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| Parameter Category | Item | Specification Details |
|---|---|---|
| Basic Parameters | Module Model | CH340C_USB to TTL Serial Communication Tool (A059) |
| PCB Overall Dimensions | 45.00 mm × 20.00 mm | |
| Core Conversion Chip | CH340C, compatible with full series of CH340 USB‑to‑serial chips | |
| Interface Configuration | USB‑C female socket USB1 + 5‑Pin standard pin header CN1 | |
| Supported Baud Rate | 300bps ~ 115200bps, covers commonly‑used baud rates for projects | |
| Power Supply Source | 5V power supply from USB port; pin header outputs 5V for powering external devices | |
| On‑board Hardware Circuit | PWR power indicator LED, T/R transmit‑receive status indicator LEDs, auto‑reset RST circuit, over‑current fuse, voltage‑stabilizing protection circuit | |
| Product Weight | 10 g (with housing); 4.5 g (bare PCB) | |
| 5‑Pin CN1 Pin Header Definition | GND | Power ground, must share common ground with the MCU |
| +5V | 5V power output, can supply power to target MCU | |
| TXD | Module transmit pin, connect to MCU RXD | |
| RXD | Module receive pin, connect to MCU TXD | |
| RST | Auto‑reset signal output, supports one‑click program download for Arduino | |
| Core Features‑Auto‑Reset Circuit | Built‑in RST reset output. Enables one‑click program download under Arduino IDE; no manual reset‑button operation required. | |
| Core Features‑TX/RX Status Indicator LEDs | PWR steady‑on indicates normal power supply; flickering T/R LEDs visually show serial‑port data flow. No packet‑capture tool needed for debugging. | |
| Core Features‑USB‑C Universal Interface | Reversible Type‑C connector, widely‑available cables, easy plug‑and‑play. Compatible with all USB ports on desktops and laptops. | |
| Core Features‑Hardware Protection Circuit | On‑board F1 fuse and voltage‑regulating circuit provide over‑current and reverse‑power‑protection, preventing damage to computer USB port and target main controller. | |
| Core Features‑Compact Size | Mini 45×20 mm PCB, easy to embed into panel or device housing, portable for carrying. | |
| Packaging Options | Available Packages | ① Anti‑static bag soft package ② White‑card hanging‑hole gift box ③ Kraft paper box |
