Overview
WT588F02BP-14S and WT588F04AP-14S are high-power voice chip developed by Guangzhou Waytronic Electronics Co., Ltd. Their audio output type is PWM, and they feature an integrated D-class audio power amplifier circuit capable of directly driving a 4-ohm 3W speaker. The output does not require LC filtering to function normally. It reduces EMI interference across the full bandwidth, minimizing impact on other components. Currently, WT588F02BP-14S can store up to 170 seconds of high-quality voice content (if sound quality is not a concern, it can store up to 320 seconds of voice content). WT588F04AP-14S can store up to 370 seconds of high-quality voice content. Unlike traditional voice chips, these models can have their internal voice content updated online using a compatible downloader. They support one-wire and two-wire serial communication interfaces.
Functional Overview
- 1. Operating voltage: 2.5V to 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: 16-bit PWM;
- 3. Can directly drive a 4Ω 3W speaker 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 the accompanying downloader;
- 6. Supports one-wire and two-wire serial ports;
- 7. Maximum support for 1000 address segments of voice;
- 8. The WT588F02BP-14S chip has an integrated 220KB Flash memory, capable of storing up to 170 seconds of high-quality voice;
- 9. The WT588F04AP-14S chip has an integrated 460KB Flash memory, capable of storing up to 370 seconds of high-quality voice.
- 10. Flash-based voice chip, both the main control program and Flash data can be rewritten repeatedly.
- 11. The chip initialization time upon power-up is approximately 200 milliseconds.
- 12. After the chip finishes playing, and the IO pins (DATA and CLK) maintain a stable level (either high or low) for 1 second, the chip enters sleep mode.
- 13. The chip includes a Class D audio power amplifier circuit with an efficiency of up to 88%, eliminating the need for filters;
- 14. Built-in short-circuit protection, overcurrent protection, and overheat protection;
- 15. Excellent full-bandwidth EMI suppression capability;
- 16. Excellent ‘power-on/power-off’ noise suppression.
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 |
Chip application schematic diagram
Schematic diagram of primary application
Two-line application schematic diagram
- 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.
