This document is the SIM300 Hardware Interface Description released by SIMCOM Ltd. on July 27, 2006. The document describes the hardware specifications and interface information of SIM300, as well as the technical support and services provided by Simcom to its customers.
This document describes the hardware interface of the SIMCOM SIM300 module, covering pin descriptions, power supply options, and mechanical dimensions. It includes detailed tables for pin assignments, electrical ratings, and interface characteristics such as serial, audio, SIM card, LCD, and GPIO.
The manual also outlines operating modes, power‑saving features, antenna installation, and reliability specifications, helping designers integrate the SIM300 into mobile applications and verify compliance with system requirements.
The PWRKEY pin is used to restart the SIM300.