User's Manual

GSM/GPRS/GNSS Module Series
MC20 Hardware Design
MC20_Hardware_Design Confidential / Released 17 / 95
1)
In this mode, GNSS part’s backup domain should be valid.
Table 4: Protocols Supported by the Module
Please refer to document [2] for details of NMEA standard protocol and MTK proprietary protocol.
2.4. Functional Diagram
The following figure shows a block diagram of MC20 and illustrates the major functional parts.
 Radio frequency part
 Power management
 Peripheral interfaces
—Power supply
—Turn-on/off interface
—UART interface
—Audio interface
—SIM interface
—ADC interface
—RF interface
—PCM interface
—BT interface
—SD interface
Protocol Type
NMEA output, ASCII, 0183, 3.01
PMTK Input/output, MTK proprietary protocol
NOTE