User's Manual

Smart Machine Smart Decision
SIM868_Hardware_Design_V1.00 10 2016-06-20
1. Introduction
This document describes SIM868 hardware interface in great detail. The document can help customer to quickly
understand SIM868 interface specifications, electrical and mechanical details. With the help of this document
and other SIM868 application notes, customer guide, customers can use SIM868 to design various applications
quickly.
2. SIM868 Overview
Designed for global market, SIM868 is integrated with a high performance GSM/GPRS engine and a GNSS
engine. SIM868 is a quad-band GSM/GPRS module that works on frequencies GSM 850MHz, EGSM 900MHz,
DCS 1800MHz and PCS 1900MHz. SIM868 features GPRS multi-slot class 12/class 10 (optional) and supports
the GPRS coding schemes CS-1, CS-2, CS-3 and CS-4. The GNSS solution offers best-in-class acquisition and
tracing sensitivity, Time-To-First-Fix (TTFF) and accuracy.
With a tiny configuration of 17.6*15.7*2.3mm, SIM868 can meet almost all the space requirements in
customers’ applications, such as smart phone, PDA and other mobile devices.
SIM868 is a SMT+LGA package with 77 pads, and provides all hardware interfaces between the module and
customers’ boards.
 One 3 lines serial port and one full modem serial port;
 USB interface which can be used for debugging and upgrading firmware;
 Audio channels which include a microphone input and two speakers output;
 Programmable general purpose input and output;
 Two SIM cards interface;
 Support GNSS function;
 SD card interface;
 I2C interface;
 ADC interface.
SIM868 is designed with power saving technique so that the current consumption is as low as 0.65 mA in sleep
mode (with GNSS engine powered down).
SIM868 integrates TCP/IP protocol and extended TCP/IP AT commands which are very useful for data transfer
applications. For details about TCP/IP applications, please refer to document [2].
2.1. SIM868
Table 1: Module Information
Information SIM868
GSM 850,900,1800 and 1900MHz
GNSS GNSS interface
FLASH 32Mbit
RAM 32Mbit
2.2. SIM868 Key Features
Table 2: SIM868 Key Features