This document introduces the user manual of the Si4432 wireless module, including module size, basic features, typical applications, module interface description, module electrical parameters, working modes, data transmission modes, etc.
This manual describes the RF4432 wireless module, which uses the Silicon Labs Si4432 chip. It covers the module’s physical dimensions, pin functions, electrical parameters, supported frequency range, and typical applications such as vehicle monitoring, remote control, and industrial data acquisition.
The document also details the three data‑transfer modes (FIFO, Direct, PN9), provides SPI read/write code examples, and gives practical notes on power consumption, voltage limits, and integration with various microcontrollers. This manual is written in Chinese.
| Frequency range | 240–960 MHz |
|---|---|
| Supply voltage | 1.8–3.6 V |
| Transmit power | 11–20 dBm |
| Receive sensitivity | -115 dBm (9.6 kbps) |
| Typical sensitivity | -107 dBm (40 kbps) |
| Data rate | 1–128 kbps |
| Shutdown current | 10 nA |
| Sleep current | 300 nA |
| Maximum transmit current | 73 mA |
| Maximum receive current | 18.5 mA |
| Operating temperature range | -40 °C to +85 °C |
The RF4432 can operate from 240 MHz up to 960 MHz.