WT588F02A-16S Audio Recording & Playback Chip

Overview

WT588F02A-16S is a newly developed 16-bit DSP voice chip by Guangzhou Waytronic Electronics Co., Ltd., featuring an internal oscillator of 32 MHz and 16-bit PWM decoding. Its powerful functions make WT588F02A-16S a leader in the voice chip industry. The chip comes with 2 Mbit of built-in storage space, leaving 200 K for storing fixed voice recordings or audio; if used solely for fixed voice storage, it can support up to 320 seconds of voice content; if used solely for recording, it can record approximately 135 seconds of voice content. It also supports external flash memory, up to 128 Mbit (note that the main control program differs between using external flash and not using it; please contact our sales representative before placing an order). The chip includes various hardware resources such as SPI, UART, IIC, and comparators, allowing customization of various personalized functional products for customers.

Note: The data above is manually measured from pure audio recordings and may contain errors, with an error margin not exceeding 2 seconds. Sampling has a greater impact on audio quality; therefore, for the same duration, prioritize configurations with higher sampling rates. Using 8K sampling can result in severe distortion, so it is recommended to start using from 12K onwards.

Functional Overview

1) Operating voltage: 2.0V to 5.5V
(2) 16-bit PWM pure audio output, capable of directly driving an 8Ω/0.5W speaker; 14-bit DAC audio output, external amplifier can be connected
(3) Supports one-wire serial port control and button control
(4) Recording sampling rate: up to 16kHz. Fixed voice (reserved voice) sampling rate: up to 32kHz
(5) Supports BUSY status output function
(6) Microphone with automatic gain control
(7) The chip has built-in 2M bit flash memory
(8) Main control program and flash data of the chip can both be erased and reprogrammed
(9) Segment configuration, sampling configuration, bitrate configuration, volume configuration, gain configuration, DAC and PWM output configuration are open for customer customization.

Pin Description

Pinout diagram

Chip application schematic diagram

1.Power supply and recording circuit (standard version)

Note:
1. When wiring, capacitors C1 and C5 should be placed as close as possible to the VPD and VCC pins of the WT588F02A-16S chip to enhance the anti-interference capability of the WT588F series voice chips.
2. When an external amplifier is used, R2 can separate the analog ground from the digital ground; if not needed, R2 does not need to be installed.
3. R3 serves as the MIC voltage bias resistor during recording, typically set at 2.2K to ensure the bias is half of the supply voltage, making the maximum dynamic range of the positive and negative signal boards equal. The resistance value of R3 can be appropriately increased to improve sensitivity.
4. When powered by 3.3V, R4 does not need to be installed; when powered by 5V, R4 can be selected based on the operating voltage of the MIC. R4 mainly provides voltage division for the voltage supplied by PC6 to the MIC. Generally, it is not installed, but when installed, both R3 and R4 need to be considered together to achieve optimal voltage division and balance point for the best recording dynamic range.
5. C3 can be chosen between 10~47uF to stabilize the power supply during recording.

Power supply and recording circuit (transistor amplifier version)

Note:
1. When wiring, capacitors C1 and C5 should be placed as close as possible to the VPD and VCC pins of the WT588F02A-16S voice chip to enhance the anti-interference capability of the WT588F series voice chip;
2. When connecting an external amplifier, R2 can be used to separate the analog ground from the digital ground; if not needed, R2 does not need to be installed;
3. Components marked as NC should not be installed, they are reserved for adjustment.