WT UART Writer V1.00
Universal UART Programmer for WT2003H, WTV380, WT3000T, WTK6900, and WT2605 Series Voice Chips
The WT UART Writer V1.00 is a versatile UART programmer designed by Waytronic for a wide range of voice chips. It emulates a USB mass storage device, allowing drag‑and‑drop file copying directly from your computer. Compatible with WT2003H, WTV380/WTV890, WT3000T, WTK6900, WT2605A, and WT2605C series, this downloader features on‑board self‑upgrade capability, version readback, and clear LED status indicators (POWER, SUCCEED, FAIL). It is an essential tool for production programming and field updates.
- Universal compatibility – WT2003H, WTV380, WT3000T, WTK6900, WT2605A/C
- Drag‑and‑drop – copy BIN files via USB mass storage
- Self‑upgrade – firmware upgrade via Type‑C
- LED indicators – POWER, SUCCEED, FAIL for clear status
- UART interface – simple TX/RX connection
Supported Chips & Pin Mapping
WT2003H Series
| Downloader | WT2003HX-16S | WT2003HX-24SS | WT2003HX-32N |
|---|---|---|---|
| 3.3V | VCC (PIN11) | VCC (PIN16) | VCC (PIN8) |
| GND | GND (PIN12) | GND (PIN17) | GND (PIN0) |
| TX | RXD (PIN6) | RXD (PIN11) | RXD (PIN2) |
| RX | TXD (PIN16) | TXD (PIN23) | TXD (PIN15) |
WTV380 / WTV890 Series
| Downloader | WTVxx-8S | WTVxx-32N |
|---|---|---|
| 3.3V | VCC (PIN6) | VCC (PIN8/9) |
| GND | GND (PIN8) | GND (PIN4) |
| TX | RXD (PIN2) | RXD (PIN19) |
| RX | TXD (PIN1) | TXD (PIN13) |
WT3000T Series
| Downloader | WT3000Tx-32N |
|---|---|
| 3.3V | VCC (PIN10) |
| GND | GND (PIN0) |
| TX | RXD (PIN23) |
| RX | TXD (PIN24) |
WTK6900 Series (HAx / HCx / FC)
| Downloader | WTK6900HAx-24SS | WTK6900HAx-32N | WTK6900HCx-24SS | WTK6900HCx-32N | WTK6900FC-24SS | WTK6900HAx-16S | WTK6900HCx-16S |
|---|---|---|---|---|---|---|---|
| 3.3V | VCC (17) | VCC (9) | VCC (17) | VDD (10) | VCC (2) | VCC (3) | VCC (3) |
| GND | GND (20) | GND (16) | GND (10) | GND (0) | GND (8) | GND (15) | GND (15) |
| TX | DAT (3) | SDA (24) | D- (1) | SDA (23) | RX (15) | DAT (11) | DAT (11) |
| RX | CLK (4) | SCL (25) | D+ (2) | SCL (24) | TX (14) | CLK (12) | CLK (12) |
WT2605A Series
| Downloader | WT2605A-24SS |
|---|---|
| 3.3V | VCC (PIN17) |
| GND | GND (PIN20) |
| TX | DAT (PIN3) |
| RX | CLK (PIN4) |
WT2605C Series
| Downloader | WT2605C-32N |
|---|---|
| 3.3V | VCC (PIN10) |
| GND | GND (PIN0) |
| TX | RX (PIN25) |
| RX | TX (PIN26) |
Key Features
LED Status Indicators
| Indicator | Function |
|---|---|
| POWER | Power indicator – always on when the downloader is powered |
| SUCCEED | Success indicator – blinks during download, lights up on success. On power-up, flashes 3 times with FAIL |
| FAIL | Failure indicator – lights up on download failure. On power-up, flashes 3 times with SUCCEED |
Quick Operation Guide
Self‑Upgrade & Version Readback
Self‑Upgrade
- Place the upgrade file on the USB drive (provided by Waytronic).
- Press and hold the START button while powering up.
- SUCCEED and FAIL LEDs alternate flashing during upgrade.
- On success: SUCCEED lights up for 2 seconds, then the downloader resets.
- A
LOG.TXTlog file is generated with the result.
Version Readback
- Ensure no BIN or HEX files are on the USB drive.
- Short‑press the START button.
- The FAIL LED flashes during the process.
- The version information is written to the USB drive.
Application Scenarios
Why Choose WT UART Writer V1.00
Frequently Asked Questions
What chips does the WT UART Writer V1.00 support?
It supports WT2003H series, WTV380/WTV890 series, WT3000T series, WTK6900 series, WT2605A series, and WT2605C series voice chips.
How do I use the downloader?
1) Copy the BIN file to the USB drive. 2) Connect the downloader pins to the target chip. 3) Press the START button. 4) Check the LED indicators (SUCCEED lights up on success, FAIL flashes on failure).
What do the LED indicators mean?
POWER: Power indicator (always on). SUCCEED: Blinks during download, lights up on success. FAIL: Lights up on download failure. On power-up, SUCCEED and FAIL flash 3 times together.
Can the downloader be self-upgraded?
Yes. Press and hold the START button during power-up. The downloader will enter upgrade mode. SUCCEED and FAIL LEDs alternate flashing during the process. A LOG.TXT file will be generated to confirm the result.
How do I read the firmware version?
Ensure no BIN or HEX files are on the USB drive, then short-press the START button. The FAIL LED will flash, and the version information will be written to the drive.
What is the operating voltage?
The downloader can be powered via Type-C (5V) or through the VCC/GND pins (3.3V–5V).
Do I need to disconnect the MCU before downloading?
Yes. The MCU pins connected to the voice chip should be set to high-impedance or floating state to prevent interference during the download process.
What are the buttons on the downloader for?
START button: Short press to start download; long press during power-up to enter self-upgrade mode. RST button: Reset the downloader.
How do I get the BIN file for my chip?
For WT2003H and WTV380/WTV890 series, generate voice BIN via the web tool at http://wt588f.waytronic.com:8443. For other series, please contact Waytronic sales for the appropriate BIN files.
What happens if the download fails?
The FAIL LED will flash. A LOG.TXT log file will be generated on the USB drive to help diagnose the issue. Common causes include incorrect pin connections or MCU pins not released.
Important: Only one BIN or HEX file should be present on the USB drive at a time – remove other files to avoid conflicts. Disconnect MCU pins (set to floating/high‑impedance) before downloading. For first-time use, format the USB drive before copying BIN files. A LOG.TXT log file is generated after each download attempt for troubleshooting. Contact Waytronic sales for chip‑specific BIN files and upgrade firmware.
