GSM/GPRS Module
M85 Hardware Design
M85_Hardware_Design Confidential / Released 11 / 92
2
Product Concept
2.1. General Description
M85 is a Quad-band GSM/GPRS engine that works at frequencies of GSM850MHz, GSM900MHz,
DCS1800MHz and PCS1900MHz. The M85 features GPRS multi-slot class 12 and supports the GPRS
coding schemes CS-1, CS-2, CS-3 and CS-4. For more details about GPRS multi-slot classes and coding
schemes, please refer to the
Appendix B & C.
With a tiny profile of 24.5mm×25.3mm×2.6mm, the module can meet almost all the requirements for M2M
applications, including Vehicles and Personal Tracking, Security System, Wireless POS, Industrial PDA,
Smart Metering, and Remote Maintenance & Control, etc.
M85 is an SMD type module with LCC package, which can be easily embedded into applications. It
provides abundant hardware interfaces like PCM and Dual SIM Card Interface.
Designed with power saving technique, the current consumption of M85 is as low as 1.3 mA in SLEEP
mode when DRX is 5.
M85 is integrated with Internet service protocols, such as TCP/UDP, FTP and PPP. Extended AT
commands have been developed for you to use these Internet service protocols easily.
The module fully complies with the RoHS directive of the European Union.
2.2. Key Features
The following table describes the detailed features of M85 module.
Table 1: Module Key Features
Feature
Implementation
Power supply
Single supply voltage: 3.3V~4.6V
Typical supply voltage: 4V
Power saving
Typical power consumption in SLEEP mode: 1.3 mA@ DRX=5
1.2 mA@ DRX=9
Quectel
Confidential
