XF-S3111-FSD is a Chinese speech synthesis chip that can synthesize any text received through the serial port and convert it into voice output. The chip is COB* packaged and can be easily integrated into embedded devices that require Chinese speech synthesis functions.
The XF-S3111-FSD is a Chinese voice synthesis chip developed by iFlytek. It receives arbitrary text via a UART interface and outputs natural‑sounding speech, supporting multiple character encodings and control commands. The chip is offered in a compact COB (Chip‑On‑Board) package suitable for embedded devices.
The datasheet details the chip’s features, system block diagram, main application fields, functional description, UART communication parameters, command set, peripheral circuits, package drawings, pinout, and electrical characteristics such as voltage limits and current specifications. This manual is written in Chinese.
| Supply voltage (VDD) max | 3.6 V |
|---|---|
| Operating voltage range | 2.7 V – 3.6 V |
| Input voltage range (VIN) | -0.5 V to VDD+0.5 V |
| Operating temperature | -25 °C to +70 °C |
| Storage temperature | -40 °C to +85 °C |
| Maximum operating current (IOP) | 20 mA |
| Input high level (VIH) | 0.7 × VDD |
| Input low level (VIL) | 0.3 × VDD |
| Output current (IOH) | -2.0 mA |
| Sink current (IOL) | 4.4 mA |
| DAC output current (IDAC) | -2.0 mA |
It uses a UART serial interface with a baud rate of 9600 bps.
The reset pin is active low; the typical reset pulse is 10 ms and the chip must wait about 50 ms after release before accepting commands.
The chip is packaged in a COB (Chip‑On‑Board) form factor.
It supports GB2312, GBK, BIG5 and Unicode character encodings.