial TTL Debugger

No Cancellation

No Returnable

Product Details :

The USB to TTL STC Series MCU Auto Programmer is a specialized firmware programming and serial communication dongle designed for STC Microcontroller families (STC89, STC10, STC11, STC12, STC15, and STC8 series). Conventional STC MCU programming via ISP requires powering down the target chip, clicking "Download" in the software, and turning power back on (cold start) to trigger the internal bootloader. This programmer automates that entire process using an onboard MCU control core paired with a CH340 USB-to-UART bridge, cutting power to the target automatically during handshake to achieve a $100%$ flashing success rate without manual switch flipping.

Housed in a protective anodized metal shell, the module provides stable baud rates up to $115200 ext{ bps}$ . It provides output power lines at both $3.3 ext{V}$ and $5 ext{V DC}$ to power target microcontrollers directly. Furthermore, an onboard $500 ext{mA}$ self-recovering fuse shields your computer's USB port from accidental overcurrent or board short-circuits during breadboard testing.

Key Features and Benefits

Automatic Cold-Start Downloading: Built-in power control circuit handles the bootloader pulse sequence automatically, removing manual reset hassles.
Full STC Series Compatibility: Supports $100%$ programming success across STC89, STC10, STC11, STC12, STC15, and STC8 chip lines.
Dual Power Output ( $3.3 ext{V}$ & $5 ext{V}$ ): Selectable target voltage output to match $3.3 ext{V}$ low-power or standard $5 ext{V}$ 8051 logic systems.
$500 ext{mA}$ Resettable Protection Fuse: Keeps host PC motherboards safe against current spikes and accidental dead shorts.
Universal USB to TTL Functionality: Functions as a standard USB-to-UART serial converter for Arduino, ESP8266, STM32, and Raspberry Pi serial debugging when not burning STC chips.
Durable Aluminum Casing: Rugged outer shell protects against mechanical impacts, ESD damage, and accidental pin shorts on workbench surfaces.

Technical Specifications

Feature Component	Specification Details
Programmer Core	CH340 USB Bridge + Dedicated Power Controller IC
Host Interface	USB 2.0 Type-A Male Plug
Operating Voltage ( $V_{CC}$ )	$5.0 ext{V DC}$ (Powered via USB)
Target Power Supply Outputs	$+3.3 ext{V DC}$ and $+5.0 ext{V DC}$ ( $le 500 ext{mA}$ )
Baud Rate Support	$300 ext{ bps to } 115200 ext{ bps}$ (Stable high-speed flashing)
Protection Circuitry	$500 ext{mA}$ Resettable PPTC Fuse
Supported Operating Systems	Windows 7 / 8 / 10 / 11 (32-bit & 64-bit), Linux, macOS
Interface Header	5-Pin $2.54 ext{mm}$ Single Row Header ( $5V, 3V3, TXD, RXD, GND$ )

Wiring & Pinout Guide

1. Pin Description:

Header Pin	Signal Name	Wiring Connection
$5V$	$+5.0 ext{V DC}$ Output	Connect to $VCC$ pin of $5 ext{V}$ STC MCU / target board
$3V3$	$+3.3 ext{V DC}$ Output	Connect to $VCC$ pin of $3.3 ext{V}$ STC MCU / target board
$TXD$	Transmit Data Line	Connect to target MCU $RXD$ ( $P3.0$ on STC89/STC12)
$RXD$	Receive Data Line	Connect to target MCU $TXD$ ( $P3.1$ on STC89/STC12)
$GND$	Common Ground	Connect to target MCU Ground ( $GND$ )

2. Wiring Diagram Example (STC89C52 / STC12C5A60S2):

Auto Programmer Pin	Target STC MCU Pin	Connection Notes
$5V$ or $3V3$	$VCC$ (Pin 40)	Select power rail matching target MCU rating
$GND$	$GND$ (Pin 20)	Ground reference connection
$TXD$	$P3.0$ / $RXD$ (Pin 10)	Cross-connected data transmit line
$RXD$	$P3.1$ / $TXD$ (Pin 11)	Cross-connected data receive line

IMPORTANT FLASHER INSTRUCTIONS:

Open official STC-ISP Software on your computer.

Select your target STC Chip Model and choose the assigned CH340 COM Port.

Click "Download/Program" in STC-ISP. The programmer automatically resets chip power, uploads the compiled Hex file, and restarts the program execution without manual switch toggling.

Applications

STC Microcontroller Development: Programming STC89C52RC, STC12C5A60S2, STC15W408AS, and STC8H series MCUs.
Legacy 8051 Project Upgrades: Modernizing firmware deployment for industrial 8051 boards.
USB to Serial Debugging: Serial terminal monitoring for Arduino, ESP32, STM32, and Raspberry Pi UART outputs.
Router & Firmware Flashing: Unbrick or upload custom firmware to routers, set-top boxes, and TV tuners via TTL UART.