Overview
WTN6040FP-14S is a high-power voice chip developed by Guangzhou Waytronic Electronics Co., Ltd. It features PWM audio output and an integrated D-class audio power amplifier circuit capable of driving a 4-ohm 3W speaker directly. The output does not require LC filtering to function properly. It reduces EMI interference across the full bandwidth, minimizing impact on other components. Currently, the WTN6040FP-14S supports voice lengths up to 40 seconds. The audio sampling rate can reach up to 32kHz, with 16-level volume control and PWM output. The clock frequency of the chip is 13.1072 MHz (±3%). This chip allows for online replacement of internal voice content via a compatible downloader and supports one-wire and two-wire serial communication interfaces.
Functional Overview
1. Operating voltage: 2.0~5.5V (It is recommended that the minimum operating voltage should not be lower than 3.0V for normal amplifier operation);
2. Audio output method: 12-bit PWM;
3. Can directly drive a 4Ω speaker, outputting 3W at 5V;
4. Supports audio playback with sampling rates from 6kHz to 32kHz;
5. Customers can replace the internal voice content of the chip using a compatible downloader;
6. Supports one-wire serial port and two-wire serial port;
7. Maximum support for 224 address segments of voice;
8. Flash-type voice chip, both the main control program of the chip and the Flash data can be rewritten repeatedly;
9. After the chip finishes playing, it enters sleep mode after IO pins (DATA and CLK) maintain a stable level (either high or low) for 1 second;
10. The chip includes a Class D audio power amplifier circuit with an efficiency of up to 88%, eliminating the need for filters;
11. Built-in short-circuit protection, overcurrent protection, and overheating protection;
12. Excellent full-bandwidth EMI suppression capability;
13. Outstanding ‘power-on/power-off’ noise suppression;
14. Note: PA2 pin is normally low, and goes high during playback.
Pin Description
Pinout diagram
| Pad Name | Pad No. | ATTR. | Description describe |
| SPK+ | 1 | OUT | External speaker |
| SPK- | 2 | OUT | External speaker |
| COM | 3 | Bypass | Capacitors can be connected to ground (refer to subsequent schematic for specifics) to reduce high-frequency noise. |
| PA2 | 4 | I/O | Busy signal output/downloader programming port |
| PA1 | 5 | I/O | Two-wire serial clock signal input terminal / Single-wire serial data signal input terminal / Programmer burning port |
| PA0 | 6 | I/O | Two-wire serial data signal input terminal/downloader programming port |
| PA3 | 7 | I/O | Downloader programming port |
| OUT-P | 8 | OUT | Audio signal output |
| VCC | 9 | Power | Positive terminal of the power source |
| OUT-N | 10 | OUT | Audio signal output |
| GND | 11 | Power | Negative terminal of the power source |
| VPD | 12 | Power | Internal amplifier power supply |
| INP | 13 | IN | Audio signal input |
| INN | 14 | IN | Audio signal input |
Application circuit
1. Serial Port Application Circuit
2.Two-wire serial port application circuit
- Supports programming for WT588FXXA-8S, WT588FXXB-8S, and WT588S/HXX-16S modules.
- Compatible with primary, secondary, IC+, and IIC- testing (requires corresponding adapters)
- Supports programming for WT588DMXX modules (requires corresponding adapters)
- Supports external SP pin, IIC pin download and testing. Supports PWVM output and DAC (8 ohms, 1 watt) output.
- Supports WT588FXXA-8S, WT588FXXB-8S, WTN6 series one-line, two-line, IIC, SPI interfaces.
- Power-on default does not play; equipped with BUSY status indication and power status indication.
- Compatible with USB downloader for replacing WT588FXXA-8S, WT588FXXB-8S voice.
- Compatible with PC serial port for replacing WT588EXXA-8S, WT588EXXB-8S voice.
- Supports DAC output, PWM output, and PWM amplifier output.
- With the VSB board, the WT588F02A/08A/02B chips can be programmed.
- Supports offline programming download for WTN6/WT588/WTV, WT2003H series chips, including mechanical arm batch programming.
- Supports testing and communication protocols such as first-line, second-line, UART, IIC, SPI.
- Supports displaying the checksum of the programming file, programming mode, test address, etc., on the digital tube.
- Supports status indication for BUSY playback, power state, and mode indicator lights.
