User's Manual

GSM/GPRS/GNSS Module Series
MC20 Hardware Design
MC20_Hardware_Design Confidential / Released 19 / 95
3 Application Functions
MC20 is an SMD type module with 54 LCC pads and 14 LGA pads. The following chapters provide
detailed descriptions about these pins.
 Pin of module
 Power supply
 Operating modes
 Power on/down
 Power saving
 Backup domain of GNSS
 Serial interfaces
 Audio interfaces
 SIM card interface
 ADC
 Behaviors of the RI
 Network status indication
 RF transmitting signal indication
 EASY autonomous AGPS technology
 EPO offline AGPS technology
 Multi-tone AIC