User's Manual

M50 Hardware Design
M50_HD_V2.0 - 17 -
Antenna interface Connected to antenna pad with 50 Ohm impedance control
1 ） When the module works in this temperature range, the deviations from the GSM specification
may occur. For example, the frequency error or the phase error will be increased.
Table 4: Coding schemes and maximum net data rates over air interface
Coding scheme 1 Timeslot 2 Timeslot 4 Timeslot
CS-1 9.05kbps 18.1kbps 36.2kbps
CS-2 13.4kbps 26.8kbps 53.6kbps
CS-3 15.6kbps 31.2kbps 62.4kbps
CS-4 21.4kbps 42.8kbps 85.6kbps
2.2. Functional diagram
The following figure shows a block diagram of the M50 module and illustrates the major
functional parts:
 Power management
 Baseband
 Serial Flash
 The radio frequency part
 The peripheral interface
—Charge interface
—PCM interface
—SD interface
—SIM interface
—Audio interface
—Serial interface
—Power supply
—RF interface
—ADC
—Turn on/off interface (PWRKEY & EMERG_OFF)
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