Functional Diagram - SimCom SIM548C HD V1.01 Hardware Design

SIM548C Hardware Design
Timer function
Physical characteristics
Firmware upgrade
(1) The module does work, but deviations from the GSM specification may occur, For example,
both the frequency error and the phase error will be large.
Table 4: Coding schemes and maximum net data rates over air interface
Coding scheme
CS-1:
CS-2:
CS-3:
CS-4:

2.2 Functional diagram

The SIM548C have two circuits parts (GSM part and GPS part) which are place on one PCB and
have only one connector .The following figure shows a functional diagram of the SIM548C and
illustrates the mainly functional part:
GSM part:
The GSM baseband engine
Flash and SRAM
The GSM radio frequency part
The antenna interface
The board-to-board interface
GPS part:
The SIRFIII GPS engine
The GPS radio frequency part
The antenna interface
The board-to-board interface
SIM548C_HD_V1.01
Programmable via AT command
Size: 50±0.15 x 33±0.15 x10.3±0.3mm (including application
connector)
50±0.15 x 33±0.15 x 8.8±0.3mm (excluding application
connector)
Weight: 16.5g
Firmware upgrade by serial port
1 Timeslot
9.05kbps
13.4kbps
15.6kbps
21.4kbps
17
2 Timeslot
18.1kbps
26.8kbps
31.2kbps
42.8kbps
4 Timeslot
36.2kbps
53.6kbps
62.4kbps
85.6kbps
09.05.2008